Suspicious CredSSP Encryption Oracle Remediation Weakening via Registry (via registry_set)

ATT&CK techniques

Persistence → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1112Modify Registry
Priv Esc
Defense Evasion
- T1112Modify Registry
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects setting the CredSSP AllowEncryptionOracle policy value to 2 (Vulnerable), a defense-weakening change used by the Scarab group to enable RDP connections to unpatched hosts. Lowering this protection re-exposes systems to the CVE-2018-0886 encryption oracle and signals attacker lateral-movement preparation.

Reporting behind it

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Suspicious CredSSP Encryption Oracle Remediation Weakening via Registry (via registry_set)

Pivot detection · T1112 · 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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