Suspicious RDP Bitmap Cache Temp Files Written by mstsc in Rogue RDP Campaign (via file_event)

ATT&CK techniques

Collection

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
- T1005Data from Local System
C2
Exfiltration
Impact

What it detects

This rule detects mstsc.exe writing _TS prefixed temporary files, the bitmap cache artifacts produced when a victim connects to a rogue RDP server delivering redirected remote applications. Presence of these client cache files corroborates outbound rogue RDP sessions used for data access.

Reporting behind it

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Suspicious RDP Bitmap Cache Temp Files Written by mstsc in Rogue RDP Campaign (via file_event)

Pivot detection · T1005 · 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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