Suspicious Certreq Command to Download

 1title: Suspicious Certreq Command to Download
 2id: 4480827a-9799-4232-b2c4-ccc6c4e9e12b
 3status: test
 4description: Detects a suspicious certreq execution taken from the LOLBAS examples, which can be abused to download (small) files
 5references:
 6    - https://lolbas-project.github.io/lolbas/Binaries/Certreq/
 7author: Christian Burkard (Nextron Systems)
 8date: 2021-11-24
 9modified: 2022-06-13
10tags:
11    - attack.command-and-control
12    - attack.t1105
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_img:
18        - Image|endswith: '\certreq.exe'
19        - OriginalFileName: 'CertReq.exe'
20    selection_cli:
21        CommandLine|contains|all:
22            - ' -Post '
23            - ' -config '
24            - ' http'
25            - ' C:\windows\win.ini '
26    condition: all of selection*
27fields:
28    - CommandLine
29    - ParentCommandLine
30falsepositives:
31    - Unlikely
32level: high