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DeadLock is a ransomware threat actor active since at least mid-2025 and associated in reporting with Russian-origin operators. The group conducts double-extortion operations, combining file encryption with data theft and the threat of public disclosure through a leak site. Reported incidents indicate that DeadLock has targeted organizations across multiple countries and sectors, including health care, manufacturing, government, professional services, transportation, energy-related businesses, and information technology service providers. Observed victimology shows a broad, opportunistic targeting pattern rather than a narrowly specialized vertical focus. Confirmed victims and claimed victims include biopharmaceutical and clinical research organizations, industrial and manufacturing firms, transportation providers, trade and professional associations, public-sector entities, and infrastructure-adjacent companies. Activity reported in 2026 includes a notable concentration of Italian victims, including a one-day burst of claims against multiple organizations in Italy. DeadLock’s operations are characterized by pre-encryption data exfiltration followed by extortion pressure, and reporting describes the group as publishing victims on a dark-web leak site when negotiations fail or as additional coercion. In some cases, the actor has been linked to theft of highly sensitive medical and professional information, increasing the leverage of its extortion model. DeadLock has also been described as encrypting files and appending a distinctive extension associated with the group’s ransomware. Known aliases in the available reporting are limited to DeadLock and capitalization variants such as Deadlock. The actor is best understood as a financially motivated ransomware and data-theft extortion group with broad international reach.
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Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
24 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
4 malware families attributed to this actor across reporting.
1 CVE this actor has used in observed campaigns. 1 of them exploited in the wild.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Named in the weekly raw data as a ransomware group with 10 claimed attacks.
Ransomware group conducting a double-extortion attack against Diater and threatening to leak sensitive patient and healthcare professional records.
Ransomware operations targeting a biopharmaceutical company, using double extortion by exfiltrating data before encrypting files and pressuring the victim.
Conducting a ransomware attack against AHENK lab in Turkey.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.