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These are the user uploaded subtitles that are being translated: 1 00:00:00,360 --> 00:00:10,390 Writing an NSC script to unwrap offers script support on many topics since it is open source the scripts 2 00:00:10,390 --> 00:00:20,250 are constantly increasing by the day or even the existing scripts are improved therefore that means 3 00:00:20,250 --> 00:00:23,130 that you can write your own and map script. 4 00:00:23,160 --> 00:00:28,040 Now of course it may indeed be necessary if you can't find a script that is more relevant to a crawl 5 00:00:28,040 --> 00:00:36,930 that you want to do so all information about and map scripting engine or NSC can be found here and map 6 00:00:36,960 --> 00:00:48,080 that word on map scripts are written in the lua programming language if you're not necessarily familiar. 7 00:00:48,080 --> 00:00:53,530 I'll tell you that some rules must be followed when writing script. 8 00:00:53,680 --> 00:01:00,600 There are certain parts it must be included in the script and this is because then map runs each script 9 00:01:01,200 --> 00:01:05,070 in a certain sequence starting from the first line of the script. 10 00:01:06,050 --> 00:01:13,020 It'll run step by step according to the rules so a script that is not written correctly will fail. 11 00:01:14,600 --> 00:01:20,000 So when writing scripts will then map we don't have to write everything ourselves. 12 00:01:20,000 --> 00:01:27,920 There is an map API support which means that many processes that we will be using are already defined 13 00:01:27,930 --> 00:01:34,500 in map and we need to do is call the relevant process with the help of the map API. 14 00:01:37,790 --> 00:01:46,330 So you can access the map API libraries at this site. 15 00:01:46,370 --> 00:01:54,680 Now the NSC script consists of the following main paints the head description categories dependencies 16 00:01:54,860 --> 00:02:03,400 author license description field description field tells the subject of this script and what it does. 17 00:02:05,130 --> 00:02:12,100 Depending on the length and complexity of the script the description can be several lines think a brief 18 00:02:12,100 --> 00:02:14,260 summary would often be more understandable. 19 00:02:16,320 --> 00:02:26,090 Categories so the fields that the script is included in are specified so one or more fields can be included. 20 00:02:26,090 --> 00:02:31,880 There is no case sensitivity when specifying names for domains. 21 00:02:32,160 --> 00:02:35,070 You can go to and map dawg at this address. 22 00:02:37,280 --> 00:02:41,980 For example categories equals default discovery safe etc.. 23 00:02:44,690 --> 00:02:49,670 Author feel information about the person who wrote the script. 24 00:02:49,670 --> 00:02:53,240 Using an email address is not recommended. 25 00:02:55,380 --> 00:03:03,660 License for license information is required to use a script and all scripts use and map licenses because 26 00:03:04,000 --> 00:03:13,500 then map is open source software so it's efficient to specify the following in the script license equals. 27 00:03:13,500 --> 00:03:19,910 Same as in map we can look at this page to get that 28 00:03:24,450 --> 00:03:32,680 dependency fields so if there is another script in this field that will be used beforehand before the 29 00:03:32,680 --> 00:03:34,410 execution of the script. 30 00:03:34,450 --> 00:03:42,700 Gonna be specify here when writing scripts you should list the scripts that should work in advance according 31 00:03:42,700 --> 00:03:45,180 to the scenario that we have determined. 32 00:03:45,490 --> 00:03:55,390 For example dependencies equals SMB boot the rule the rules that will be executed in the script. 33 00:03:55,400 --> 00:04:03,840 Here are specified rules are lua commands that run in sequence and return true or false. 34 00:04:04,950 --> 00:04:10,260 So script must contain one or more of the following functions that determine when to run the script. 35 00:04:11,780 --> 00:04:28,150 3 rule a host rule that most words rule host work and post rule a so pre rule scripts are executed 1 36 00:04:28,640 --> 00:04:36,520 before any host is scanned in the script pre scan phase so after each host is scanned the hosts rule 37 00:04:36,520 --> 00:04:42,730 import rules scripts are executed most rule scripts run ones. 38 00:04:42,750 --> 00:04:49,550 After all the hosts your scan and a script can run in multiple stages if it has several rules. 