Update Meterpreter URL length to 512

lib/msf/core/payload/windows/stageless_meterpreter.rb

@@ -77,7 +77,7 @@ module Payload::Windows::StagelessMeterpreter
     # the URL might not be given, as it might be patched in some other way
     if url
       # Patch the URL using the patcher as this upports both ASCII and WCHAR.
-      Rex::Payloads::Meterpreter::Patch.patch_string!(dll, "https://#{'X' * 256}", "s#{url}\x00")
+      Rex::Payloads::Meterpreter::Patch.patch_string!(dll, "https://#{'X' * 512}", "s#{url}\x00")
     end
 
     # if a block is given then call that with the meterpreter dll

lib/rex/payloads/meterpreter/patch.rb

@@ -18,7 +18,7 @@ module Rex
 
         # Replace the URL
         def self.patch_url!(blob, url)
-          patch_string!(blob, "https://#{"X" * 256}", url)
+          patch_string!(blob, "https://#{'X' * 512}", url)
         end
 
         # Replace the session expiration timeout