Linux应急响应检测脚本（挖矿/病毒检测）-极安网

挖矿病毒检测脚本

#!/bin/bash
echo "Linux安全检查与应急响应工具"
echo "Version:1.3"
echo "Author:Daily"
echo "Date:2020-11-11"
dos2unix buying.sh
date=$(date +%Y%m%d-%H%M%S)
ipadd=$(ifconfig -a | grep -w inet | grep -v 127.0.0.1 | awk 'NR==1{print $2}')
check_file="/tmp/buying_${ipadd}_${date}/check_file/"
danger_file="/tmp/buying_${ipadd}_${date}/danger_file.txt"
log_file="/tmp/buying_${ipadd}_${date}/log/"
rm -rf $check_file
rm -rf $danger_file
rm -rf log_file
mkdir /tmp/buying_${ipadd}_${date}/
echo "检查发现危险项,请注意:" > ${danger_file}
mkdir $check_file
echo "" >> $danger_file
mkdir $log_file
cd $check_file
if [ $(whoami) != "root" ];then
echo "安全检查必须使用root账号,否则某些项无法检查"
exit 1
fi
saveresult="tee -a checkresult.txt"
echo "[0.1]正在检查IP地址....." && "$saveresult"
echo -------------0.IP及版本-------------------
echo -------------0.1IP地址-------------------
echo "[0.1]正在检查IP地址....." | $saveresult
ip=$(ifconfig -a | grep -w inet | awk '{print $2}')
if [ -n "$ip" ];then
(echo "[*]本机IP地址信息:" && echo "$ip") | $saveresult
else
echo "[!!!]本机未配置IP地址" | $saveresult
fi
printf "\n" | $saveresult
echo ------------12历史命令--------------------------
echo ------------12.1系统操作历史命令---------------
echo ------------12.1.1系统操作历史命令---------------
echo "[12.1.1]正在检查操作系统历史命令....." | $saveresult
history=$(more /root/.bash_history)
if [ -n "$history" ];then
(echo "[*]操作系统历史命令如下:" && echo "$history") | $saveresult
else
echo "[!!!]未发现历史命令,请检查是否记录及已被清除" | $saveresult
fi
printf "\n" | $saveresult
echo ------------2.网络连接---------------------
echo "[2.1]正在检查网络连接情况....." | $saveresult
netstat=$(netstat -anlp | grep ESTABLISHED)
netstatnum=$(netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}')
if [ -n "$netstat" ];then
(echo "[*]网络连接情况:" && echo "$netstat") | $saveresult
if [ -n "$netstatnum" ];then
(echo "[*]各个状态的数量如下:" && echo "$netstatnum") | $saveresult
fi
else
echo "[*]未发现网络连接" | $saveresult
fi
printf "\n" | $saveresult
echo ------------20.2CPU分析-----------------
echo ------------20.2.1CPU情况-----------------
echo "[20.2.1]正在检查CPU相关信息....." | $saveresult
(echo "CPU硬件信息如下:" && more /proc/cpuinfo ) | $saveresult
(echo "CPU使用情况如下:" && ps -aux | sort -nr -k 3 | awk '{print $1,$2,$3,$NF}') | $saveresult
printf "\n" | $saveresult
echo ------------20.2.2占用CPU前5进程-----------------
echo "[20.2.2]正在检查占用CPU前5资源的进程....." | $saveresult
(echo "占用CPU资源前5进程：" && ps -aux | sort -nr -k 3 | head -5) | $saveresult
printf "\n" | $saveresult
echo ------------20.2.3占用CPU较大进程-----------------
echo "[20.2.3]正在检查占用CPU较大的进程....." | $saveresult
pscpu=$(ps -aux | sort -nr -k 3 | head -5 | awk '{if($3>=20) print $0}')
if [ -n "$pscpu" ];then
echo "[!!!]以下进程占用的CPU超过20%:" && echo "UID PID PPID C STIME TTY TIME CMD"
echo "$pscpu" | tee -a 20.2.3_pscpu.txt | tee -a $danger_file | $saveresult
else
echo "[*]未发现进程占用资源超过20%" | $saveresult
fi
printf "\n" | $saveresult
echo ------------7.进程分析--------------------
echo ------------7.1系统进程--------------------
echo "[7.1]正在检查进程....." | $saveresult
ps=$(ps -aux)
if [ -n "$ps" ];then
(echo "[*]系统进程如下:" && echo "$ps") | $saveresult
else
echo "[*]未发现系统进程" | $saveresult
fi
printf "\n" | $saveresult
echo "[7.2]正在检查守护进程....." | $saveresult
if [ -e /etc/xinetd.d/rsync ];then
