Windows Process Creation: SysmonEOP.exe HackTool Execution (CVE-2022-41120 PoC)

ATT&CK techniques

Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1068Exploitation for Privilege Escalation
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule flags execution of the SysmonEOP.exe binary associated with a public proof-of-concept for exploiting Sysmon CVE-2022-41120. Such tooling is commonly used to attempt privilege escalation by leveraging a Sysmon-related vulnerability. Detection relies on Windows process creation telemetry, matching the executable name and specific embedded imphash values in the process hashes.

Reporting behind it

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Windows Process Creation: SysmonEOP.exe HackTool Execution (CVE-2022-41120 PoC)

Pivot detection · T1068 · 9 related

Changelog

v2

v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

windows-sysmoneop-hacktool-execution-via-sysmoneop-exe-name-and-imphash-8a7e90c5

title: "Windows Process Creation: SysmonEOP.exe HackTool Execution (CVE-2022-41120 PoC)"
id: d2fce273-452e-42e4-870a-1521888828d0
status: test
description: This rule flags execution of the SysmonEOP.exe binary associated with a public proof-of-concept for exploiting Sysmon CVE-2022-41120. Such tooling is commonly used to attempt privilege escalation by leveraging a Sysmon-related vulnerability. Detection relies on Windows process creation telemetry, matching the executable name and specific embedded imphash values in the process hashes.
references:
  - https://github.com/Wh04m1001/SysmonEoP
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_hktl_sysmoneop.yml
author: Florian Roth (Nextron Systems), Huntrule Team
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
license: DRL-1.1
related:
  - id: 8a7e90c5-fe6e-45dc-889e-057fe4378bd9
    type: derived

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