Detection rules › Sigma
Suspicious Windows Defender Folder Exclusion Added Via Reg.EXE
Detects the usage of "reg.exe" to add Defender folder exclusions. Qbot has been seen using this technique to add exclusions for folders within AppData and ProgramData.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Defense Evasion | T1562.001 Impair Defenses: Disable or Modify Tools |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
| Security-Auditing | 4688 | A new process has been created. |
Stages and Predicates
Stage 1: selection
or:
CommandLine|contains: 'SOFTWARE\Microsoft\Microsoft Antimalware\Exclusions\Paths'
CommandLine|contains: 'SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths'
CommandLine|contains: '/d '
CommandLine|contains: '/t '
CommandLine|contains: '/v '
CommandLine|contains: 0
CommandLine|contains: 'ADD '
CommandLine|contains: 'REG_DWORD '
Image|endswith: '\reg.exe'
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 |
|