Suspicious Silver Fox Backdoor Execution via pythonw appclient Module (via process_creation)

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.006Python
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects pythonw.exe running the appclient module, the interpreter based execution path of the Silver Fox ABCDoor backdoor that hides its window from the user. Running the implant as a Python module conceals malicious activity behind a legitimate interpreter. Detecting this invocation surfaces backdoor execution on the host.

Reporting behind it

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Suspicious Silver Fox Backdoor Execution via pythonw appclient Module (via process_creation)

Pivot detection · T1059.006 · 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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