D
CyberChina

Threat Group-3390

Suspected state-linked cyber threat groupTrackedPending verification

Also known as: Earth Smilodon, TG-3390, Emissary Panda, BRONZE UNION, APT27, Iron Tiger, LuckyMouse, Linen Typhoon

CyberCHN
Identification silhouette. Not drawn to scale between entries.
Fact cardConfidence · Source
System
TypeSuspected state-linked cyber threat group
Alternative designationsEarth Smilodon, TG-3390, Emissary Panda, BRONZE UNION, APT27, Iron Tiger, LuckyMouse, Linen Typhoon
ProliferationOrigin country only
Active since2010At least 2010Med[1]
MITRE ATT&CK IDG0027High[1]
Capabilities
ATT&CK techniques used57ATT&CK v20.1High[1]
Malware and toolsASPXSpy, certutil, China Chopper, Clambling, Cobalt Strike, gh0st RAT, gsecdump, HTTPBrowser, HyperBro, Impacket, ipconfig, Mimikatz, NBTscan, Net, netstat, Pandora, PlugX, pwdump, RCSession, Systeminfo and 4 more24 malware and tool entries linked in ATT&CKHigh[1]
Attribution and activity
Attributed sponsorChinese groupMed[1]
TargetsThreat Group-3390 is a Chinese threat group that has extensively used strategic Web compromises to target victims.Med[1]
Notes
Threat Group-3390 is a Chinese threat group that has extensively used strategic Web compromises to target victims. The group has been active since at least 2010 and has targeted organizations in the aerospace, government, defense, technology, energy, manufacturing and gambling/betting sectors. Description adapted from MITRE ATT&CK®, © The MITRE Corporation, used under the ATT&CK Terms of Use.
Summary

Threat Group-3390 is a Chinese threat group that has extensively used strategic Web compromises to target victims. The group has been active since at least 2010 and has targeted organizations in the aerospace, government, defense, technology, energy, manufacturing and gambling/betting sectors.

Draft entry. Values come from the cited public sources and are awaiting editor verification.
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Operators
China
Sources
  1. Threat Group-3390, Group G0027, MITRE ATT&CK
    Published/updated 2026-07-31 · Tier 2 · checked 2026-11-08
Change log
  • 2026-11-08 Entry created from MITRE ATT&CK Enterprise v20.1 (group G0027)