Funksec Ransomware

Description Summary

~113 victims Dec 2024–Mar 2025; now DEFUNCT with a free decryptor released (Avast + law enforcement).

Threat Actor

Heavily AI/LLM-assisted tooling; single Rust binary disables 50+ processes; double extortion.

Technical Indicators

Encryption Extension
Not publicly reported
Encryption Algorithm
ChaCha20 + Poly1305 via orion-rs 0.17.7 (Rust); files grow ~37%
Ransom Note Name
Not publicly reported
Targeted Industries
Cross-sector (per leak-site victim telemetry)
First Seen
December 2024
Last Seen
DEFUNCT (~March 2025; free decryptor available)
Geographical Location
Global / not publicly profiled

MITRE ATT&CK Matrix

Tactic TTP Technique Name
Impact x 2 T1486 Data Encrypted for Impact
T1490 Inhibit System Recovery
Exfiltration x 1 T1567 Exfiltration Over Web Service (leak site)
Initial Access x 2 T1190 Exploit Public-Facing Application
T1078 Valid Accounts