Ruby Inline Command Execution

calendar Aug 12, 2024 · attack.execution attack.t1059  ·
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Detects execution of ruby using the "-e" flag. This is could be used as a way to launch a reverse shell or execute live ruby code.

Sigma rule (View on GitHub)

 1title: Ruby Inline Command Execution
 2id: 20a5ffa1-3848-4584-b6f8-c7c7fd9f69c8
 3status: test
 4description: Detects execution of ruby using the "-e" flag. This is could be used as a way to launch a reverse shell or execute live ruby code.
 5references:
 6    - https://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet
 7    - https://www.revshells.com/
 8author: Nasreddine Bencherchali (Nextron Systems)
 9date: 2023-01-02
10tags:
11    - attack.execution
12    - attack.t1059
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_img:
18        - Image|endswith: '\ruby.exe'
19        - OriginalFileName: 'ruby.exe'
20    selection_cli:
21        CommandLine|contains: ' -e'
22    condition: all of selection_*
23falsepositives:
24    - Unknown
25level: medium

References

  • Reverse Shell Cheat Sheet

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  • Online - Reverse Shell Generator

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