aurbano/deobfuscator.js

## deobfuscator.js
<!DOCTYPE html>
<html><head>
    <title>Obfuscated name remapper</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <style type="text/css">
        body {
            background: white;
            color: black;
            font-family: "Trebuchet MS",Helvetica,Tahoma,Arial,sans-serif;
            font-size: 90.01%;
            font-weight: normal;
            line-height: 150%;
            min-width: 680px;
            padding: 0 3em;
            text-align: left;
        }
        h1, h2, h3 {
            line-height: 125%;
            margin-bottom: 0.9em;
        }
        h1 {
            font-size: 1.2em;
        }
        em {
            white-space: nowrap;
        }
        .taContnr > label:after {
            content:"\a";
            white-space: pre;
        }
        textarea {
            width: 80%;
            height: 30vh;
            white-space: pre;
            word-wrap: normal;
            overflow-x: scroll;
        }
        #errDisplay {
            background: pink;
            border: 3px solid darkred;
            border-radius: 0.5ex;
            margin: 0 1em;
            padding: 0.5ex 1em;
            display: none;
        }
        #errDisplay > pre {
            white-space: pre-line;
        }
    </style>
</head><body>

<h1>This page assumes/requires array-mapped functions/code <b><em>after</em></b> it has been run
    through <a href="http://jsbeautifier.org/">jsbeautifier.org</a> with the <em>Detect packers and obfuscators</em>
    and the <em>Unescape printable chars</em> options set.
</h1>
<h2 id="errDisplay">Error message goes here</h2>
<p class="taContnr">
    <label for="inpTxt">Paste jsBeautified code here:</label>
    <textarea id="inpTxt"></textarea>
</p>
<button id="remapBtn">Attempt Remap</button>
<p class="taContnr">
    <label for="rezTxt">Remapped code:</label>
    <textarea id="rezTxt"></textarea>
</p>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready (jQueryMain);

function jQueryMain () {
    $("#remapBtn").click ( function () {
        $("#errDisplay").hide ();
        var beautySrcRaw    = $("#inpTxt").val ().trim ();

        //--- Attempt to ensure that the key array is all on one line:
        var J = 0, LGI  = 0;
        var btyExArry;
        var beautySrc       = "";
        var btyLineRegEx    = /(.+), *\n/g;

        while (btyExArry    = btyLineRegEx.exec (beautySrcRaw) ) {
            if (btyExArry.index != LGI)
                break;

            beautySrc      += btyExArry[1] + ', ';
            //console.log (++J, btyExArry[1]);
            LGI             = btyLineRegEx.lastIndex;
            //console.log (++J, btyExArry.index, LGI);
        }
        beautySrc          += beautySrcRaw.slice (LGI);
        //console.log (beautySrc);

        //--- Extract the key array.
        var keyArryEgEx     = /^(?:var)?\s*([_\w]+)\s*=\s*(\[.+?\]);?\s*$/gm;
        var keyArrayMtch    = keyArryEgEx.exec (beautySrc);
        //console.log ("keyArrayMtch: ", keyArrayMtch);
        if ( ! keyArrayMtch) {
            reportError (
                'Unexpected format. Require key array to be up top. EG:' +
                '<pre>var _0xf17f = ["(", ")", "div", ...]</pre>'
            );
            return;
        }
        var keyVarName  = keyArrayMtch[1];
        var keyArry;

        //console.log (keyArrayMtch[2]);
        try {
            //JSON safer but string sometimes uses ' vs " and throws an exception.
            //keyArry     = JSON.parse (keyArrayMtch[2]);
            keyArry     = eval (keyArrayMtch[2]);
        }
        catch (err) {
            reportError (
                err.message + '\nReference:\n' +
                '<pre>' + keyArrayMtch[2].replace (/[^\.\?^\w()\[\]+,;\"\'\\\/\s-]/g, "@") + '</pre>'
            );
            return;
        }
        if ( ! Array.isArray (keyArry) ) {
            reportError (
                'Not an array:' +
                '<pre>' + keyArrayMtch[2].replace (/[^\.\?^\w()\[\]+,;\"\'\\\/\s-]/g, "@") + '</pre>'
            );
            return;
        }
        beautySrc       = beautySrc.slice (keyArryEgEx.lastIndex).trim ();

        /*--- Replace all of the array terms.  Do function calls first, then plain variable references.
            First pass:  document[_0xf17f[3]](...)  ==>  document.createElement(...)
            Second pass: _0xf17f[5]                 ==> "Student_name"
        */
        var nameRegex   = new RegExp (keyVarName + '\\s*\\[\\s*(\\d+)\\s*\\]', 'g');
        var funcRegex   = new RegExp ('\\[\\s*' + keyVarName + '\\s*\\[\\s*(\\d+)\\s*\\]\\s*\\]\\s*\\(', 'g');
        //console.log ("funcRegex: ", funcRegex);

        var replacedSrc = beautySrc.replace (funcRegex, function (matchStr, p1Str) {
            return '.' + keyArry[ parseInt (p1Str, 10) ] + ' (';
        } );

        replacedSrc     = replacedSrc.replace (nameRegex, function (matchStr, p1Str) {
            return '"' + keyArry[ parseInt (p1Str, 10) ] + '"';
        } );

