Sigma rule: Indirect Inline Command Execution Via Bash.EXE

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-ca45b5f88201, updated 2023-08-15T00:00:00.000Z.

Rule

Title
Indirect Inline Command Execution Via Bash.EXE
Status
test
Level
medium
Author
frack113
Date
2021-11-24
Modified
2023-08-15
File
rules/windows/process_creation/proc_creation_win_bash_command_execution.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects execution of Microsoft bash launcher with the "-c" flag.
This can be used to potentially bypass defenses and execute Linux or Windows-based binaries directly via bash.

Log source

product
windows
category
process_creation

Detection

selection_img:
    - Image|endswith:
          - ':\Windows\System32\bash.exe'
          - ':\Windows\SysWOW64\bash.exe'
    - OriginalFileName: 'Bash.exe'
selection_cli:
    CommandLine|contains: ' -c '
condition: all of selection_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.stealth
  • attack.t1202

MITRE ATT&CK ids this rule names

Related rules

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_bash_command_execution.yml

Sources and licences

  • SigmaHQ

    "Indirect Inline Command Execution Via Bash.EXE" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_bash_command_execution.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Indirect Inline Command Execution Via Bash.EXE",
entity page, dataset version ref-ca45b5f88201, updated 2023-08-15T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/5edc2273-c26f-406c-83f3-f4d948e740dd (accessed 2026-11-03).
Underlying source: SigmaHQ rule 5edc2273-c26f-406c-83f3-f4d948e740dd, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.