C77L
C77L is a ransomware operation assessed to be operating out of Iran. It has been tied to at least 40 ransomware attacks against Russian and Belarusian enterprises since March 2025. Artifacts associated with an encoder detected as Trojan.Encoder.41868 indicate C77L’s involvement in its creation.
Know when an actor pivots toward your sector
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
Targeting
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Where they target
Geographies tied to known operations.
- 🇷🇺 Russia
- 🇧🇾 Belarus
Tradecraft
3 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
Recent activity
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.
The version that knows your environment.
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.