Loading threat actor…
Argonauts Group is a ransomware and data-extortion operation associated with a dedicated leak site. It has been publicly associated with leak-site postings involving healthcare entities and a ransomware incident affecting a Japanese organization. In one documented 2024 case involving a Japanese organization, the group’s leak publication occurred 75 days after the incident was recognized or occurred. Public leak-site listings are extortion claims and do not independently confirm the scope or success of an intrusion.
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.
2 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
2 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.
Named ransomware/extortion group noted as an outlier for taking 75 days between attack and leak publication against a Japanese victim.
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.