Detectionhightest

HackTool - CrackMapExec File Indicators

Detects file creation events with filename patterns used by CrackMapExec.

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

Nasreddine Bencherchali (Nextron Systems)Created Mon Mar 11Updated Thu Jun 27736ffa74-5f6f-44ca-94ef-1c0df4f51d2awindows

Log Source

WindowsFile Event

ProductWindows← raw: windows

CategoryFile Event← raw: file_event

Events for file system activity including creation, modification, and deletion.

Detection Logic

detection:
    selection_path:
        TargetFilename|startswith: 'C:\Windows\Temp\' # The disk extension is hardcoded in the tool.
    selection_names_str:
        TargetFilename|endswith:
            - '\temp.ps1' # https://github.com/byt3bl33d3r/CrackMapExec/blob/3c3e412193cb6d3237abe90c543e5d995bfa4447/cme/modules/keepass_trigger.py#L42C41-L42C68
            - '\msol.ps1' # https://github.com/byt3bl33d3r/CrackMapExec/blob/3c3e412193cb6d3237abe90c543e5d995bfa4447/cme/modules/msol.py#L48C98-L48C106
    selection_names_re:
        - TargetFilename|re: '\\[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\.txt$' # https://github.com/byt3bl33d3r/CrackMapExec/blob/3c3e412193cb6d3237abe90c543e5d995bfa4447/cme/protocols/wmi/wmiexec.py#L86
        - TargetFilename|re: '\\[a-zA-Z]{8}\.tmp$' # https://github.com/byt3bl33d3r/CrackMapExec/blob/3c3e412193cb6d3237abe90c543e5d995bfa4447/cme/protocols/smb/atexec.py#L145C19-L146
    condition: selection_path and 1 of selection_names_*