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UNC3500 is a suspected China-nexus intrusion cluster associated with exploitation of CVE-2021-44228 for initial access. The actor has targeted organizations in the education and telecommunications sectors and has been observed establishing persistence by deploying VPN and HTTPS server functionality that can operate as a backdoor after compromise. Reported activity includes use of SoftEther VPN components to create covert remote-access infrastructure on victim systems, enabling durable access while blending with legitimate administrative or networking software. UNC3500’s tradecraft reflects a focus on initial exploitation, persistence, and post-compromise remote access rather than overt disruption or extortion. The actor is assessed as a suspected Chinese threat actor.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
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.
3 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
1 malware family attributed to this actor across reporting.
1 CVE this actor has used in observed campaigns. 1 of them exploited in the wild.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.