Suspicious Rundll32 Execution of PhotoViewer.dll ImageView_Fullscreen (via process_creation)

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects rundll32 invoking the ImageView_Fullscreen export of PhotoViewer.dll, a living off the land technique the Italian region infostealer uses to proxy execution of its payload. The legacy Windows Photo Viewer export is repurposed to run attacker code under a trusted system binary.

Reporting behind it

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Suspicious Rundll32 Execution of PhotoViewer.dll ImageView_Fullscreen (via process_creation)

Pivot detection · T1218.011 · 9 related

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