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Rewterz Threat Advisory – Multiple Adobe Illustrator Vulnerabilities
February 10, 2022
Rewterz Threat Update – Increased Malware Attacks in Linux-based Multi-Cloud Environments
February 10, 2022

Rewterz Threat Update – Windows Utility Regsvr32 Targeted by Cybercriminals – Active IOCs

February 10, 2022

Severity

Medium

Analysis Summary

Qbot and Lokibot trojans are being deployed using the windows Regsvr32.exe tool also known as LOLBin (living-off-the-land binary). Various types of malicious Microsoft files are being used to spread the malware which are attempting to execute the .OCX files

“During our analysis of these malware samples, we have identified that some of the malware samples belonged to Qbot and Lokibot attempting to execute .OCX files…97 percent of these samples belonged to malicious Microsoft Office documents such as Excel spreadsheet files.” Threat Researchers from Uptycs Labs. 

Most of the files found by the researchers are .XLSB or .XLSM files with some being composite documents (.DOCX, .DOC, or .DOCM). LOLBins (Regsvr32) are legitimate tools and therefor much more easier to evade detection. However, specific behaviors can be tracked by security teams:

  • Look for parent/child process relationships where Regsvr32 is executed with parent process of Microsoft Word or Microsoft Excel; And, it can be identified by looking for Regsvr32 executions that load the scrobj.dll, which executes a COM scriptlet.

Impact

  • Unauthorized Access
  • Financial Theft 
  • Information Theft

Indicators of Compromise

MD5

  • 0dc402a72f0a963d5ab34f2981ad75ef
  • 940217c5a3e41aa24b3b6c44c80d4b12
  • a342af2e40255e71a880ea25d17bb4fb
  • c42598d9ac9706b38a48ef7b89bed705
  • abebd0ed6fd6c71bf1593efc5eb3312f
  • 945d83a418f75a92b49dcc2edfff7bc2
  • 2c143cb00ba51e11599d49da287334e3
  • 73e183aacd897cf94d2cfbdfd1c760ce

SHA-256

  • 77d6239a1082b6dfc5ad9d1c07fcc9610ed933195067e112a0947cb8c149b5d5
  • 619b6b570b741c44e962e932f7a5c481ed80d0ecbbd4b206973e62518f005920
  • ec69f8bded9b8283ebc2a81975504e23d3abe640f00ea14093711146e6d8ecda
  • 6ad9370ba731592762bf0b31c3e1fef164d0618bd435fe5a0cca93e97f3388c3
  • 44609be274ceb47badbb35cb9b9bd861a2ca4a0aec9c8348fbabac39816ed73f
  • 4dcebe79291eed1106316d13c82e2373457c359dc465072a98559eb1bf1fe7dc
  • 957d20eb5a12d027a6a5a26b63664f300a1d656d6e14db312d84bd92fc4eb14f
  • 44153c015da5aeb82c7f6266da77407d2b4d76f886d53b88f63bee7ed09b930c

SHA-1

  • 88ba0830634d1e2ddb1189731ce6e7e30a62bda5
  • 1aeb040fd0132ddde401324104508ba050356599
  • 3fddbc9d1c9e0f79ceef6f06579196c0f9f10663
  • 5aa8940900c11cc76d963cbcfcc993a3e44b2e0d
  • c42533786aeda835eb77ecdb7eb8aaa0bceb0b85
  • 402a495d7c1d4c5c4efdd037f3ed5c6301b527a4
  • 78fd85ecd417069669cac0de5b653edf2dd27bce
  • 246e9725387abd343b7b27a9aaf24b542919eb90

Remediation

  • Block all threat indicators at your respective controls.
  • Always be suspicious about emails sent by unknown senders.
  • Search for IOCs in your environment.
  • Services
    • Assess
      • Compromise Assessment
      • APT Assessment
      • Penetration Testing
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    • Respond
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      • Incident Analysis
  • Transform
    • SOC Consultancy
    •     SOC Maturity Assessment
    •     SOC Model Evaluation
    •     SOC Gap Analysis
    •     SIEM Gap Analysis
    •     SIEM Optimization
    •     SOC Content Pack
  • Train
    • Security Awareness and Training
    • Tabletop Exercise
    • Simulated Cyber Attack Exercises
  • Managed Security
    • Managed Security Monitoring
      • Remote SOC
      • Onsite SOC
      • Hybrid SOC
    • Managed Security Services
      • Managed Detection and Response
      • Managed Endpoint Detection and Response
      • Managed Threat Intelligence
      • Managed Threat Hunting
      • Managed Risk-Based SOAR
      • Managed Penetration Testing
  • Solutions
  • Resources
    • Blog
    • Threat Advisory
  • Company
    • About Us
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