        $("#rezTxt").text (replacedSrc);
    } );
}

function reportError (errHTML) {
    $("#errDisplay").show ().html (errHTML);
}
</script>
</body></html>
	<!DOCTYPE html>
	<html><head>
	<title>Obfuscated name remapper</title>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<style type="text/css">
	body {
	background: white;
	color: black;
	font-family: "Trebuchet MS",Helvetica,Tahoma,Arial,sans-serif;
	font-size: 90.01%;
	font-weight: normal;
	line-height: 150%;
	min-width: 680px;
	padding: 0 3em;
	text-align: left;
	}
	h1, h2, h3 {
	line-height: 125%;
	margin-bottom: 0.9em;
	}
	h1 {
	font-size: 1.2em;
	}
	em {
	white-space: nowrap;
	}
	.taContnr > label:after {
	content:"\a";
	white-space: pre;
	}
	textarea {
	width: 80%;
	height: 30vh;
	white-space: pre;
	word-wrap: normal;
	overflow-x: scroll;
	}
	#errDisplay {
	background: pink;
	border: 3px solid darkred;
	border-radius: 0.5ex;
	margin: 0 1em;
	padding: 0.5ex 1em;
	display: none;
	}
	#errDisplay > pre {
	white-space: pre-line;
	}
	</style>
	</head><body>

	<h1>This page assumes/requires array-mapped functions/code <b><em>after</em></b> it has been run
	through <a href="http://jsbeautifier.org/">jsbeautifier.org</a> with the <em>Detect packers and obfuscators</em>
	and the <em>Unescape printable chars</em> options set.
	</h1>
	<h2 id="errDisplay">Error message goes here</h2>
	<p class="taContnr">
	<label for="inpTxt">Paste jsBeautified code here:</label>
	<textarea id="inpTxt"></textarea>
	</p>
	<button id="remapBtn">Attempt Remap</button>
	<p class="taContnr">
	<label for="rezTxt">Remapped code:</label>
	<textarea id="rezTxt"></textarea>
	</p>

	<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
	<script type="text/javascript">
	$(document).ready (jQueryMain);

	function jQueryMain () {
	$("#remapBtn").click ( function () {
	$("#errDisplay").hide ();
	var beautySrcRaw = $("#inpTxt").val ().trim ();

	//--- Attempt to ensure that the key array is all on one line:
	var J = 0, LGI = 0;
	var btyExArry;
	var beautySrc = "";
	var btyLineRegEx = /(.+), *\n/g;

	while (btyExArry = btyLineRegEx.exec (beautySrcRaw) ) {
	if (btyExArry.index != LGI)
	break;

	beautySrc += btyExArry[1] + ', ';
	//console.log (++J, btyExArry[1]);
	LGI = btyLineRegEx.lastIndex;
	//console.log (++J, btyExArry.index, LGI);
	}
	beautySrc += beautySrcRaw.slice (LGI);
	//console.log (beautySrc);

	//--- Extract the key array.
	var keyArryEgEx = /^(?:var)?\s([_\w]+)\s=\s(\[.+?\]);?\s$/gm;
	var keyArrayMtch = keyArryEgEx.exec (beautySrc);
	//console.log ("keyArrayMtch: ", keyArrayMtch);
	if ( ! keyArrayMtch) {
	reportError (
	'Unexpected format. Require key array to be up top. EG:' +
	'<pre>var _0xf17f = ["(", ")", "div", ...]</pre>'
	);
	return;
	}
	var keyVarName = keyArrayMtch[1];
	var keyArry;

	//console.log (keyArrayMtch[2]);
	try {
	//JSON safer but string sometimes uses ' vs " and throws an exception.
	//keyArry = JSON.parse (keyArrayMtch[2]);
	keyArry = eval (keyArrayMtch[2]);
	}
	catch (err) {
	reportError (
	err.message + '\nReference:\n' +
	'<pre>' + keyArrayMtch[2].replace (/[^\.\?^\w()\[\]+,;\"\'\\\/\s-]/g, "@") + '</pre>'
	);
	return;
	}
	if ( ! Array.isArray (keyArry) ) {
	reportError (
	'Not an array:' +
	'<pre>' + keyArrayMtch[2].replace (/[^\.\?^\w()\[\]+,;\"\'\\\/\s-]/g, "@") + '</pre>'
	);
	return;
	}
	beautySrc = beautySrc.slice (keyArryEgEx.lastIndex).trim ();

	/*--- Replace all of the array terms. Do function calls first, then plain variable references.
	First pass: document[_0xf17f[3]](...) ==> document.createElement(...)
	Second pass: _0xf17f[5] ==> "Student_name"
	*/
	var nameRegex = new RegExp (keyVarName + '\\s\\[\\s(\\d+)\\s*\\]', 'g');
	var funcRegex = new RegExp ('\\[\\s' + keyVarName + '\\s\\[\\s(\\d+)\\s\\]\\s\\]\\s\\(', 'g');
	//console.log ("funcRegex: ", funcRegex);

	var replacedSrc = beautySrc.replace (funcRegex, function (matchStr, p1Str) {
	return '.' + keyArry[ parseInt (p1Str, 10) ] + ' (';
	} );

	replacedSrc = replacedSrc.replace (nameRegex, function (matchStr, p1Str) {
	return '"' + keyArry[ parseInt (p1Str, 10) ] + '"';
	} );

	$("#rezTxt").text (replacedSrc);
	} );
	}

	function reportError (errHTML) {
	$("#errDisplay").show ().html (errHTML);
	}
	</script>
	</body></html>