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

Alert on Windows process execution of \SysmonEOP.exe with specific IMPhashes associated with the SysmonEOP PoC.

FreeReviewedSigma · Critical · v2

Product: windows
Category: process_creation
Author: Florian Roth (Nextron Systems) (SigmaHQ), DRL 1.1
Published: 2022-12-04
Updated: 2026-07-31

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

Related detections9 linkedT1068 — drag to rearrange

Malicious JuicyPotato Privilege Escalation Execution (UAT-7237)

Suspicious Dell ControlVault DLL Load by Unexpected Process (ReVault)

Malicious Known Vulnerable Driver Load for BYOVD Attack

Suspicious Vulnerable ASUS AsIO3.sys Driver Load

Malicious Qilin EDR Killer BYOVD Driver Load

Malicious Looney Tunables Privilege Escalation Exploit by Kinsing (via process_creation)

Malicious Kerberos proxiable/S4U2self Ticket - CVE-2021-42278/42287 (via security)

Malicious Vulnerable Driver HwRwDrv Loaded for BYOVD

Possible CopyFail Root Exploitation via Python Spawning SUID Shell (via process_creation)

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

Pivot detection · T1068 · 9 related

Changelog

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

Convert

This rule as a query you can run. Uses no unlock credit.

SplunkSPL