Execute MSDT Via Answer File

 1title: Execute MSDT Via Answer File
 2id: 9c8c7000-3065-44a8-a555-79bcba5d9955
 3status: test
 4description: Detects execution of "msdt.exe" using an answer file which is simulating the legitimate way of calling msdt via "pcwrun.exe" (For example from the compatibility tab)
 5references:
 6    - https://lolbas-project.github.io/lolbas/Binaries/Msdt/
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2022/06/13
 9tags:
10    - attack.defense_evasion
11    - attack.t1218
12    - attack.execution
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_cli:
18        Image|endswith: '\msdt.exe'
19        CommandLine|contains: '\WINDOWS\diagnostics\index\PCWDiagnostic.xml'
20    selection_answer:
21        CommandLine|contains:
22            - ' -af '
23            - ' /af '
24    filter:
25        ParentImage|endswith: '\pcwrun.exe'
26    condition: all of selection* and not filter
27falsepositives:
28    - Possible undocumented parents of "msdt" other than "pcwrun"
29level: high