Detectionhightest

Microsoft IIS Service Account Password Dumped

Detects the Internet Information Services (IIS) command-line tool, AppCmd, being used to list passwords

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Tim Rauch, Janantha Marasinghe, Elastic SecurityCreated Tue Nov 08Updated Sun Jan 222d3cdeec-c0db-45b4-aa86-082f7eb75701windows

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:
    selection_base_name:
        - Image|endswith: '\appcmd.exe'
        - OriginalFileName: 'appcmd.exe'
    selection_base_list:
        CommandLine|contains: 'list '
    selection_standalone:
        CommandLine|contains:
            - ' /config' # https://pbs.twimg.com/media/FgydDAJWIAEio34?format=png&name=900x900
            - ' /xml'
            # We cover the "-" version just in case :)
            - ' -config'
            - ' -xml'
    selection_cmd_flags:
        CommandLine|contains:
            - ' /@t' # Covers both "/@text:*" and "/@t:*"
            - ' /text'
            - ' /show'
            # We cover the "-" version just in case :)
            - ' -@t'
            - ' -text'
            - ' -show'
    selection_cmd_grep:
        CommandLine|contains:
            - ':\*'
            - 'password'
    condition: all of selection_base_* and (selection_standalone or all of selection_cmd_*)