Killsec Ransomware

Description Summary

250+ victims by late 2025; one of the most affiliate-friendly RaaS panels.

Threat Actor

RaaS — $250 entry, 88% affiliate split; Tor panel + builder; access via AWS S3 misconfig, weak IAM, legacy RDP.

Technical Indicators

Encryption Extension
Not publicly reported
Encryption Algorithm
Custom AES-256 via a lightweight loader (Advapi32 manipulation for AV evasion)
Ransom Note Name
Not publicly reported
Targeted Industries
Healthcare, Financial services, Government
First Seen
Oct 2023 (hacktivist) → RaaS June 2024
Last Seen
Active (250+ victims)
Geographical Location
Global

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