Login Hook - T1037.002 (43ba2b05-cf72-4b6c-8243-03a4aba41ee0)
Adversaries may use a Login Hook to establish persistence executed upon user logon. A login hook is a plist file that points to a specific script to execute with root privileges upon user logon. The plist file is located in the /Library/Preferences/com.apple.loginwindow.plist file and can be modified using the defaults command-line utility. This behavior is the same for logout hooks where a script can be executed upon user logout. All hooks require administrator permissions to modify or create hooks.(Citation: Login Scripts Apple Dev)(Citation: LoginWindowScripts Apple Dev)
Adversaries can add or insert a path to a malicious script in the com.apple.loginwindow.plist file, using the LoginHook or LogoutHook key-value pair. The malicious script is executed upon the next user login. If a login hook already exists, adversaries can add additional commands to an existing login hook. There can be only one login and logout hook on a system at a time.(Citation: S1 macOs Persistence)(Citation: Wardle Persistence Chapter)
Note: Login hooks were deprecated in 10.11 version of macOS in favor of Launch Daemon and Launch Agent
| Cluster A | Galaxy A | Cluster B | Galaxy B | Level |
|---|---|---|---|---|
| Login Hook - T1037.002 (43ba2b05-cf72-4b6c-8243-03a4aba41ee0) | Attack Pattern | Boot or Logon Initialization Scripts - T1037 (03259939-0b57-482f-8eb5-87c0e0d54334) | Attack Pattern | 1 |