Lamashtu is a financially motivated data-theft and extortion group that emerged in mid-April 2026, operating a Tor-hosted leak site (Lamashtu[.]Blog) with countdown timers, structured Breach Impact Reports, and proof-of-life thumbnails to pressure victims. The group has claimed 17+ victims across France, Romania, Thailand, Malaysia, Egypt, and the UAE within its first weeks of activity, targeting energy, pharmaceutical, retail, hospitality, and film sectors, with confirmed exfiltration totaling 760+ GB.