Update T1112.yaml (#2870)

Added New Test : Adding custom paths for application execution

Co-authored-by: Carrie Roberts <clr2of8@gmail.com>

atomics/T1112/T1112.yaml

@@ -1356,4 +1356,29 @@ atomic_tests:
     cleanup_command: |
       reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\BackupPath" /t REG_EXPAND_SZ /d "%SystemRoot%\system32\sdclt.exe" /f
     name: command_prompt
+    elevation_required: true
+
+- name: Adding custom paths for application execution
+  description: |
+    As per Microsoft,the entries found under App Paths are used primarily to map an application’s executable file name to that file’s fully qualified path and to pre-pend information to the PATH environment variable on a per-application, per-process basis. 
+    The path can be modified to load a custom application of choice. 
+    Post the registry changes of this test, when someone tries to manually run msedge.exe via StartMenu/Run window , notepad will be launched.
+  supported_platforms:
+  - windows 
+  input_arguments:
+    app_name:
+      description: path of application to be modified
+      type: string
+      default: msedge.exe 
+    new_path:
+      description: New App Path Added
+      type: string
+      default: C:\Windows\System32\notepad.exe 
+  executor:
+    command: |
+      reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\#{app_name}" /t REG_SZ /d #{new_path} /f
+    cleanup_command: |
+      reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\#{app_name}" /v (Default) /f
+      reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\#{app_name}" /t REG_SZ /d "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" /f
+    name: command_prompt
     elevation_required: true