LeakyStealer Persistence via EdgeUpdateCore Run Key Masquerade (via registry_set)

ATT&CK techniques

Persistence → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1547.001Registry Run Keys / Startup Folder
Priv Esc
- T1547.001Registry Run Keys / Startup Folder
Defense Evasion
- T1036.005Match Legitimate Resource Name or Location
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a Run key named EdgeUpdateCore that points to a MicrosoftEdgeUpdateCore executable staged under the user AppData directory, the persistence mechanism used by the LeakyInjector and LeakyStealer duo to survive reboot while masquerading as a Microsoft Edge update component. Adversaries mimic trusted update tooling so the autorun entry blends into normal software update activity.

Reporting behind it

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LeakyStealer Persistence via EdgeUpdateCore Run Key Masquerade (via registry_set)

Pivot detection · T1036.005 · 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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