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UNC5325 is a suspected China-nexus cyberespionage threat actor that compromises Ivanti Connect Secure VPN appliances through zero-day exploitation. Its exploitation of CVE-2024-21893 was observed as early as January 19, 2024. The actor chained this server-side request forgery vulnerability with the command injection vulnerability CVE-2024-21887 to obtain unauthenticated access, including on appliances protected by Ivanti's initial mitigation. UNC5325 uses living-off-the-land techniques, open-source code, custom malware, and modifications to appliance settings to evade detection and maintain access. Its observed malware includes LITTLELAMB.WOOLTEA, PITSTOP, PITDOG, PITJET, and PITHOOK. The actor attempted to establish persistence across system upgrades, patches, and factory resets using LITTLELAMB.WOOLTEA; observed attempts failed because the malware did not account for an encryption-key mismatch.
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.
Geographies tied to known operations.
Attributed origin per open-source reporting.
4 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
6 malware families attributed to this actor across reporting.
1 additional family tracked in Mallory.
2 CVEs this actor has used in observed campaigns. 2 of them exploited in the wild.
Mandiant's previous blog post, Cutting Edge, Part 3: Investigating Ivanti Connect Secure VPN Exploitation and Persistence Attempts, details zero-day exploitation of CVE-2024-21893 and CVE-2024-21887 by a suspected China-nexus espionage actor that Mandiant tracks as UNC5325.
UNC5330 has been observed chaining CVE-2024-21893 and CVE-2024-21887 to compromise Ivanti Connect Secure VPN appliances as early as Feb. 2024. Post-compromise activity by UNC5330 includes deployment of PHANTOMNET and TONERJAM.
3 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.