39 00:04:51,440 --> 00:05:00,780 Three rule and post rule do not accept arguments post rule accepts a host table and can for example 40 00:05:00,840 --> 00:05:05,630 test the IP address or hostname of the destination port rule. 41 00:05:05,630 --> 00:05:16,270 Open open accepts a support table for any port and filtered or unfiltered port states port rules often 42 00:05:16,270 --> 00:05:24,960 test factors such as port number port status or listening service name when deciding a port and have 43 00:05:24,960 --> 00:05:34,030 example rules are shown in the section entitled rule the standard to choose between a pre rule or a 44 00:05:34,030 --> 00:05:42,960 post rule is if the script is doing computer discovery or other network operation then the pre rule 45 00:05:43,200 --> 00:05:44,430 should be used. 46 00:05:45,610 --> 00:05:50,680 Post rule is reserved for reporting data and statistics collected during scanning 47 00:05:55,710 --> 00:06:05,240 the action action is the heart of an NSC script the script preparation includes all instructions that 48 00:06:05,240 --> 00:06:07,610 must be executed in the port rule. 49 00:06:07,820 --> 00:06:19,280 Host rule or post rule triggers a lua function that accepts the same arguments as a rule the value returned 50 00:06:19,310 --> 00:06:28,360 by the action value can be a table of name value pairs a string or zero environment variables. 51 00:06:28,550 --> 00:06:37,010 So each script has its own set of environment variables script part obviously the script path script 52 00:06:37,040 --> 00:06:42,190 name is the name and this variable can be used in a debug output. 53 00:06:43,330 --> 00:06:53,880 Script Type 2 so since a script can have more than one rule function this environment variable indicates 54 00:06:53,940 --> 00:07:00,360 which rule has enabled the script which is very useful if the script wants to share some code between 55 00:07:00,360 --> 00:07:06,290 different script scanning phases. 56 00:07:06,340 --> 00:07:13,740 So how about some examples script writing now let's write an examples script and then scan with a script. 57 00:07:15,510 --> 00:07:26,960 So let's write a script to show if the DNS Board is on a raw so the script must be registered in this 58 00:07:26,960 --> 00:07:38,130 directory in order to be used by the end map program so open v M's open Kelly log any county user. 59 00:07:38,160 --> 00:07:44,440 Root password tour open terminal now write in leaf pad. 60 00:07:44,450 --> 00:07:57,660 User share and map scripts test that NFC course you can use it in another text editor will will speed 61 00:07:57,660 --> 00:08:03,060 up by using the notes I've prepared before so versus right. 62 00:08:03,050 --> 00:08:06,930 Head description equals. 63 00:08:07,060 --> 00:08:12,270 So this is a simple script example that determines if it DNS port is open or not. 64 00:08:12,280 --> 00:08:13,150 Right. 65 00:08:13,160 --> 00:08:18,040 Author equals non byte. 66 00:08:18,080 --> 00:08:19,500 Now let's write rule. 67 00:08:20,390 --> 00:08:25,670 So here our script will scan and list ESPN UDP ports on the target system. 68 00:08:25,670 --> 00:08:39,430 Rule what rule equals function most port return port dot protocol equals equals DCP and port dot state. 69 00:08:39,430 --> 00:08:49,300 Equals equals open return port dot protocol equals equals UDP and port dot state equals equals open 70 00:08:49,900 --> 00:08:58,740 and an action will list the results action equals function. 71 00:08:58,790 --> 00:09:02,840 Most port return this port is open 72 00:09:05,860 --> 00:09:08,290 bicyclists record what we do now. 73 00:09:08,340 --> 00:09:19,210 So on the command line and map script test then dot 0 dot to dot for P fifty three U.S. u s t press 74 00:09:19,210 --> 00:09:21,980 Enter okay. 75 00:09:22,010 --> 00:09:30,880 So as you can see our script works and the results were listed so the subject of scripts is completely 76 00:09:30,880 --> 00:09:38,500 dependent on your programming knowledge and your imagination so if you define what you want to do you 77 00:09:38,500 --> 00:09:44,760 will have completed really the most important stage the Internet's gonna help you with the rest well 78 00:09:44,800 --> 00:09:46,110 and help you with this anyway. 79 00:09:47,140 --> 00:09:51,150 So remember you can always contribute to end map by sharing your scripts. 9472