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The Kohei Family is a Japanese organized crime group identified as an affiliate of the Sumiyoshi-kai. Japanese authorities have alleged links between the group and anonymous "Tokuryu" criminal networks involved in special fraud as well as social-media-based investment and romance scam activity. Reported law-enforcement focus on the group indicates suspected involvement in fraud operations supported by recruiters, call-center infrastructure, money-mule networks, and cash-out channels used to move criminal proceeds. Based on the available information, the group is associated with financially motivated criminal activity rather than state-directed operations. High-confidence reporting supports fraud-linked operational roles and cash-out logistics, but does not establish a broader cyber intrusion profile, malware tradecraft, or ransomware activity.
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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.
Attributed origin per open-source reporting.
1 distinct technique observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.