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UNC3886 is a China-nexus cyber-espionage threat cluster tracked by Mandiant. The group is known for targeting high-value, low-visibility infrastructure, particularly VMware ESXi and vCenter environments, network edge devices, and Fortinet management appliances. Its operations employ platform-specific backdoors, rootkits, traffic-redirection utilities, and VMware VMCI-based channels to establish persistent and covert access, evade conventional network monitoring, and execute commands in guest environments. UNC3886 has used publicly available REPTILE and MEDUSA rootkits and has conducted credential collection from TACACS+ infrastructure. It has also deployed THINCRUST on Fortinet management products, using native appliance API mechanisms for covert command-and-control, and used TABLEFLIP to redirect traffic and regain access to affected appliances. Fire Ant is a China-linked espionage operation assessed to strongly overlap with UNC3886 based on targeting, tooling, and operational tradecraft, though this relationship has not been conclusively attributed. Singapore publicly identified UNC3886 as targeting high-value strategic targets and vital infrastructure in the country. The actor's activity is consistent with intelligence collection, durable access, and positioning within trusted infrastructure that can facilitate access to connected higher-value networks.
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.
46 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
24 malware families attributed to this actor across reporting.
19 additional families tracked in Mallory.
24 CVEs this actor has used in observed campaigns. 24 of them exploited in the wild.
After compromising the hypervisor, the Fire Ant actors exploited another vulnerability — CVE-2023-20867 — to execute commands inside the guest virtual machines (VMs) without the required authentication. CVE-2023-20867 is an authentication bypass flaw that was also exploited by UNC3886 and disclosed by Mandiant researchers in 2023.
Juniper vydala bezpečnostné aktualizácie pre svoj sieťový operačný systém Junos OS, ktoré opravujú aktívne zneužívanú zraniteľnosť. CVE-2025-21590 by lokálny útočník s prístupom k shell-u mohol zneužiť na obídenie bezpečnostného mechanizmu Veriexec, vykonanie škodlivého kódu a získanie úplnej kontroly nad systémom.
Sygnia's investigation into the cyberespionage campaign found that Fire Ant actors exploited a nearly two-year-old vulnerability in VMware vCenter, tracked as CVE-2023-34048, to gain initial access to targeted organizations.
UNC3886 has used zero-day vulnerabilities CVE-2022-41328 against FortiOS and CVE-2023-20867 and CVE-2023-34048 against VMware vCenter.
The abuse of CVE-2022-22948, on the other hand, has been attributed by Google-owned Mandiant to a China-nexus cyber espionage group known as UNC3886...
19 more CVEs tied to this actor tracked in Mallory.
60 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
China-based espionage activity targeting Cisco IOS XR routers, TACACS authentication servers, hypervisors, Linux management hosts, and other management infrastructure to gain network visibility, harvest credentials, establish durable access, and pivot into connected high-value and critical-infrastructure environments.
Chinese espionage group potentially linked to Fire Ant activity; described as previously targeting VMware infrastructure and network equipment.
Conducting network-infrastructure intrusion operations against enterprise routing, authentication, and management systems. The actor deploys router and Linux implants for persistence, hides GRE tunnels and command output, captures and exfiltrates PCAP data, intercepts TACACS authentication sessions, harvests credentials, and uses compromised hosts for scanning, pivoting, and access into connected high-value environments.
Conducting a long-running intrusion campaign against trusted enterprise and critical-infrastructure network-management layers, including hypervisors, routers, authentication servers, and Linux management hosts. The actor harvests credentials, gathers intelligence, establishes durable access, suppresses or manipulates logs, and can observe or redirect communications.
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.