Suspicious Lock Screen Image Path Modification via Registry

ATT&CK techniques

Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1486Data Encrypted for Impact

What it detects

This rule detects modification of the Windows lock screen image path registry value, a personalization change Qilin ransomware applied to display its ransom messaging. While policy tooling can set this value, an unexpected change alongside other intrusion signals indicates ransomware defacement.

Reporting behind it

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Suspicious Lock Screen Image Path Modification via Registry

Pivot detection · T1486 · 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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