Potential Suspicious Windows Feature Enabled

calendar Aug 12, 2024 · attack.defense-evasion  ·
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Detects usage of the built-in PowerShell cmdlet "Enable-WindowsOptionalFeature" used as a Deployment Image Servicing and Management tool. Similar to DISM.exe, this cmdlet is used to enumerate, install, uninstall, configure, and update features and packages in Windows images

Sigma rule (View on GitHub)

 1title: Potential Suspicious Windows Feature Enabled
 2id: 55c925c1-7195-426b-a136-a9396800e29b
 3related:
 4    - id: c740d4cf-a1e9-41de-bb16-8a46a4f57918
 5      type: similar
 6status: test
 7description: |
 8    Detects usage of the built-in PowerShell cmdlet "Enable-WindowsOptionalFeature" used as a Deployment Image Servicing and Management tool.
 9    Similar to DISM.exe, this cmdlet is used to enumerate, install, uninstall, configure, and update features and packages in Windows images    
10references:
11    - https://learn.microsoft.com/en-us/powershell/module/dism/enable-windowsoptionalfeature?view=windowsserver2022-ps
12    - https://learn.microsoft.com/en-us/windows/win32/projfs/enabling-windows-projected-file-system
13    - https://learn.microsoft.com/en-us/windows/wsl/install-on-server
14author: frack113
15date: 2022-09-10
16modified: 2022-12-29
17tags:
18    - attack.defense-evasion
19logsource:
20    product: windows
21    category: ps_script
22    definition: 'Requirements: Script Block Logging must be enabled'
23detection:
24    selection_cmd:
25        ScriptBlockText|contains|all:
26            - 'Enable-WindowsOptionalFeature'
27            - '-Online'
28            - '-FeatureName'
29    selection_feature:
30        # Add any insecure/unusual windows features to your env
31        ScriptBlockText|contains:
32            - 'TelnetServer'
33            - 'Internet-Explorer-Optional-amd64'
34            - 'TFTP'
35            - 'SMB1Protocol'
36            - 'Client-ProjFS'
37            - 'Microsoft-Windows-Subsystem-Linux'
38    condition: all of selection_*
39falsepositives:
40    - Legitimate usage of the features listed in the rule.
41level: medium

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