Suspicious Child Process Of Manage Engine ServiceDesk — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2023-01-18 / 2023-08-29.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 1c1e5629d72dfd1c191d5370b869e02d0e80fc7c49b4bb65edef9bbcbd7fd418

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 Child Process Of Manage Engine ServiceDesk
id: cea2b7ea-792b-405f-95a1-b903ea06458f
status: test
description: Detects suspicious child processes of the "Manage Engine ServiceDesk Plus" Java web service
references:
    - https://www.horizon3.ai/manageengine-cve-2022-47966-technical-deep-dive/
    - https://github.com/horizon3ai/CVE-2022-47966/blob/3a51c6b72ebbd87392babd955a8fbeaee2090b35/CVE-2022-47966.py
    - https://blog.viettelcybersecurity.com/saml-show-stopper/
author: Florian Roth (Nextron Systems)
date: 2023-01-18
modified: 2023-08-29
tags:
    - attack.command-and-control
    - attack.t1102
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|contains|all:
            - '\ManageEngine\ServiceDesk\'
            - '\java.exe'
        Image|endswith:
            - '\AppVLP.exe'
            - '\bash.exe'
            - '\bitsadmin.exe'
            - '\calc.exe'
            - '\certutil.exe'
            - '\cscript.exe'
            - '\curl.exe'
            - '\forfiles.exe'
            - '\mftrace.exe'
            - '\mshta.exe'
            - '\net.exe'
            - '\net1.exe'
            - '\notepad.exe'  # Often used in POCs
            - '\powershell.exe'
            - '\pwsh.exe'
            - '\query.exe'
            - '\reg.exe'
            - '\schtasks.exe'
            - '\scrcons.exe'
            - '\sh.exe'
            - '\systeminfo.exe'
            - '\whoami.exe'  # Often used in POCs
            - '\wmic.exe'
            - '\wscript.exe'
            # - '\hh.exe'
            # - '\regsvr32.exe'
            # - '\rundll32.exe'
            # - '\scriptrunner.exe'
    filter_main_net:
        Image|endswith:
            - '\net.exe'
            - '\net1.exe'
        CommandLine|contains: ' stop'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Legitimate sub processes started by Manage Engine ServiceDesk Pro
level: high

Original YAML and metadata in JSON

False positives

• Legitimate sub processes started by Manage Engine ServiceDesk Pro

Source references

• https://www.horizon3.ai/manageengine-cve-2022-47966-technical-deep-dive/
• https://github.com/horizon3ai/CVE-2022-47966/blob/3a51c6b72ebbd87392babd955a8fbeaee2090b35/CVE-2022-47966.py
• https://blog.viettelcybersecurity.com/saml-show-stopper/