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Apos Security, also known as AposSecurity, is a financially motivated cyber-extortion group that emerged publicly in April 2024. The group promoted a ransomware-as-a-service (RaaS) offering on criminal forums before publicly releasing its services and has been linked to collaboration with the Devman extortion group. Apos Security conducts data-theft extortion operations: it exfiltrates victim data and threatens public disclosure through a dedicated leak site rather than relying on file encryption. Its activity has included posting healthcare-sector victims, and its operations have been characterized as opportunistic attacks against small and medium-sized organizations.
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.
1 distinct technique observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
3 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.
RaaS-promoting ransomware group active on dark web forums and collaborating with Devman; ranked among the top five highest-risk groups in H1 2025.
AposSecurity is an extortion group that focuses on exfiltrating data and threatening to publish it, rather than encrypting files. They use data leak sites to pressure victims into paying extortion demands.
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.