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UNC4889 is a North Korean state-backed threat actor associated with aggressive targeting of cloud environments in the second half of 2025. The actor has been linked to intrusions into breached cloud systems that resulted in the theft of millions of U.S. dollars worth of cryptocurrency, indicating an operational focus on financially motivated cyber activity aligned with North Korean revenue-generation objectives. Reported activity ties UNC4889 to cloud-focused operations rather than traditional on-premises intrusion sets. The actor has been associated with exploitation of cloud environments compromised through software vulnerabilities and other cloud attack paths, and with post-compromise theft of cryptocurrency assets from victim environments. Available high-confidence reporting supports characterization of UNC4889 as a North Korean state-backed cluster engaged in financially motivated operations against cloud infrastructure. Publicly available facts in this context do not establish additional confirmed aliases, sub-groups, victim-country specificity, or a broader verified sectoral victimology beyond cloud-hosted cryptocurrency theft from compromised environments.
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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.
Geographies tied to known operations.
Attributed origin per open-source reporting.
1 distinct technique observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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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.
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