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msafe

通过劫持Zend底层编译opcode,可以分析php执行的代码,从而达到还原部分混淆加密的php源码,检测网站木马加入日志,禁用危险方法,禁用特定目录PHP文件的执行。

Update: (2017-08-05)

1.增加PHP7支持
2.增加system(),passthru(),exec(),shell_exec(),proc_open(),popen()支持
3.增加msafe.log_path自定义检测到危险函数时日志存储路径
4.增加msafe.disable_found 设置当检测到上述方法或者eval时是否执行
5.增加msafe.disable_path 设置禁止执行php的目录,如 upload 等

编译和安装

cd ***/msafe

phpize

./configure --with-msafe

make

make install

编译完成msafe.so加入php.ini

extension=msafe.so

msafe.enable_msafe = 1 或 0
msafe.log_path=/tmp/log.log 自定义记录路径
msafe.disable_found=1 禁止执行检测到的方法和eval()
msafe.disable_path=/aaa,/bbb

使用

1.当包含以上函数的代码执行后,会在log_path指定的文件中记录执行文件的路径,行数,参数,时间等,以判断是否为可疑木马文件。
2.当利用eval,正则/e修饰符混淆加密的文件执行时,会记录所执行的真实源码。
3.设置禁用危险函数后,上述函数不会执行。
4.设置禁止执行PHP的目录后,该目录下的php文件不会执行。

感谢:

1.参考借鉴了鸟哥taint https://github.com/laruence/taint

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