medusalocker
Intelligence Profile
Medusa is a DDoS bot written in .NET 2.0. In its current incarnation its C&C protocol is based on HTTP, while its predecessor made use of IRC.
Threat Analysis
medusalocker is a ransomware operation that deploys encryption-based extortion against organizations globally. This group maintains a data leak site (DLS) to pressure victims into paying ransom demands.
Financially motivated threat actors like medusalocker prioritize monetary gain through methods such as ransomware deployment, banking trojans, cryptocurrency theft, BEC scams, or credential harvesting for resale on underground markets.
Ransomware Victims (63)
CTIWATCH tracks 63 organizations claimed as victims by medusalocker on its data leak site, with attack dates, sectors and countries.
View full victims list →Known Campaigns
Medusalocker is conducting an active ransomware campaign targeting organizations across 0 countries. 2 confirmed victims recorded in the last 45 days. Campaign status: ACTIVE (last activity 2 Apr 2026).