Suspicious Volume Shadow Copy Vsstrace.dll Load

 1title: Suspicious Volume Shadow Copy Vsstrace.dll Load
 2id: 48bfd177-7cf2-412b-ad77-baf923489e82
 3related:
 4    - id: 333cdbe8-27bb-4246-bf82-b41a0dca4b70 # vss_ps.dll
 5      type: similar
 6    - id: 37774c23-25a1-4adb-bb6d-8bb9fd59c0f8 # vssapi.dll
 7      type: similar
 8status: test
 9description: Detects the image load of VSS DLL by uncommon executables
10references:
11    - https://github.com/ORCx41/DeleteShadowCopies
12author: frack113
13date: 2023/02/17
14modified: 2023/03/28
15tags:
16    - attack.defense_evasion
17    - attack.impact
18    - attack.t1490
19logsource:
20    category: image_load
21    product: windows
22detection:
23    selection:
24        ImageLoaded|endswith: '\vsstrace.dll'
25    filter_windows:
26        - Image:
27              - 'C:\Windows\explorer.exe'
28              - 'C:\Windows\ImmersiveControlPanel\SystemSettings.exe'
29        - Image|startswith:
30              - 'C:\Windows\System32\'
31              - 'C:\Windows\SysWOW64\'
32              - 'C:\Windows\Temp\{' # Installers
33              - 'C:\Windows\WinSxS\'
34    filter_program_files:
35        # When using this rule in your environment replace the "Program Files" folder by the exact applications you know use this. Examples would be software such as backup solutions
36        Image|startswith:
37            - 'C:\Program Files\'
38            - 'C:\Program Files (x86)\'
39    condition: selection and not 1 of filter_*
40falsepositives:
41    - Unknown
42level: high