Execution Of Non-Existing File

 1title: Execution Of Non-Existing File
 2id: 71158e3f-df67-472b-930e-7d287acaa3e1
 3status: test
 4description: Checks whether the image specified in a process creation event is not a full, absolute path (caused by process ghosting or other unorthodox methods to start a process)
 5references:
 6    - https://pentestlaboratories.com/2021/12/08/process-ghosting/
 7author: Max Altgelt (Nextron Systems)
 8date: 2021/12/09
 9modified: 2022/12/14
10tags:
11    - attack.defense_evasion
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    image_absolute_path:
17        Image|contains: '\'
18    filter_null:
19        Image: null
20    filter_empty:
21        Image:
22            - '-'
23            - ''
24    filter_4688:
25        - Image:
26              - 'System'
27              - 'Registry'
28              - 'MemCompression'
29              - 'vmmem'
30        - CommandLine:
31              - 'Registry'
32              - 'MemCompression'
33              - 'vmmem'
34    condition: not image_absolute_path and not 1 of filter*
35falsepositives:
36    - Unknown
37level: high