Nssm224 Privilege Escalation Updated |work|

Monitor Windows Security Event ID 7045 (A new service was created) and Event ID 7040 (The start type of a service was changed).

reg add "HKLM\SYSTEM\CurrentControlSet\Services\TargetService\Parameters" /v Application /t REG_SZ /d "C:\Temp\payload.exe" /f Use code with caution.

When NSSM 2.24 installs a service pointing to a path containing spaces (e.g., C:\Program Files\MyApp\run.bat ) without quotes, Windows parses the path ambiguously. nssm224 privilege escalation updated

NSSM stores service configurations in the Windows Registry. If a standard user can modify the ImagePath or Parameters keys for an NSSM-managed service, they can redirect the service to run a malicious script with elevated privileges upon the next restart. Updated Defensive Strategies for 2026

This guide provides an updated overview of the vulnerabilities, exploitation techniques, and critical remediation steps for NSSM 2.24. 1. What is NSSM and Why is it Vulnerable? Monitor Windows Security Event ID 7045 (A new

Whenever feasible, steer away from assigning NT AUTHORITY\SYSTEM to custom wrapped applications. Instead:

If your pathing contains spaces, ensure the service configuration accurately reflects a quoted string. This prevents Windows from processing unquoted path ambiguities.Fixing an unquoted path via command line: NSSM stores service configurations in the Windows Registry

An attacker generates a malicious payload using a tool like msfvenom to spawn a reverse shell:

Attackers can change the AppDirectory or AppParameters registry keys to force the service to run arbitrary code. 2. Updated Privilege Escalation Techniques (2026)

move "C:\Program Files\Amateur Service\app.exe" "C:\Program Files\Amateur Service\app.exe.bak" move service.exe "C:\Program Files\Amateur Service\app.exe" Use code with caution.

When a service is created using NSSM, the utility acts as a wrapper. It registers itself as the service binary and reads configuration details from the Windows Registry to determine which application to launch. If an administrator configures the service improperly, a local attacker with low-privilege access can exploit it to execute arbitrary code with elevated permissions (typically NT AUTHORITY\SYSTEM ). Key Exploitation Vectors