Deadlock emerged on tracking systems on June 15, 2026, and within 48 hours had claimed 75 victims, an unusually compressed burst that suggests either a mass-publication event from a backlog of intrusions or a coordinated initial disclosure strategy rather than a rolling campaign. Sector and country metadata is absent across all claimed victims, making geographic or vertical concentration difficult to assess at this stage, though the victim name sample spans apparent hospitality (Hornavan Hotell), chemicals (Zhangjiagang Fortune Chemical), paper manufacturing (CH Paper), and telecommunications or communications services (TeleFinity), indicating broad-scope targeting rather than niche specialization. No MITRE ATT&CK profile is yet catalogued for Deadlock specifically, so technique-level characterization relies on the victim pattern alone; the sheer volume of day-one claims is consistent with groups that pre-stage data exfiltration across multiple victims before establishing a leak site, then post simultaneously to maximize pressure. The group carries no on-file description, and its operational history prior to tracker visibility is unknown.