Catch first arg with shorten

lib/msf/core/exploit/powershell.rb

@@ -163,18 +163,21 @@ module Exploit::Powershell
 
     # Shorten arg if PSH 2.0+
     if opts[:shorten]
+      # Invoke-Command and Out-File require these options to have
+      # an additional space before to prevent Powershell code being
+      # mangled.
       arg_string.gsub!(' -Command ', ' -c ')
-      arg_string.gsub!(' -EncodedCommand ', ' -e ')
-      arg_string.gsub!(' -ExecutionPolicy ', ' -ep ')
+      arg_string.gsub!('-EncodedCommand ', ' -e ')
+      arg_string.gsub!('-ExecutionPolicy ', ' -ep ')
       arg_string.gsub!(' -File ', ' -f ')
-      arg_string.gsub!(' -InputFormat ', ' -i ')
-      arg_string.gsub!(' -NoExit ', ' -noe ')
-      arg_string.gsub!(' -NoLogo ', ' -nol ')
-      arg_string.gsub!(' -NoProfile ', ' -nop ')
-      arg_string.gsub!(' -NonInteractive ', ' -noni ')
-      arg_string.gsub!(' -OutputFormat ', ' -o ')
-      arg_string.gsub!(' -Sta ', ' -s ')
-      arg_string.gsub!(' -WindowStyle ', ' -w ')
+      arg_string.gsub!('-InputFormat ', ' -i ')
+      arg_string.gsub!('-NoExit ', ' -noe ')
+      arg_string.gsub!('-NoLogo ', ' -nol ')
+      arg_string.gsub!('-NoProfile ', ' -nop ')
+      arg_string.gsub!('-NonInteractive ', ' -noni ')
+      arg_string.gsub!('-OutputFormat ', ' -o ')
+      arg_string.gsub!('-Sta ', ' -s ')
+      arg_string.gsub!('-WindowStyle ', ' -w ')
     end
 
     #Strip off first space character