Sarcoma Ransomware

Description Summary

Third-place global ransomware within its first month; 100+ victims, no LE action as of late 2025.

Threat Actor

RaaS; double extortion; exfil via Rclone/WinSCP/cURL.

Technical Indicators

Encryption Extension
Not publicly reported
Encryption Algorithm
ChaCha20 + RSA-4096 (some reports AES-256 + RSA-2048); CryptoPP, multithreaded; ESXi support
Ransom Note Name
Not publicly reported
Targeted Industries
Cross-sector (per leak-site victim telemetry)
First Seen
October 2024
Last Seen
Active (100+ victims)
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