New Capture Session Launched Via DXCap.EXE

calendar Aug 29, 2024 · attack.defense-evasion attack.t1218  ·
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Detects the execution of "DXCap.EXE" with the "-c" flag, which allows a user to launch any arbitrary binary or windows package through DXCap itself. This can be abused to potentially bypass application whitelisting.

Sigma rule (View on GitHub)

 1title: New Capture Session Launched Via DXCap.EXE
 2id: 60f16a96-db70-42eb-8f76-16763e333590
 3status: test
 4description: |
 5        Detects the execution of "DXCap.EXE" with the "-c" flag, which allows a user to launch any arbitrary binary or windows package through DXCap itself. This can be abused to potentially bypass application whitelisting.
 6references:
 7    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Dxcap/
 8    - https://twitter.com/harr0ey/status/992008180904419328
 9author: Beyu Denis, oscd.community, Nasreddine Bencherchali (Nextron Systems)
10date: 2019-10-26
11modified: 2022-06-09
12tags:
13    - attack.defense-evasion
14    - attack.t1218
15logsource:
16    category: process_creation
17    product: windows
18detection:
19    selection_img:
20        - Image|endswith: '\DXCap.exe'
21        - OriginalFileName: 'DXCap.exe'
22    selection_cli:
23        CommandLine|contains: ' -c ' # The ".exe" is not required to run the binary
24    condition: all of selection*
25falsepositives:
26    - Legitimate execution of dxcap.exe by legitimate user
27level: medium

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