Suspicious Microsoft Edge Unpacked Extension Load via UNC6692 Edgecution

ATT&CK techniques

Persistence

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1176Software Extensions
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects Microsoft Edge being launched with the load-extension flag pointing at an unpacked extension directory. UNC6692 abuses this Edgecution technique to sideload a malicious browser extension for persistence and data access after Quick Assist intrusion. Command-line loading of unpacked extensions is rare outside development and warrants review.

Reporting behind it

Related detections8 linkedT1176 — drag to rearrange

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Malicious Chrome Extension Sideload via --load-extension from User-Writable Path (via process_creation)

Suspicious Edgecution Malicious Extension Load via Headless Edge (via process_creation)

Malicious Chrome Relaunch Hijack by FlutterShell Backdoor on macOS (via process_creation)

Windows: Chromium-Based Browser Launched via Script Host with --load-extension

Windows Chromium-Based Browser Launched With --load-extension Flag

Windows ChromeLoader Execution via Scheduled Task and Hidden PowerShell Launch

Suspicious Microsoft Edge Unpacked Extension Load via UNC6692 Edgecution

Pivot detection · T1176 · 8 related

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