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Kill Security is an emerging financially motivated ransomware and data-extortion operation that surfaced in late 2024 and became operationally visible at scale during 2025. The group operates a dedicated leak site and publicly lists alleged victims as part of its extortion activity. Its victim listings have included healthcare entities and a South Korean university-application platform. Dedicated leak-site postings are extortion claims and do not independently establish that a listed organization was compromised, the scope of any intrusion, or whether data was exfiltrated. Kill Security's geographic origin, technical malware tooling, initial-access methods, encryption use, and organizational structure have not been established with high confidence.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Associated with healthcare-sector dedicated leak-site postings.
Newer extortion/ransomware actor that became visible at scale in 2025 via DLS claims.
Ransomware group with a focus on India, promoting RaaS and maintaining steady attack volume.
Kill Security is identified as a major ransomware group active in September 2025.
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.