Detectionmediumtest

New Module Module Added To IIS Server

Detects the addition of a new module to an IIS server.

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François HubautCreated Sun Oct 06dd857d3e-0c6e-457b-9b48-e82ae7f86bd7windows
Log Source
Windowsiis-configuration
ProductWindows← raw: windows
Serviceiis-configuration← raw: iis-configuration
Detection Logic
Detection Logic3 selectors
detection:
    selection:
        EventID: 29
        Configuration|contains: '/system.webServer/modules/add'
    filter_main_builtin:
        NewValue:
            - 'AnonymousAuthenticationModule'
            - 'CustomErrorModule'
            - 'DefaultDocumentModule'
            - 'DirectoryListingModule'
            - 'FileCacheModule'
            - 'HttpCacheModule'
            - 'HttpLoggingModule'
            - 'ProtocolSupportModule'
            - 'RequestFilteringModule'
            - 'StaticCompressionModule'
            - 'StaticFileModule'
            - 'TokenCacheModule'
            - 'UriCacheModule'
    filter_main_remove:
        NewValue: ''
    condition: selection and not 1 of filter_main_*
False Positives

Legitimate administrator activity

Rule Metadata
Rule ID
dd857d3e-0c6e-457b-9b48-e82ae7f86bd7
Status
test
Level
medium
Type
Detection
Created
Sun Oct 06
Path
rules/windows/builtin/iis-configuration/win_iis_module_added.yml
Raw Tags
attack.defense-evasionattack.persistenceattack.t1562.002attack.t1505.004
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