Detectionhightest

PowerShell Web Access Feature Enabled Via DISM

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

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Michael HaagCreated Tue Sep 037e8f2d3b-9c1a-4f67-b9e8-8d9006e0e51fwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic
Detection Logic2 selectors
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

Legitimate PowerShell Web Access installations by administrators

Rule Metadata
Rule ID
7e8f2d3b-9c1a-4f67-b9e8-8d9006e0e51f
Status
test
Level
high
Type
Detection
Created
Tue Sep 03
Path
rules/windows/process_creation/proc_creation_win_dism_enable_powershell_web_access_feature.yml
Raw Tags
attack.privilege-escalationattack.defense-evasionattack.persistenceattack.t1548.002
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