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Added various options to the 'Defang URL' operation.

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n1474335 2018-11-07 13:23:05 +00:00
parent 253346a201
commit 53c500eb1b
6 changed files with 100 additions and 28 deletions
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77
src/core/operations/DefangURL.mjs
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@ -1,10 +1,12 @@
/**
* @author arnydo [arnydo@protonmail.com]
* @copyright Crown Copyright 2016
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2018
* @license Apache-2.0
*/
import Operation from "../Operation";
import {URL_REGEX, DOMAIN_REGEX} from "../lib/Extract";
/**
* DefangURL operation
@ -18,12 +20,33 @@ class DefangURL extends Operation {
super();
this.name = "Defang URL";
this.module = "URL";
this.description = "Takes a Universal Resource Locator (URL) and 'Defangs' it; meaning, the URL becomes invalid and neutralizes the risk of accidentally clicking on a malicious link.<br><br>This is often used when dealing with malicious links or IOCs.<br><br>Works well when combined with the 'Extract URLs' operation.";
this.infoURL = "";
this.module = "Default";
this.description = "Takes a Universal Resource Locator (URL) and 'Defangs' it; meaning the URL becomes invalid, neutralising the risk of accidentally clicking on a malicious link.<br><br>This is often used when dealing with malicious links or IOCs.<br><br>Works well when combined with the 'Extract URLs' operation.";
this.infoURL = "https://isc.sans.edu/forums/diary/Defang+all+the+things/22744/";
this.inputType = "string";
this.outputType = "string";
this.args = [];
this.args = [
{
name: "Escape dots",
type: "boolean",
value: true
},
{
name: "Escape http",
type: "boolean",
value: true
},
{
name: "Escape ://",
type: "boolean",
value: true
},
{
name: "Process",
type: "option",
value: ["Valid domains and full URLs", "Only full URLs", "Everything"]
}
];
}
/**
@ -32,12 +55,48 @@ class DefangURL extends Operation {
* @returns {string}
*/
run(input, args) {
let defang = input.replace(/http/gi, "hxxp");
defang = defang.replace(/\./g, "[.]");
defang = defang.replace(/:\/\//g, "[://]");
return defang;
const [dots, http, slashes, process] = args;
switch (process) {
case "Valid domains and full URLs":
input = input.replace(URL_REGEX, x => {
return defangURL(x, dots, http, slashes);
});
input = input.replace(DOMAIN_REGEX, x => {
return defangURL(x, dots, http, slashes);
});
break;
case "Only full URLs":
input = input.replace(URL_REGEX, x => {
return defangURL(x, dots, http, slashes);
});
break;
case "Everything":
input = defangURL(input, dots, http, slashes);
break;
}
return input;
}
}
/**
* Defangs a given URL
*
* @param {string} url
* @param {boolean} dots
* @param {boolean} http
* @param {boolean} slashes
* @returns {string}
*/
function defangURL(url, dots, http, slashes) {
if (dots) url = url.replace(/\./g, "[.]");
if (http) url = url.replace(/http/gi, "hxxp");
if (slashes) url = url.replace(/:\/\//g, "[://]");
return url;
}
export default DefangURL;