WCE wceaux.dll Access — Sigma Rule

Rule metadata and linked tags

Author: Thomas Patzke. Source status: test; severity: critical. Source dates: 2017-06-14 / 2025-01-30.

{
  "product": "windows",
  "service": "security"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 2327964b227ba200b16f819e13e33eba999ea709e1b1d6801223a143f6fb31a6

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: WCE wceaux.dll Access
id: 1de68c67-af5c-4097-9c85-fe5578e09e67
status: test
description: Detects wceaux.dll access while WCE pass-the-hash remote command execution on source host
references:
    - https://www.jpcert.or.jp/english/pub/sr/ir_research.html
    - https://jpcertcc.github.io/ToolAnalysisResultSheet
author: Thomas Patzke
date: 2017-06-14
modified: 2025-01-30
tags:
    - attack.credential-access
    - attack.t1003
    - attack.s0005
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID:
            - 4656
            - 4663
        ObjectName|endswith: '\wceaux.dll'
    condition: selection
falsepositives:
    - Unknown
level: critical

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.jpcert.or.jp/english/pub/sr/ir_research.html
• https://jpcertcc.github.io/ToolAnalysisResultSheet