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Rewterz Threat Advisory – CVE-2022-1976 – Linux Kernel Vulnerability

June 20, 2022
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Rewterz Threat Alert – APT-C-23 or AridViper Threat Group – Active IOCs

June 20, 2022

Rewterz Threat Alert – DJVU Ransomware – Active IOCs

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

  • b2bf82cd13c0dd441b966b1355c633c7
  • 931e7c316edc417a750b47b9b1700552

SHA-256

  • 96c89c88b564285109b05c3ee26f2568a08b3d14f5287ae917ae30d0d4118ac1
  • 56263e608a7a7d590bac5694a5170adb692e98be4a5f0882a891b0ceb6175870

SHA-1

  • 12802dd1ac9aa2bf4f9f286c62822710ae9b82ca
  • 4340e53e52aedf40a105de8662c3b9adf25029a8

Remediation

  • Block all threat indicators at your respective controls.
  • Search for IOCs in your environment.

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