Suspicious Download to Windows appcompat Directory via PowerShell

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects PowerShell using Invoke-WebRequest to write an executable into the Windows appcompat directory as observed after Triofox CVE-2025-12480 exploitation. Attackers stage payloads such as SAgentInstaller.exe in unusual system paths to evade attention.

Reporting behind it

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Suspicious Download to Windows appcompat Directory via PowerShell

Pivot detection · T1059.001 · 9 related

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