Malicious Inhibit System Recovery via bcdedit Boot Policy Change by Chaos Ransomware (via process_creation)

ATT&CK techniques

Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1490Inhibit System Recovery

What it detects

This rule detects Chaos C++ ransomware disabling Windows recovery by running bcdedit to ignore all boot failures and to turn off the recovery environment prior to encryption. These bcdedit modifications remove the user ability to recover the system. They are a reliable pre encryption indicator.

Reporting behind it

Related detections9 linkedT1490 — drag to rearrange

Malicious Inhibit System Recovery via Native Backup and Shadow Copy Deletion (via process_creation)

Malicious Shadow Copy Deletion and Recovery Inhibition via process_creation

Malicious Shadow Copy Deletion and Boot Recovery Tampering via Process Creation

Malicious Boot Configuration Set to Safe Mode with Networking via bcdedit

Shadow Copy Deletion via Vssadmin to Inhibit Recovery

Suspicious Symlink Evaluation Enabled via fsutil

Malicious Mass Hyper-V Virtual Machine Shutdown via PowerShell by Kraken Ransomware

Suspicious Shadow Copy Deletion via Vssadmin by Kraken Ransomware

Malicious Volume Shadow Copy Deletion via vssadmin or WMIC

Malicious Inhibit System Recovery via bcdedit Boot Policy Change by Chaos Ransomware (via process_creation)

Pivot detection · T1490 · 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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