Enhance T1496(Resource Hijacking): Add Windows CPU Load Simulation (#3275)

atomics/T1496/T1496.yaml

@@ -14,3 +14,24 @@ atomic_tests:
       yes > /dev/null
     name: sh
 
+- name: Windows - Simulate CPU Load with PowerShell
+  description: |
+    This test simulates high CPU load using PowerShell, commonly seen in resource hijacking.
+    Spawns background jobs to stress CPU cores for a specified duration.
+  supported_platforms:
+  - windows
+  input_arguments:
+    duration_seconds:
+      description: Duration in seconds to run the CPU stress test
+      type: integer
+      default: 30
+    cpu_threads:
+      description: Number of threads to stress (default 4)
+      type: integer
+      default: 4
+  executor:
+    command: |
+      $end = (Get-Date).AddSeconds(#{duration_seconds})
+      1..#{cpu_threads} | ForEach-Object { Start-Job { param($t) while((Get-Date) -lt $t) { $i=0; while($i -lt 200000){$i++} } } -ArgumentList $end }
+      Get-Job | Wait-Job | Remove-Job
+    name: powershell