Capture Credentials with Rpcping.exe — Sigma Rule

Rule metadata and linked tags

Author: Julia Fomina, oscd.community. Source status: test; severity: medium. Source dates: 2020-10-09 / 2025-10-31.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 95e7a4bb4e8ffb041db6b85bfbb1e94d2a666f289b27faed42874c7c5f90b841

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Capture Credentials with Rpcping.exe
id: 93671f99-04eb-4ab4-a161-70d446a84003
status: test
description: 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.
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Rpcping/
    - https://twitter.com/vysecurity/status/974806438316072960
    - https://twitter.com/vysecurity/status/873181705024266241
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/hh875578(v=ws.11)
author: Julia Fomina, oscd.community
date: 2020-10-09
modified: 2025-10-31
tags:
    - attack.credential-access
    - attack.t1003
logsource:
    category: process_creation
    product: windows
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_*
falsepositives:
    - Unlikely
level: medium

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://lolbas-project.github.io/lolbas/Binaries/Rpcping/
• https://twitter.com/vysecurity/status/974806438316072960
• https://twitter.com/vysecurity/status/873181705024266241
• https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/hh875578(v=ws.11)