Overview
Kazu is an emerging ransomware group active since September 2025 that employs double-extortion tactics, targeting government, healthcare, and financial organizations primarily in Southeast Asia, the Middle East, and Latin America, with notable claimed breaches including Dubai's Ports, Customs and Free Zone Corporation with 1.94 TB exfiltrated.
- First tracked: 2025-11-11
- Discussed in our reports: Kuwait · Saudi Arabia · UAE
Geography: origin and targets
No public attribution of origin. Lines are drawn only where public reporting places the operators; flags show where the group has claimed victims, sized by number of claims.
United States of America5
Canada2
Brazil2
Mexico2
Colombia2
Argentina1
Pakistan1
Spain1
New Zealand1
Saudi Arabia1
Exploited vulnerabilities
None recorded in the sources we reviewed.
ATT&CK techniques
None recorded in the sources we reviewed.
Tools
None recorded in the sources we reviewed.
Leak-site infrastructure
| Title | Type | Address (defanged) | Seen online at snapshot |
|---|---|---|---|
| — | DLS | kazu7japbm72xaxqnjhajlvkuo4czf2q5ye7ucc4fmyjpgunc6ggezyd[.]onion | No |
| — | DLS | kazu2x7vux5gmbrrqnbujbpe5njyqua5ulixubfcf64qae7qbvce4gqd[.]onion | No |
| — | DLS | kazuuyscnd6emsrzkpelzxgxvro2wgrngku4g7btuunsandnjv5f52ad[.]onion | No |
| Ransom - KAZU | DLS | 6czlbd2jfiy6765fbnbnzuwuqocg57ebvp3tbm35kib425k4qnmiiiqd[.]onion | Yes |
| — | DLS | kazusemtykpxnnosg3gp56spcdkg7tro6ozei7ikamdgnwpwpbwagbyd[.]onion | No |
Sources and caveats
Group descriptions, ATT&CK mappings, tools and leak-site locations come from public ransomware tracking projects, including ransomware.live and Crocodyli. Exploited vulnerabilities come from the Ransomware-Vulnerability-Matrix by BushidoUK (licensed CC BY 4.0), supplemented where a group profile there is newer than the data we hold. Each CVE links to its original research source. Technical text is shown in English as published. Leak-site addresses are defanged and shown for blocking and detection; do not visit them. Nothing here is verified by ClairSec_ against a specific incident.
Data snapshot: 2026-10-11