Find sigma rule 
Attack: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine. Active Setup is a Windows mechanism that is used to execute programs when a user logs in. The value stored in the Registry key will be executed after a user logs into the computer.(Citation: Klein Active Setup 2010) These programs will be executed under the context of the user and will have the account’s associated permissions level.
Adversaries may abuse Active Setup by creating a key under HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\ and setting a malicious value for StubPath. This value will serve as the program that will be executed when a user logs into the computer.(Citation: Mandiant Glyer APT 2010)(Citation: Citizenlab Packrat 2015)(Citation: FireEye CFR Watering Hole 2012)(Citation: SECURELIST Bright Star 2015)(Citation: paloalto Tropic Trooper 2016)
Adversaries can abuse these components to execute malware, such as remote access tools, to maintain persistence through system reboots. Adversaries may also use Masquerading to make the Registry entries look as if they are associated with legitimate programs.
MITRE
Tactic
- persistence
- privilege-escalation
technique
- T1547.014
Test : HKLM - Add malicious StubPath value to existing Active Setup Entry
OS
- windows
Description:
This test will add a StubPath entry to the Active Setup native registry key associated with ‘Internet Explorer Core Fonts’ (UUID {C9E9A340-D1F1-11D0-821E-444553540600}) Said key doesn’t have a StubPath value by default, by adding one it will launch calc by forcing to run active setup using runonce.exe /AlternateShellStartup. Without the last command it will normally run on next user logon. Note: this test will only run once successfully if no cleanup command is run in between test.
Executor
powershell
Sigma Rule
- proc_creation_win_runonce_execution.yml (id: 198effb6-6c98-4d0c-9ea3-451fa143c45c)