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UNC3819 is a suspected Chinese cyber espionage activity cluster tracked for likely exploitation of the Microsoft Support Diagnostic Tool vulnerability CVE-2022-30190, also known as Follina, in May 2022. The cluster targeted organizations in Belarus and Russia and used lure content related to the war in Ukraine in at least some observed samples. Its activity fits a broader pattern of multiple suspected Chinese espionage clusters leveraging the same zero-day during the early 2022 Follina exploitation wave, suggesting shared logistics or centralized exploit distribution among related intrusion sets. High-confidence reporting links UNC3819 to targeted intrusion activity centered on malicious document-based initial access and follow-on code execution for espionage purposes. Publicly supported details beyond this initial exploitation activity remain limited.
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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 CVE this actor has used in observed campaigns. 1 of them exploited in the wild.
1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.