Suspicious Remote Logon with Explicit Credentials — Sigma Rule

Rule metadata and linked tags

Author: oscd.community, Teymur Kheirkhabarov @HeirhabarovT, Zach Stanford @svch0st, Tim Shelton. Source status: test; severity: medium. Source dates: 2020-10-05 / 2022-08-03.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 4297249a4b2573cb0d3797b5ce9d04d7dc43927c8aca0d20f94966c4e7adeb13

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: Suspicious Remote Logon with Explicit Credentials
id: 941e5c45-cda7-4864-8cea-bbb7458d194a
status: test
description: Detects suspicious processes logging on with explicit credentials
references:
    - https://drive.google.com/file/d/1lKya3_mLnR3UQuCoiYruO3qgu052_iS_/view
author: oscd.community, Teymur Kheirkhabarov @HeirhabarovT, Zach Stanford @svch0st, Tim Shelton
date: 2020-10-05
modified: 2022-08-03
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078
    - attack.lateral-movement
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 4648
        ProcessName|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
            - '\pwsh.exe'
            - '\winrs.exe'
            - '\wmic.exe'
            - '\net.exe'
            - '\net1.exe'
            - '\reg.exe'
    filter1:
        TargetServerName: 'localhost'
    filter2:
        SubjectUserName|endswith: '$'
        TargetUserName|endswith: '$'
    condition: selection and not 1 of filter*
falsepositives:
    - Administrators that use the RunAS command or scheduled tasks
level: medium

Original YAML and metadata in JSON

False positives

• Administrators that use the RunAS command or scheduled tasks

Source references

• https://drive.google.com/file/d/1lKya3_mLnR3UQuCoiYruO3qgu052_iS_/view