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fix: wsl fp on system execution anomaly detection #5690

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swachchhanda000 merged 1 commit into from
Oct 16, 2025
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fix: wsl fp on system execution anomaly detection #5690

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12 changes: 9 additions & 3 deletions rules/windows/process_creation/proc_creation_win_susp_system_exe_anomaly.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@ references:
- https://www.splunk.com/en_us/blog/security/inno-setup-malware-redline-stealer-campaign.html
author: Florian Roth (Nextron Systems), Patrick Bareiss, Anton Kutepov, oscd.community, Nasreddine Bencherchali (Nextron Systems)
date: 2017-11-27
modified: 2025-10-07
modified: 2025-10-13
tags:
- attack.defense-evasion
- attack.t1036
Expand Down Expand Up @@ -91,8 +91,14 @@ detection:
- 'C:\Program Files\WindowsApps\Microsoft.PowerShellPreview'
- '\AppData\Local\Microsoft\WindowsApps\Microsoft.PowerShellPreview' # pwsh installed from Microsoft Store
Image|endswith: '\pwsh.exe'
filter_main_wsl_windowsapps:
Image|startswith: 'C:\Program Files\WindowsApps\MicrosoftCorporationII.WindowsSubsystemForLinux'
filter_main_wsl_programfiles:
Image|startswith:
- 'C:\Program Files\WindowsApps\MicrosoftCorporationII.WindowsSubsystemForLinux'
- 'C:\Program Files\WSL\'
Image|endswith: '\wsl.exe'
filter_main_wsl_appdata:
Image|startswith: C:\Users\'
Image|contains: '\AppData\Local\Microsoft\WindowsApps\'
Image|endswith: '\wsl.exe'
condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
falsepositives:
Expand Down
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