Nssm224 Privilege Escalation Updated _verified_

To grasp why NSSM is prone to privilege escalation, you must first understand and Service Binary Hijacking on Windows. What is NSSM?

A new service was installed. Monitor for unexpected variations of NSSM.

If permissions are weak, the attacker crafts a payload. For a simple local user addition, a C-based executable or a simple script converted to an EXE can be used. Alternatively, a reverse shell payload can be generated via MSFvenom:

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Security Operations Centers (SOC) should implement specific detection rules to flag anomalous service activities:

Mechanism A: Weak File Permissions (Binary Planting / Overwrite)

Configure Endpoint Detection and Response (EDR) tools to flag unusual child processes emerging from nssm.exe (such as cmd.exe or powershell.exe ). To grasp why NSSM is prone to privilege

Once an NSSM service is found (e.g., a service named BackupApp ), the attacker checks the permissions of the binary folder using icacls : icacls "C:\App\BackupApp" Use code with caution.

If you're interested in learning more, I can try to find the paper or provide more general information on the vulnerability.

Get-WmiObject win32_service | Select-Object Name, DisplayName, PathName, StartMode Use code with caution.

If the output shows (M) (Modify) or (F) (Full Control) for BUILTIN\Users or Authenticated Users , the service is vulnerable. Step 2: Crafting the Payload