Malicious PowerShell Spawned by File Explorer via FileFix Social Engineering (via process_creation)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-10-04
Updated
2026-10-04

ATT&CK techniques

Execution
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Persistence

  5. Priv Esc

  6. Defense Evasion

  7. Cred Access

  8. Discovery

  9. Lateral Movement

  10. Collection

  11. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects explorer.exe launching PowerShell, which occurs when a user pastes a disguised command into the File Explorer address bar under the FileFix social engineering technique. Attackers trick victims into executing this command to download and run an Interlock RAT or infostealer payload.

Related detections9 linkedT1059.001 — drag to rearrange
Suspicious Web Browser Spawning Scripting or Command Interpreter (via process_creation)
Windows Process Execution Triggered from WebDAV LNK Paths
Suspicious Scheduled Task Creation in Public Writable Directory via schtasks (via process_creation)
Suspicious Base64 Encoded PowerShell Command Linked to Chinese APT Techniques
Suspicious Scheduled Task Executing Payload from AppData
Malicious PowerShell Runtime Loaded Outside PowerShell Host
Suspicious PowerShell Harvesting RDP Logon Events via Get-WinEvent
Suspicious PowerShell Web Request to oastify Out-of-Band Domain
Suspicious PowerShell Execution of Untitled1 Script From ProgramData
Malicious PowerShell Spawned by File Explorer via FileFix Social Engineering (via process_creation)
Pivot detection · T1059.001 · 9 related

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