Zorab
Zorab is ransomware that uses deception as its primary infection mechanism. It masquerades as a legitimate decryptor for STOP Djvu ransomware, tricking victims into executing a fake recovery tool. Instead of decrypting data, it re-encrypts victims’ files and appends the .ZRB extension. The provided content places Zorab among emerging ransomware threats discussed in the 2025 landscape. A key defender consideration explicitly noted in the content is the need to validate decryptor tools carefully because of Zorab’s deceptive delivery method. The content also states that security researchers released a decryptor for Zorab infections. High-confidence indicator information directly mentioned includes the .ZRB file extension.
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Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Zorab ransomware is mentioned as a new menace in the 2025 ransomware landscape, indicating its emergence as a notable threat during the year.
Zorab is ransomware that disguises itself as a decryptor for STOP Djvu ransomware, but instead re-encrypts victims' files with a .ZRB extension.
Deceptive ransomware that impersonates a STOP/Djvu decryptor; when executed it re-encrypts victim files and appends the .ZRB extension. A third-party decryptor for Zorab infections is reported to exist.
The version that knows your environment.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.