扫描目录下的php文件，是否含有木马特征

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#!/usr/bin/python#-*- encoding:UTF-8 -*-##### @package## @desc 扫描目录下的php文件，是否含有木马特征，注意，不是“木马扫描”## @useage python shell_check.py /your/web/path/ 1=是否递归###import osimport sysimport reimport timedef listdir(dirs,liston='0'):    flog = open(os.getcwd()+"/check_php_shell.log","a+")    if not os.path.isdir(dirs):        print "directory %s is not exist"% (dirs)        return    lists = os.listdir(dirs)    for list in lists:        filepath = os.path.join(dirs,list)        if os.path.isdir(filepath):            if liston == '1':                listdir(filepath,'1')        elif os.path.isfile(filepath):            filename = os.path.basename(filepath)            if re.search(r"\.(?:php|inc|html?)$", filename, re.IGNORECASE):                i = 0                iname = 0                f = open(filepath)                while f:                    file_contents = f.readline()                    if not file_contents:                        break                    i += 1                    match = re.search(r'''(?P<function>\b(?:include|require)(?:_once)?\b)\s*\(?\s*["'](?P<filename>.*?(?<!\.(?:php|inc)))["']''', file_contents, re.IGNORECASE| re.MULTILINE)                    if match:                        function = match.group("function")                        filename = match.group("filename")                        if iname == 0:                            info = '\n[%s] :\n'% (filepath)                        else:                            info = ''                        info += '\t|-- [%s] - [%s]  line [%d] \n'% (function,filename,i)                        flog.write(info)                        print info                        iname += 1                                         match = re.search(r'\b(?P<function>eval|proc_open|popen|shell_exec|exec|passthru|system)\b\s*\(', file_contents, re.IGNORECASE| re.MULTILINE)                    if match:                        function = match.group("function")                        if iname == 0:                            info = '\n[%s] :\n'% (filepath)                        else:                            info = ''                        info += '\t|-- [%s]  line [%d] \n'% (function,i)                        flog.write(info)                        print info                        iname += 1                                         match = re.findall(r'(\$[a-z0-9_]*?\s*?\(.*?\))', file_contents, re.IGNORECASE)                    if match:                        if iname == 0:                            info = '\n[%s] :\n'% (filepath)                        else:                            info = ''                        info += '\t|-- [%s]  line [%d] \n'% (match[0],i)                        flog.write(info)                        print info                        iname += 1                 f.close()    flog.close()if '__main__' == __name__:    argvnum = len(sys.argv)    liston = '0'    if argvnum == 1:        action = os.path.basename(sys.argv[0])        print "Command is like:\n   %s D:\wwwroot\ \n   %s D:\wwwroot\ 1    -- recurse subfolders"% (action,action)        quit()    elif argvnum == 2:        path = os.path.realpath(sys.argv[1])        listdir(path,liston)    else:        liston = sys.argv[2]        path = os.path.realpath(sys.argv[1])        listdir(path,liston)    flog = open(os.getcwd()+"/check_php_shell.log","a+")    ISOTIMEFORMAT='%Y-%m-%d %X'    now_time = time.strftime(ISOTIMEFORMAT,time.localtime())    flog.write("\n----------------------%s checked ---------------------\n"% (now_time))    flog.close()
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