Detection: BCDEdit Failure Recovery Modification
Description
This search looks for flags passed to bcdedit.exe modifications to the built-in Windows error recovery boot configurations. This is typically used by ransomware to prevent recovery.
Annotations
No annotations available.
Implementation
To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the Endpoint_Processess datamodel.
Known False Positives
Administrators may modify the boot configuration.
Associated Analytic Story
Risk Based Analytics (RBA)
| Risk Message | Risk Score | Impact | Confidence |
|---|---|---|---|
| An instance of $actor_process_file_name$ spawning $process_file_name$ was identified on endpoint $device_hostname$ by user $actor_user_name$ attempting disable the ability to recover the endpoint. | 80 | 100 | 80 |
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
References
Version: 4