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C77L is a ransomware operation assessed to be operating out of Iran. It has been linked to at least 40 attacks since March 2025, with observed targeting focused on enterprises in Russia and Belarus. Malware artifacts associated with a ransomware encoder have been attributed to the group, indicating involvement in development or deployment of encryption tooling. Based on confirmed reporting, C77L is best characterized as a financially motivated cybercriminal actor conducting ransomware intrusions against organizations in the post-Soviet region.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Geographies tied to known operations.
Attributed origin per open-source reporting.
3 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Ransomware operation assessed Iran-based, targeting Russian and Belarusian enterprises; gains initial access via weak passwords on exposed RDP/VPN services and encrypts Windows-heavy environments.
Ransomware operation assessed to operate from Iran, conducting attacks primarily against Russian and Belarusian enterprises; gains initial access via weak passwords on exposed RDP/VPN services.
Linked (via artifacts) to development/creation of a ransomware/encoder variant detected as Trojan.Encoder.41868.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.