Detection rules › Sigma
Boot Configuration Tampering Via Bcdedit.EXE
Detects the use of the bcdedit command to tamper with the boot configuration data. This technique is often times used by malware or attackers as a destructive way before launching ransomware.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Impact | T1490 Inhibit System Recovery |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
Stages and Predicates
Stage 1: all of selection_img
or:
Image|endswith: '\bcdedit.exe'
OriginalFileName: bcdedit.exe
Stage 2: all of selection_set
CommandLine|contains: set
Stage 3: all of selection_cli
or:
CommandLine|contains: bootstatuspolicy
CommandLine|contains: ignoreallfailures
CommandLine|contains: no
CommandLine|contains: recoveryenabled
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
CommandLine | match |
|
Image | ends_with |
|
OriginalFileName | eq |
|