add warning when dumping ntds

Author: mpgn

cme/crackmapexec.py

@@ -260,6 +260,11 @@ def main():
                 module_server.start()
                 setattr(protocol_object, 'server', module_server.server)
 
+    if (args.ntds and not args.userntds):
+        ans = input(highlight('[!] Dumping the ntds can crash the DC on Windows Server 2019. Use the option --user <user> to dump a specific user safely [Y/n] ', 'red'))
+        if ans.lower() not in ['y', 'yes', '']:
+            sys.exit(1)
+
     try:
         asyncio.run(
             start_threadpool(protocol_object, args, db, targets, jitter)