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MediumSigmaHQNasreddine Bencherchali (Nextron Systems)

Potential Suspicious PowerShell Module File Created

Detects the creation of a new PowerShell module in the first folder of the module directory structure "\WindowsPowerShell\Modules\malware\malware.psm1". This is somewhat an uncommon practice as legitimate modules…

Description

Detects the creation of a new PowerShell module in the first folder of the module directory structure "\WindowsPowerShell\Modules\malware\malware.psm1". This is somewhat an uncommon practice as legitimate modules often includes a version folder.

Detection logic

Detection requirements

Log source product
windows
Log source category
file_event

Known benign triggers

  • False positive rate will vary depending on the environments. Additional filters might be required to make this logic usable in production.

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