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Rewterz Threat Alert – APT Group Gamaredon – Active IOCs
June 28, 2022
Rewterz Threat Alert – NJRAT – Active IOCs
June 28, 2022

Rewterz Threat Alert – DJVU Ransomware – Active IOCs

June 28, 2022

Severity

High

Analysis Summary

The STOP/DJVU ransomware initially made headlines in 2018 and has since been attacking individuals all around the world. It’s widespread on torrent sites and other platforms in software crack packages and adware bundles. The STOP/DJVU ransomware is a Trojan that encrypts files. It infiltrates your computer invisibly and encrypts all of your data, making them unavailable to you. It leaves a ransom letter warning which demands money in exchange for decrypting your data and making them available to you again. Malware is delivered via cracked applications, fake set-up apps keygens, activators, and Windows updates. It does not utilize local information like keyboard layouts or timezone settings to prevent infecting victims in certain countries; instead, it uses the information returned by a request to https[:]//api.2ip.ua/geo.json. The card’s MAC address is utilized to provide unique identification for the system. This identity is provided to STOP’s command and control server, which responded with an RSA-2048 public key for encryption. Additional malware, including an information stealer known as Vidar, is then downloaded and installed.

Impact

  • Information Theft
  • File Encryption

Indicators of Compromise

MD5

  • c4f47a01cb07b0d3fb19116983f876e1

SHA-256

  • 1b1c802dd4ca79472c11140de063fff7fa6e37dbfea1bcfa6e21eafc76d98bc6

SHA-1

  • 7c57b816db7285548d7e793d866d156bbd06fb11

Remediation

  • Block all threat indicators at your respective controls.
  • Search for IOCs in your environment.
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      • Compromise Assessment
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    •     SIEM Gap Analysis
    •     SIEM Optimization
    •     SOC Content Pack
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    • Tabletop Exercise
    • Simulated Cyber Attack Exercises
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      • Remote SOC
      • Onsite SOC
      • Hybrid SOC
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      • Managed Detection and Response
      • Managed Endpoint Detection and Response
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      • Managed Penetration Testing
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