Credential Dumping Attempt Via Svchost — Sigma Rule

Rule metadata and linked tags

Author: Florent Labouyrie. Source status: test; severity: high. Source dates: 2021-04-30 / 2022-10-09.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 9bcfda9fc179441d86afae297385df0666a961affb16f74cf0b0ec4a2ad1aa25

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: Credential Dumping Attempt Via Svchost
id: 174afcfa-6e40-4ae9-af64-496546389294
status: test
description: Detects when a process tries to access the memory of svchost to potentially dump credentials.
references:
    - Internal Research
author: Florent Labouyrie
date: 2021-04-30
modified: 2022-10-09
tags:
    - attack.privilege-escalation
    - attack.t1548
logsource:
    product: windows
    category: process_access
detection:
    selection:
        TargetImage|endswith: '\svchost.exe'
        GrantedAccess: '0x143a'
    filter_main_known_processes:
        SourceImage|endswith:
            - '\services.exe'
            - '\msiexec.exe'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• Internal Research (source note; no public URL supplied)