Nssm-2.24 Privilege Escalation Here

: If a service created by NSSM has a path containing spaces and is not enclosed in quotation marks (e.g., C:\Program Files\My Service\nssm.exe

Evidence and observed occurrences

Avoid running services as LocalSystem unless absolutely necessary. Instead, create a or a dedicated low-privilege user account with only the specific permissions required to run that application. 4. Upgrade and Monitor nssm-2.24 privilege escalation

NSSM (Non-Sucking Service Manager) version 2.24 is a widely used tool for managing Windows services, but it presents specific security risks, primarily revolving around . While NSSM itself is not inherently "malicious," its misconfiguration or presence in a compromised environment can be leveraged by attackers to gain NT AUTHORITY\SYSTEM privileges. Deep Review of NSSM 2.24 Vulnerabilities 1. Unquoted Service Path (Most Common)

As defenders, we must treat every binary on our systems—especially those capable of managing services—as a potential threat vector. The presence of NSSM 2.24 on a machine should be considered a critical finding, equivalent to an unpatched local exploit. : If a service created by NSSM has

In this simplified scenario, the Authenticated Users:C permission indicates that any authenticated user has Change permission—the critical weakness that enables the attack.

The attacker renames the original nssm.exe (if permissions allow) or overwrites it with their malicious version. Step 4: Triggering Execution Unquoted Service Path (Most Common) As defenders, we

: Ensure the directory containing nssm.exe is only writable by high-privilege accounts.

: When the system reboots or the service restarts, Windows executes the malicious binary with high privileges, granting the attacker full administrative control over the machine. Exploit Step-by-Step: From User to SYSTEM

A conceptual example of how an attacker might exploit this vulnerability in a penetration testing scenario: