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J Group is a ransomware group first noted in reporting on the May 2025 ransomware landscape. The available content describes it as a newly emerged group alongside DATACARRY and Dire Wolf. It was reported to have begun operations by claiming attacks affecting 9 companies, and separate reporting cited J Group in incident counts of 8 and 10–13 incidents. No high-confidence technical details are provided in the source content regarding its malware family behavior, encryption methods, initial access vectors, tooling, victimology beyond those aggregate counts, associated threat actors, or specific indicators of compromise.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Ransomware operation referenced as a mid-volume group impacting industrial sectors.
Ransomware operation referenced as active against industrial sectors in Q2 2025 (no additional detail provided).
Newly emerged ransomware group active as of May 2025, claimed attacks across multiple countries and organizations.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.