Suspicious Keylog and Screenshot Files in windows-cache Directory (OtterCookie)

ATT&CK techniques

Cred Access → Collection

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1056.001Keylogging
Discovery
Lateral Movement
Collection
- T1056.001Keylogging
- T1113Screen Capture
C2
Exfiltration
Impact

What it detects

This rule detects creation of the collection artifacts 1.tmp and 2.jpeg inside a windows-cache directory, where the OtterCookie module stores keystroke logs and screenshots before exfiltration. These fixed staging paths and filenames are distinctive to the malware. Their appearance indicates active input capture and screen collection.

Reporting behind it

Related detections9 linkedT1056.001 — drag to rearrange

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Suspicious Keylog and Screenshot Files in windows-cache Directory (OtterCookie)

Pivot detection · T1056.001 · 9 related

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

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