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Update the detection logic of Suspicious Start-Process PassThru and added the alias saps#6021

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eriknordstrm:fix-posh-ps-susp-start-process
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Update the detection logic of Suspicious Start-Process PassThru and added the alias saps#6021
eriknordstrm wants to merge 1 commit into
SigmaHQ:masterfrom
eriknordstrm:fix-posh-ps-susp-start-process

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Summary of the Pull Request

This pull request updates Suspicious Start-Process PassThru, adding the Start-Process alias saps.
Reference: https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/start-process?view=powershell-7.6

Changelog

fix: Added the alias saps to Suspicious Start-Process PassThru.
update: Altered the detection logic of Suspicious Start-Process PassThru to split the cmdlet and parameters.

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Fixed Issues

SigmaHQ Rule Creation Conventions

  • If your PR adds new rules, please consider following and applying these conventions

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Welcome 👋

It looks like this is your first pull request on the Sigma rules repository!

Please make sure to read the SigmaHQ conventions to make sure your contribution is adhering to best practices and has all the necessary elements in place for a successful approval.

Thanks again, and welcome to the Sigma community! 😃

@github-actions github-actions Bot added Rules Review Needed The PR requires review Windows Pull request add/update windows related rules labels May 18, 2026

@swachchhanda000 swachchhanda000 left a comment

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Looks good overall.
Small concern on saps specifically: since ScriptBlockText|contains is substring-based and I have a small doubt whether saps will match as substring of a larger stringtext. @nasbench, Please share your two cents on this??

@swachchhanda000 swachchhanda000 added this to the Sigma-May-Release milestone May 25, 2026
@swachchhanda000 swachchhanda000 added Ready to Merge and removed Review Needed The PR requires review labels May 25, 2026
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