Detectionmediumtest

PowerShell Script Run in AppData

Detects a suspicious command line execution that invokes PowerShell with reference to an AppData folder

Convert In Phoenix Studio

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

Florian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.communityCreated Wed Jan 09Updated Thu Jul 14ac175779-025a-4f12-98b0-acdaeb77ea85windows

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:
    selection1:
        CommandLine|contains:
            - 'powershell.exe'
            - '\powershell'
            - '\pwsh'
            - 'pwsh.exe'
    selection2:
        CommandLine|contains|all:
            - '/c '
            - '\AppData\'
        CommandLine|contains:
            - 'Local\'
            - 'Roaming\'
    condition: all of selection*