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APT27 is a China-linked cyber-espionage threat actor also known as Emissary Panda, Iron Tiger, LuckyMouse, and Threat Group-3390. The group has conducted intelligence-collection intrusions and has been associated with the HyperBro malware family. Its observed tradecraft includes use of HTTP command-and-control, PowerShell execution, DLL side-loading through legitimate security-software executables, Windows Registry modification, and deployment of credential-collection tooling. APT27 operators have also staged post-compromise tools on previously compromised web infrastructure and used keylogging and credential logging, including activity targeting Microsoft Exchange servers.
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.
66 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
55 malware families attributed to this actor across reporting.
50 additional families tracked in Mallory.
28 CVEs this actor has used in observed campaigns. 28 of them exploited in the wild.
CVE-2021-26855 (CVSS 9.1) is a server-side request forgery (SSRF) vulnerability in Exchange that allows the attacker to send arbitrary HTTP requests and authenticate as the Exchange server.
Warlock and other groups exploited newly discovered vulnerabilities in internet-exposed, unpatched on-premises Microsoft SharePoint servers. The report identifies the SharePoint ToolShell vulnerability as central to the campaign.
CVE-2021-27065 (CVSS 7.8) is a post-authentication arbitrary file write vulnerability in Exchange. If the threat actor first authenticates with the Exchange server they could then use this vulnerability to write a file to any path on the server.
Microsoft has detected a 0-day remote code execution exploit being used to attack SolarWinds Serv-U FTP software in limited and targeted attacks. The vulnerability being exploited is CVE-2021-35211, which was recently patched by SolarWinds. The vulnerability exists in Serv-U’s implementation of the Secure Shell (SSH) protocol.
CVE-2025-53771 : Type: Input Validation / Path Traversal Used to overwrite or plant files in sensitive directories, aiding persistence.
23 more CVEs tied to this actor tracked in Mallory.
483 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.
Observed exploiting the referenced SharePoint vulnerabilities against internet-facing SharePoint servers.
Listed in the detection's Annotations section.
Mentioned only as an annotation associated with a detection for PYTHONPATH modification during package installation; no specific Threat Group-3390 activity is described.
Threat Group-3390 is listed only in the detection's annotations.
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.