Sigma rule: PowerShell Web Access Feature Enabled Via DISM

Rule

Title

PowerShell Web Access Feature Enabled Via DISM

Status

test

Level

high

Author

Michael Haag

Date

2024-09-03

File

rules/windows/process_creation/proc_creation_win_dism_enable_powershell_web_access_feature.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the use of DISM to enable the PowerShell Web Access feature, which could be used for remote access and potential abuse

Log source

product

windows

category

process_creation

Detection

selection_img:
    - Image|endswith: '\dism.exe'
    - OriginalFileName: 'DISM.EXE'
selection_cli:
    CommandLine|contains|all:
        - 'WindowsPowerShellWebAccess'
        - '/online'
        - '/enable-feature'
condition: all of selection_*

False positives (as the rule lists them)

• Legitimate PowerShell Web Access installations by administrators

Tags

• attack.privilege-escalation
• attack.persistence
• attack.t1548.002

MITRE ATT&CK ids this rule names

• T1548.002

References

• https://docs.microsoft.com/en-us/powershell/module/dism/enable-windowsoptionalfeature
• https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-241a
• https://gist.github.com/MHaggis/7e67b659af9148fa593cf2402edebb41

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_dism_enable_powershell_web_access_feature.yml