Add dependency check for Impacket

modules/exploits/windows/smb/ms17_010_eternalblue_win8.py

@@ -1,11 +1,18 @@
 #!/usr/bin/env python2.7
 
-from metasploit import module
-from impacket import smb, ntlm
-from struct import pack
-from base64 import b64decode
 import sys
 import socket
+from struct import pack
+from base64 import b64decode
+
+try:
+    from impacket import smb, ntlm
+except ImportError:
+    no_impacket = True
+else:
+    no_impacket = False
+
+from metasploit import module
 
 metadata = {
     'name': 'MS17-010 EternalBlue SMB Remote Windows Kernel Pool Corruption for Win8+',
@@ -664,4 +671,8 @@ def exploit(args):
 
 
 if __name__ == '__main__':
+    if no_impacket:
+        module.log('Please install Impacket before continuing', 'error')
+        sys.exit(1)
+
     module.run(metadata, exploit)