Visual Basic Command Line Compiler Usage

calendar Aug 12, 2024 · attack.defense-evasion attack.t1027.004  ·
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Detects successful code compilation via Visual Basic Command Line Compiler that utilizes Windows Resource to Object Converter.

Sigma rule (View on GitHub)

 1title: Visual Basic Command Line Compiler Usage
 2id: 7b10f171-7f04-47c7-9fa2-5be43c76e535
 3status: test
 4description: Detects successful code compilation via Visual Basic Command Line Compiler that utilizes Windows Resource to Object Converter.
 5references:
 6    - https://lolbas-project.github.io/lolbas/Binaries/Vbc/
 7author: 'Ensar Şamil, @sblmsrsn, @oscd_initiative'
 8date: 2020-10-07
 9modified: 2021-11-27
10tags:
11    - attack.defense-evasion
12    - attack.t1027.004
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection:
18        ParentImage|endswith: '\vbc.exe'
19        Image|endswith: '\cvtres.exe'
20    condition: selection
21falsepositives:
22    - Utilization of this tool should not be seen in enterprise environment
23level: high

References

  • Vbc on LOLBAS

    vbc.exe is a living-of-the-land file containing unexpected functionality that can be abused by attackers; this page lists all its use cases.


    Read More

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