add php-extension-backdoor

php/php-extension-backdoor.md

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+author:akamajoris
+
+url:https://github.com/akamajoris/php-extension-backdoor
+
+Windows: http://stackoff.ru/pishem-rasshirenie-bekdor-dlya-php/
+
+Linux:
+sudo apt-get install php5-dev
+phpize && ./configure && make
+
+chmod  xxx.so
+copy xxx.so to /var/www
+
+edit php.ini
+add extension=/var/www/xxx.so
+restart apache
+
+test success!!  ^_^
+
+demo:http://drops.wooyun.org/tips/3003