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OSIRIS is a financially motivated ransomware group that conducts data-theft-and-encryption extortion. It has been reported to exfiltrate victim data using Rclone to cloud storage before encrypting systems, enabling double-extortion pressure through the threat of data disclosure. OSIRIS has operated a dark-web leak site and has claimed responsibility for victim compromises, publishing images as purported proof. Its ransomware activity reportedly includes stopping SQL, Exchange, and backup-related services and deleting Volume Shadow Copy snapshots to impede recovery.
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.
5 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.
Double-extortion ransomware operation first observed in November 2025. It uses Rclone for exfiltration, disables services including SQL, Exchange, and backup services, deletes shadow copies, and encrypts systems.
OSIRIS is a ransomware group that claimed responsibility for a breach affecting multiple business units of a large company, using leak sites to prove their claims.
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.