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Ransomware group profile · #398 by claimed victims

Core ransomware

Core is a ransomware operation tracked by VULONE since September 2026.

Defunct First seen Sep 2026
0Victims claimed on leak sites
0Victims in the last 30 days
0Victims in the last 90 days
0Countries hit
0Leak-site URLs tracked
—Latest claim recorded

Tactics, techniques and procedures

ATT&CK technique mapping for Core is in progress. Victimology, infrastructure status and leak-site tracking are live above.

Indicators, detections and the full playbook

Hashes, C2 addresses, onion services, Sigma and YARA detections per technique, and the negotiation transcripts are available to signed-in analysts.

See full IOCs

Frequently asked

Is Core ransomware still active?
Core is tracked as defunct.
How many victims has Core claimed?
VULONE has recorded 0 leak-site victim claims attributed to Core, across 0 countries and 0 sectors.
Which industries does Core target?
Sector data for Core victims is not yet available.
Which countries are most affected by Core?
Country data for Core victims is not yet available.
Where does VULONE get Core victim data?
Claims are collected continuously from the group's own leak sites and cross-checked with ransomware.live and RansomLook. A claim is the group's assertion, not a confirmed breach.

VULONE research mentioning Core

The Australian Behind Doxbin: Identifying Unindicted Co-Conspirator CC-1 AKA KTFor years, "KT" ruled Doxbin from the shadows, until a Minecraft griefer's forgotten footprints, a breached email, and one arrogant GitHub p Cyberleek: Mapping the Actor Behind the Leak The Cyberleek attribution has been questioned after an analysis of the evidence surrounding the GnomodelincuenT claim. This report examines Flotilla: Anatomy of an Undocumented Cross-Platform Covert-Browser Botnet Delivered Through the GCleaner ChannelAn undocumented Turkish-language malware platform running a covert Electron browser botnet on Windows and arm64 agents on macOS, sharing one QUAKE3, The XSS Moderator Who Wrote REvil

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Victim claims are collected from leak sites and enrichment partners (ransomware.live, RansomLook) and represent the group's own assertions, not confirmed breaches. Profile last updated 16 September 2026. Questions or corrections: [email protected].