FalseFont Backdoor Persistence via Registry Run Key Pointing to User-Directory Binaries (via registry_set)

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1547.001Registry Run Keys / Startup Folder
Priv Esc
- T1547.001Registry Run Keys / Startup Folder
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a registry Run key value whose data points to the host.exe, broker.exe, or System.exe binaries dropped into user-profile directories by the FalseFont backdoor used by the Peach Sandstorm threat actor. Adversaries register these autostart entries to survive reboot, making detection useful for catching persistence of the espionage implant.

Reporting behind it

Related detections9 linkedT1547.001 — drag to rearrange

Suspicious Internet Shortcut URL File Registered for Run Key Persistence (via registry_set)

Malicious Run Key Persistence Named SystemAgentService

Suspicious Run Key Persistence Pointing to ProgramData Executable (via registry_set)

Suspicious Run Key Persistence Pointing to WScript via PhantomVAI Loader (via registry_set)

Suspicious Run Key Persistence Named Updater

Suspicious Run Key Persistence Executing VBScript as WindowsSecurityCheck

Suspicious RunOnce Persistence Pointing to User AppData

Malicious FalseFont Backdoor Run Key Persistence from AppData (via registry_set)

Malicious Registry Run Key Persistence via AHealthDB by Stately Taurus

FalseFont Backdoor Persistence via Registry Run Key Pointing to User-Directory Binaries (via registry_set)

Pivot detection · T1547.001 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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