.. /wuauclt.exe
Star

Windows Update Client

Paths:

C:\Windows\System32\wuauclt.exe
C:\Windows\UUS\amd64\wuauclt.exe

Resources:

https://dtm.uk/wuauclt/

Acknowledgements:

David Middlehurst (@dtmsecurity)

Detections:

Sigma: https://github.com/SigmaHQ/sigma/blob/683b63f8184b93c9564c4310d10c571cbe367e1e/rules/windows/network_connection/net_connection_win_wuauclt_network_connection.yml
Sigma: https://github.com/SigmaHQ/sigma/blob/683b63f8184b93c9564c4310d10c571cbe367e1e/rules/windows/process_creation/proc_creation_win_lolbin_wuauclt.yml
Sigma: https://github.com/SigmaHQ/sigma/blob/683b63f8184b93c9564c4310d10c571cbe367e1e/rules/windows/process_creation/proc_creation_win_wuauclt_execution.yml
IOC: wuauclt run with a parameter of a DLL path
IOC: Suspicious wuauclt Internet/network connections

Execute

Loads and executes DLL code on attach.
```
wuauclt.exe /UpdateDeploymentProvider {PATH_ABSOLUTE:.dll} /RunHandlerComServer
```
Use case
Execute dll via attach/detach methods

Privileges required
User

Operating systems
Windows 10

ATT&CK® technique
T1218
Tags
Execute: DLL