Command Shell Unusual or Suspicious Process Ancestry

 1title: Command Shell Unusual or Suspicious Process Ancestry
 2id: 157c153a-97d1-43e4-bc25-5461f52c935d
 3status: experimental
 4description: Looks for suspicious process interactions between the Windows IIS worker
 5    process (w3wp.exe) and the command shell. Inspired by the 2022 Red Canary Threat
 6    Detection report.
 7references:
 8    - https://redcanary.com/threat-detection-report/techniques/windows-command-shell/
 9author: Micah Babinski
10date: 2022/11/03
11tags:
12    - attack.persistence
13    - attack.t1505
14    - attack.execution
15    - attack.t1059.003
16logsource:
17    category: process_creation
18    product: windows
19detection:
20    selection_process:
21        Image|endswith: '\cmd.exe'
22        ParentImage|endswith:
23            - '\w3wp.exe'
24            - '\wmiprvse.exe'
25    selection_cmdline:
26        - CommandLine|contains:
27                - 'http://'
28                - 'https://'
29                - 'echo'
30        - CommandLine|contains|all:
31                - '/c'
32                - 'powershell.exe'
33    condition: selection_process and selection_cmdline
34falsepositives:
35    - Unknown
36level: high```