Overview
Lamashtu is an extortion group that first appeared in April 2026, claiming attacks against organizations in France, Romania, and Thailand across energy, pharmaceutical, and film sectors; it has not yet been confirmed as operating actual file-encrypting ransomware rather than pure data-theft extortion.
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.
Germany9
France5
Malaysia5
Mexico4
Spain3
Italy3
Thailand3
United States of America2
Egypt2
India2
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 |
|---|---|---|---|
| — | Chat | 7jhbjbyb3zp5ziqqn6kikfrgyjapd4wusseuu753ddknr37apqrxnpid[.]onion | No |
| Lamashtu.Blog | DLS | lamashtux5j74mcm7lwwgn5yrvuwtrpxjoyendif3v3hrztjesfoyayd[.]onion | Yes |
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