Powershell Executed From Headless ConHost Process

 1title: Powershell Executed From Headless ConHost Process
 2id: 056c7317-9a09-4bd4-9067-d051312752ea
 3related:
 4    - id: 00ca75ab-d5ce-43be-b86c-55ff39c6abfc
 5      type: derived
 6status: experimental
 7description: |
 8    Detects the use of powershell commands from headless ConHost window.
 9    The "--headless" flag hides the windows from the user upon execution.    
10references:
11    - https://www.huntress.com/blog/fake-browser-updates-lead-to-boinc-volunteer-computing-software
12author: Matt Anderson (Huntress)
13date: 2024-07-23
14tags:
15    - attack.defense-evasion
16    - attack.t1059.001
17    - attack.t1059.003
18logsource:
19    category: process_creation
20    product: windows
21detection:
22    selection_img:
23        - Image|endswith: '\conhost.exe'
24        - OriginalFileName: 'CONHOST.EXE'
25    selection_cli:
26        CommandLine|contains|all:
27            - '--headless'
28            - 'powershell'
29    condition: all of selection_*
30falsepositives:
31    - Unknown
32level: medium