Understanding NSSM224: Local Privilege Escalation Vulnerability and Mitigation
Weak permissions on the service itself, allowing low-privileged users to modify configuration parameters via the SCM. 2. Technical Mechanics of the Escalation nssm224 privilege escalation updated
When NSSM registers a service, it relies on a specific application binary located in a designated directory. If the permissions (Access Control Lists) on either the NSSM binary or the target application folder allow standard users to write or modify files, an attacker can simply replace the legitimate executable with a malicious one (e.g., a reverse shell). When the service restarts, the payload runs as SYSTEM . 2. Weak Service Registry Permissions If the permissions (Access Control Lists) on either
An attacker generates a malicious payload using a tool like msfvenom to spawn a reverse shell: Weak Service Registry Permissions An attacker generates a
Disable-AclInheritance -Path "C:\YourServiceDirectory" -InheritCopy $Acl = Get-Acl -Path "C:\YourServiceDirectory" # Remove Modify/Write access for Users/Everyone Use code with caution. 2. Restrict Service Permissions via SDDL
Securing your environment against NSSM224 requires a multi-layered approach to access management and system hardening. Enforce the Principle of Least Privilege