HackTool - SysmonEOP Execution

Hunt Hypothesis

Detects the execution of the PoC that can be used to exploit Sysmon CVE-2022-41120

Detection Rule

Sigma (Original)

title: HackTool - SysmonEOP Execution
id: 8a7e90c5-fe6e-45dc-889e-057fe4378bd9
status: test
description: Detects the execution of the PoC that can be used to exploit Sysmon CVE-2022-41120
references:
    - https://github.com/Wh04m1001/SysmonEoP
author: Florian Roth (Nextron Systems)
date: 2022-12-04
modified: 2024-11-23
tags:
    - cve.2022-41120
    - attack.t1068
    - attack.privilege-escalation
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        Image|endswith: '\SysmonEOP.exe'
    selection_hash:
        Hashes|contains:
            - 'IMPHASH=22F4089EB8ABA31E1BB162C6D9BF72E5'
            - 'IMPHASH=5123FA4C4384D431CD0D893EEB49BBEC'
    condition: 1 of selection_*
falsepositives:
    - Unlikely
level: critical

KQL (Azure Sentinel)

imProcessCreate
| where TargetProcessName endswith "\\SysmonEOP.exe" or (TargetProcessIMPHASH startswith "22F4089EB8ABA31E1BB162C6D9BF72E5" or TargetProcessIMPHASH startswith "5123FA4C4384D431CD0D893EEB49BBEC")

Required Data Sources

False Positive Guidance

• Unlikely

MITRE ATT&CK Context

• Tactic: Privilege Escalation
• Technique: T1068 — T1068

References

• https://github.com/Wh04m1001/SysmonEoP
• SigmaHQ Rule