Suspicious EACoreServer Masquerading as WindowsUpdate Executable (via process_creation)

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1036.004Masquerade Task or Service
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a process launched as WindowsUpdate.exe whose original file name is EACoreServer.exe, the renaming trick a Chinese APT used to disguise a legitimate signed binary as a Windows update component for sideloading. The mismatch between the on disk name and the embedded original name exposes the masquerade, distinguishing it from genuine update processes.

Reporting behind it

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Suspicious EACoreServer Masquerading as WindowsUpdate Executable (via process_creation)

Pivot detection · T1036.004 · 9 related

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