CVE-2023-22518 Exploitation Attempt - Suspicious Confluence Child Process (Windows)

SIGMA detection rule by Andreas Braathen (mnemonic.io) · NOASSERTION

Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.

title: CVE-2023-22518 Exploitation Attempt - Suspicious Confluence Child Process (Windows)
id: 1ddaa9a4-eb0b-4398-a9fe-7b018f9e23db
related:
    - id: f8987c03-4290-4c96-870f-55e75ee377f4
      type: similar
status: test
description: |
    Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.
references:
    - https://confluence.atlassian.com/security/cve-2023-22518-improper-authorization-vulnerability-in-confluence-data-center-and-server-1311473907.html
    - https://www.huntress.com/blog/confluence-to-cerber-exploitation-of-cve-2023-22518-for-ransomware-deployment
    - https://github.com/ForceFledgling/CVE-2023-22518
author: Andreas Braathen (mnemonic.io)
date: 2023-11-14
tags:
    - attack.execution
    - attack.t1059
    - attack.initial-access
    - attack.t1190
    - cve.2023-22518
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection_parent:
        ParentImage|endswith:
            - '\tomcat8.exe'
            - '\tomcat9.exe'
            - '\tomcat10.exe'
        ParentCommandLine|contains: 'confluence'
    selection_child:
        # Note: Only children associated with known campaigns
        - Image|endswith:
              - '\cmd.exe'
              - '\powershell.exe'
        - OriginalFileName:
              - 'Cmd.Exe'
              - 'PowerShell.EXE'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

1adde611-5f52-4033-89d6-0c74762be797

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