Lamashtu
Since Apr 13, 2026, Lamashtu has listed 79 organizations on its leak site.
Listings per month
- Total listings
- 79
- First listing
- Apr 13, 2026
- Latest listing
- Oct 24, 2026
- MITRE ATT&CK techniques
- 0
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.
It posted 79 listings in the last 12 months; the busiest month was October 2026 (25 listings).
Most targeted country: Germany, with 25 listings (32% of the total).
Most targeted sector: Manufacturing, with 25 listings (32% of the total).
Showing 10 of 79 results
Published reports on this actor:
Source: MISP Galaxy, Malpedia.
What does a ransomware group do?
Ransomware groups break into corporate networks, move data out and encrypt systems. If the ransom is not paid, they list the organization on a leak site and threaten to publish the data.
What should you do if your organization is listed on a leak site?
- Record the listing and any published sample files; do not visit the leak site from the corporate network.
- Isolate affected systems and preserve logs without deleting them.
- Determine which data left the organization; if personal data is involved, review notification obligations with your legal team.
- Make any decision about the ransom demand together with legal, management and incident response.
- Do not bring systems back online before the attacker’s entry point is closed.
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