Logon Script (Windows)
Adversaries may use Windows logon scripts automatically executed at logon initialization to establish persistence. Windows allows logon scripts to be run whenever a specific user or group of users log into a system. This is done via adding a path to a script to the HKCU\Environment\UserInitMprLogonScript Registry key. Adversaries may use these scripts to maintain persistence on a single system. Depending on the access configuration of the logon scripts, either local credentials or an administrator account may be necessary.
Open detection, hunting, mitigation, and evidence workspace
Detection logic
Monitor for changes to Registry values associated with Windows logon scrips, nameley HKCU\Environment\UserInitMprLogonScript. Monitor running process for actions that could be indicative of abnormal programs or executables running upon logon.