Update T1218.yaml (#2596)

Added prereqs to T1218#12 so it can be executed remotely with invoke-atomictest

atomics/T1218/T1218.yaml

@@ -313,6 +313,14 @@ atomic_tests:
       description: Path to ie4uinit.exe
       type: path
       default: c:\windows\system32\ie4uinit.exe
+  dependencies:
+  - description: |
+      ieuinit.inf must exist on disk at specified location (#{Path_inf})
+    prereq_command: |
+      if (Test-Path "#{Path_inf}") {exit 0} else {exit 1}
+    get_prereq_command: |
+      New-Item -Type Directory (split-path "#{Path_inf}") -ErrorAction ignore | Out-Null
+      Invoke-WebRequest "https://github.com/redcanaryco/atomic-red-team/raw/master/atomics/T1218/src/ieuinit.inf" -OutFile "#{Path_inf}"
   executor:
     command: |
       copy #{Path_ie4uinit} %TEMP%\ie4uinit.exe
@@ -364,4 +372,4 @@ atomic_tests:
       reg.exe add HKLM\SOFTWARE\Microsoft\Provisioning\Commands\LOLBin\dummy1 /v altitude /t REG_DWORD /d 0
       reg add HKLM\SOFTWARE\Microsoft\Provisioning\Commands\LOLBin\dummy1\dummy2 /v Commandline /d calc.exe
       c:\windows\system32\provlaunch.exe LOLBin
-    name: command_prompt
+    name: command_prompt