1type: trigger
2name: sigmahq/proc_creation_win_bcdedit_boot_conf_tamper
3description: |
4  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.
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\bcdedit.exe' || evt.Parsed.OriginalFileName == 'bcdedit.exe') && evt.Parsed.CommandLine contains 'set' && (evt.Parsed.CommandLine contains 'bootstatuspolicy' && evt.Parsed.CommandLine contains 'ignoreallfailures' || evt.Parsed.CommandLine contains 'recoveryenabled' && evt.Parsed.CommandLine contains 'no'))
7blackhole: 2m
8#status: stable
9labels:
10  service: windows
11  confidence: 2
12  spoofable: 0
13  classification:
14   - attack.t1490
15
16  label: "Boot Configuration Tampering Via Bcdedit.EXE"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24