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Rewterz Threat Alert – Emotet is Back from Holiday
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January 14, 2020

Rewterz Threat Alert – SAIGON Might be Ursnif

January 14, 2020

Severity

Medium

Analysis Summary

Ursnif (aka Gozi/Gozi-ISFB), discovered in 2006, may be one of the oldest banking Trojans still active. After its source code was leaked, a number of variants sprang up. SAIGON may be more of a generic backdoor than just a banking Trojan. During infection, SAIGON is stored in the registry as a Base64-encoded shellcode blob. On a scheduled basis, a task is used to launch the blob using PowerShell. Communication with its command and control servers is via multipart/form-data encoded requests over HTTPS using the POST command. Although SAIGON may share Ursnif’s source code. it may be designed for a more targeted attack approach than Ursnif.

Impact

  • Credential theft
  • Financial loss

Indicators of Compromise

MD5

  • 30c23ec53a3443b6d53a6c8ad29cbcc8
  • 2f699110efa494ffd630cea68689313d

SHA-256

  • 431f83b1af8ab7754615adaef11f1d10201edfef4fc525811c2fcda7605b5f2e
  • 628cad1433ba2573f5d9fdc6d6ac2c7bd49a8def34e077dbbbffe31fb6b81dc9

SHA1

  • 0b18ea041f8b467158b96ab8c655e97329b95a45
  • 8d008f218911943645a52303ada353156a7304bc

URL

  • http[:]//softcloudstore[.]com
  • https[:]//cdn-digicert-i31[.]com
  • https[:]//cdn-gmail-us[.]com
  • https[:]//cdn-google-eu[.]com
  • https[:]//cdn-mozilla-sn45[.]com
  • https[:]//google-download[.]com
  • https[:]//mozilla-yahoo[.]com

Remediation

  • Block all threat indicators at your respective controls.
  • Always be suspicious about emails sent by unknown senders.
  • Never click on the links/attachments sent by unknown senders.
  • Services
    • Asses
      • Compromise Assessment
      • APT Assessment
      • Penetration Testing
      • Secure Architecture Design & Review
      • Red Team Assessment
      • Purple Team Assessment
      • Social Engineering
      • Source Code Review
    • Respond
      • Incident Response
      • 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
    • Careers
    • Contact
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