BitLocker Configuration Allowing Encryption Without TPM via FVE Registry (via registry_set)

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 FVE policy keys that enable advanced startup and BitLocker encryption without a TPM, the configuration ShrinkLocker writes so it can encrypt a machine and force a password prompt at boot. Adversaries leverage these policy values to weaponize BitLocker against a victim, making early detection critical for stopping encryption before drives are locked.

Reporting behind it

Related detections9 linkedT1486 — drag to rearrange

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BitLocker Configuration Allowing Encryption Without TPM via FVE Registry (via registry_set)

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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