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Rewterz Threat Advisory – CVE-2020-4497 – IBM Spectrum Protect Plus Vulnerability
December 16, 2022
Rewterz Threat Alert – APT SideWinder Group Targeting Pakistan – Active IOCs
December 16, 2022

Rewterz Threat Alert – GandCrab Ransomware – Active IOCs

December 16, 2022

Severity

High

Analysis Summary

GandCrab – a ransomware-as-a-service variant – was discovered in early 2018. At least five versions of GandCrab have been created since its discovery. GandCrab ransomware encrypts victim’s files and demands ransom money in exchange for decryption keys. GandCrab targets organisations and individuals that use Microsoft Windows-powered PCs. This ransomware has attacked a huge number of systems in India, Chile, Peru, the United States, and the Philippines. This ransomware has been linked to some of the most notorious ransomware outbreaks, resulting in enormous financial losses for victims. To effectively victimize the target, its operators frequently try to imitate reputable services. In January 2020, for example, GandCrab was transmitted in a word document labeled “Flu pandemic warning.doc” that purportedly came from the Centers for Disease Control. The virus is assigned various name by different antivirus software including Trojan.Ransom.GandCrab, Win32/Filecoder.GandCrab, Ransom: Win32/GandCrab, and others

Impact

  • Files Encryption

Indicators of Compromise

MD5

  • 1b795c401b1a636f16fa6b9010bd5ba8
  • 23fed414506b78e0571fb17b9bddf93a

SHA-256

  • 1991cf4a8b3e143f6c776ad486eaa5f0142e4cc451fed6e9da361557f6cb7b16
  • 9a7f029c48f8e2f2d21a9d2241b67455f728ce6a4a006b7742ef3d57dafb1509

SHA-1

  • a449c082011f19303af0af792701b2a2cfc3ccd5
  • f2c91a4c58bb38c582c8c929c79bde057939b777

Remediation

  • Block all threat indicators at your respective controls.
  • Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
  • Maintain cyber hygiene by updating your anti-virus software and implementing a patch management lifecycle.
  • Maintain Offline Backups – In a ransomware attack, the adversary will often delete or encrypt backups if they have access to them. That’s why it’s important to keep offline (preferably off-site), encrypted backups of data and test them regularly.
  • Emails from unknown senders should always be treated with caution.
  • Never trust or open ” links and attachments received from unknown sources/senders.
  • Patch and upgrade any platforms and software timely and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.
  • Along with network and system hardening, code hardening should be implemented within the organization so that their websites and software are secure. Use testing tools to detect any vulnerabilities in the deployed codes.
  • Enable antivirus and anti-malware software and update signature definitions in a timely manner. Using multi-layered protection is necessary to secure vulnerable assets
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    • Assess
      • Compromise Assessment
      • APT Assessment
      • Penetration Testing
      • Secure Architecture Design & Review
      • Red Team Assessment
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      • Social Engineering
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    • 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
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      • Managed Penetration Testing
  • Solutions
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    • About Us
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    • Contact
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