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Antlion is a China-linked, state-backed advanced persistent threat actor associated with cyber-espionage operations. The group has targeted organizations in Taiwan, particularly financial institutions and manufacturing companies, and has been assessed as active since at least 2011. A notable campaign during 2020 and 2021 lasted more than 18 months, with intrusions in some victim environments persisting for roughly 175 to 250 days while remaining undetected. Antlion is known for deploying the custom backdoor xPack, a .NET loader that retrieves encrypted payloads and provides broad post-compromise capability. Reported functionality includes system and process discovery, remote command execution, delivery of additional malware and tools, credential dumping, and staging of collected data for exfiltration. The actor has also used multiple custom C++ loaders and auxiliary tools, including SMB session enumeration and file-transfer utilities, alongside legitimate administration tools and living-off-the-land techniques. Observed tradecraft includes suspected exploitation of a web application vulnerability for initial access, privilege escalation through exploitation of CVE-2019-1458, remote task scheduling for execution, credential theft from compromised systems, repeated relaunch of malware to harvest additional credentials, and lateral movement across victim networks. Antlion has also used Kerberos golden ticket tooling derived from Mimikatz, PowerShell, WMIC, PsExec, ProcDump, and access to LSASS in support of stealthy long-term operations. The actor's operational pattern, victimology, and dwell time are consistent with intelligence collection against Taiwanese organizations.
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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.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
18 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
2 malware families 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.
Conducting a long-running espionage campaign against Taiwanese organizations, especially financial institutions, using the xPack backdoor, custom loaders, remote access tools, credential dumping, command execution, and living-off-the-land techniques.
Chinese state-backed cyber-espionage actor using the custom xPack backdoor and other custom tooling against financial and manufacturing organizations in Taiwan, maintaining long-term stealthy access, dumping credentials, moving laterally, and staging data for exfiltration.
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.