Detectionmediumtest

Capture Credentials with Rpcping.exe

Detects using Rpcping.exe to send a RPC test connection to the target server (-s) and force the NTLM hash to be sent in the process.

Convert In Phoenix Studio

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

Launch

Julia Fomina, oscd.communityCreated Fri Oct 09Updated Fri Oct 3193671f99-04eb-4ab4-a161-70d446a84003windows

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_main_img:
        - Image|endswith: '\RpcPing.exe'
        - OriginalFileName: '\RpcPing.exe'
    selection_main_flag:
        CommandLine|contains|windash: '-s'
    selection_cli_ntlm:
        CommandLine|contains|windash: '-u'
        CommandLine|contains: 'NTLM'
    selection_cli_ncacn:
        CommandLine|contains|windash: '-t'
        CommandLine|contains: 'ncacn_np'
    condition: all of selection_main_* and 1 of selection_cli_*