Detection rules › Sigma
Proxy Execution Via Wuauclt.EXE
Detects the use of the Windows Update Client binary (wuauclt.exe) for proxy execution.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Defense Evasion | T1218 System Binary Proxy Execution |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
Stages and Predicates
Stage 1: all of selection_img
or:
Image|endswith: '\wuauclt.exe'
OriginalFileName: wuauclt.exe
Stage 2: all of selection_cli
CommandLine|contains: RunHandlerComServer
CommandLine|contains: UpdateDeploymentProvider
Stage 3: not 1 of filter_main_*
or:
CommandLine|contains: ':\Windows\WinSxS\'
CommandLine|contains: '\UpdateDeploy.dll /ClassId '
CommandLine|contains: ' /UpdateDeploymentProvider UpdateDeploymentProvider.dll '
CommandLine|contains: ' wuaueng.dll '
CommandLine|contains: ':\Windows\UUS\Packages\Preview\amd64\updatedeploy.dll /ClassId'
CommandLine|contains: ':\Windows\UUS\amd64\UpdateDeploy.dll /ClassId'
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 |
|