(echo "[*]系统守护进程:" && more /etc/xinetd.d/rsync | grep -v "^#") | $saveresult
else
echo "[*]未发现守护进程" | $saveresult
fi
printf "\n" | $saveresult
echo ------------9.运行服务----------------------
echo "[9.1]正在检查运行服务....." | $saveresult
services=$(systemctl | grep -E "\.service.*running" | awk -F. '{print $1}')
if [ -n "$services" ];then
(echo "[*]以下服务正在运行：" && echo "$services") | $saveresult
else
echo "[!!!]未发现正在运行的服务！" | $saveresult
fi
printf "\n" | $saveresult
echo -------------4.启动项-----------------------
echo -------------4.1 用户自定义启动项-----------------------
echo "[4.1]正在检查用户自定义启动项....." | $saveresult
chkconfig=$(chkconfig --list | grep -E ":on|启用" | awk '{print $1}')
if [ -n "$chkconfig" ];then
(echo "[*]用户自定义启动项:" && echo "$chkconfig") | $saveresult
else
echo "[!!!]未发现用户自定义启动项" | $saveresult
fi
printf "\n" | $saveresult
echo -------------4.2 系统自启动项-----------------------
echo "[4.2]正在检查系统自启动项....." | $saveresult
systemchkconfig=$(systemctl list-unit-files | grep enabled | awk '{print $1}')
if [ -n "$systemchkconfig" ];then
(echo "[*]系统自启动项如下:" && echo "$systemchkconfig") | $saveresult
else
echo "[*]未发现系统自启动项" | $saveresult
fi
printf "\n" | $saveresult
echo -------------4.3 危险启动项-----------------------
echo "[4.3]正在检查危险启动项....." | $saveresult
dangerstarup=$(chkconfig --list | grep -E ":on|启用" | awk '{print $1}' | grep -E "\.(sh|per|py)$")
if [ -n "$dangerstarup" ];then
(echo "[!!!]发现危险启动项:" && echo "$dangerstarup") | tee -a $danger_file | $saveresult
else
echo "[*]未发现危险启动项" | $saveresult
fi
printf "\n" | $saveresult
echo ------------5.查看定时任务-------------------
echo ------------5.1系统定时任务分析-------------------
echo ------------5.1.1查看系统定时任务-------------------
echo "[5.1.1]正在分析系统定时任务....." | $saveresult
syscrontab=$(more /etc/crontab | grep -v "# run-parts" | grep run-parts)
if [ -n "$syscrontab" ];then
(echo "[!!!]发现存在系统定时任务:" && more /etc/crontab ) | tee -a $danger_file | $saveresult
else
echo "[*]未发现系统定时任务" | $saveresult
fi
printf "\n" | $saveresult
# if [ $? -eq 0 ]表示上面命令执行成功;执行成功输出的是0；失败非0
#ifconfig echo $? 返回0，表示执行成功
# if [ $? != 0 ]表示上面命令执行失败
echo ------------5.1.2分析系统可疑定时任务-------------------
echo "[5.1.2]正在分析系统可疑任务....." | $saveresult
dangersyscron=$(egrep "((chmod|useradd|groupadd|chattr)|((wget|curl)*\.(sh|pl|py)$))" /etc/cron*/* /var/spool/cron/*)
if [ $? -eq 0 ];then
(echo "[!!!]发现下面的定时任务可疑,请注意！！！" && echo "$dangersyscron") | tee -a $danger_file | $saveresult
else
echo "[*]未发现可疑系统定时任务" | $saveresult
fi
printf "\n" | $saveresult
echo ------------5.2分析用户定时任务-------------------
echo ------------5.2.1查看用户定时任务-------------------
echo "[5.2.1]正在查看用户定时任务....." | $saveresult
crontab=$(crontab -l)
if [ $? -eq 0 ];then
(echo "[!!!]发现用户定时任务如下:" && echo "$crontab") | $saveresult
else
echo "[*]未发现用户定时任务" | $saveresult
fi
printf "\n" | $saveresult
echo ------------5.2.2查看可疑用户定时任务-------------------
echo "[5.2.2]正在分析可疑用户定时任务....." | $saveresult
danger_crontab=$(crontab -l | egrep "((chmod|useradd|groupadd|chattr)|((wget|curl).*\.(sh|pl|py)))")
if [ $? -eq 0 ];then
(echo "[!!!]发现可疑定时任务,请注意！！！" && echo "$danger_crontab") | tee -a $danger_file | $saveresult
else
echo "[*]未发现可疑定时任务" | $saveresult
fi
printf "\n" | $saveresult
echo ------------6 最近24小时内变动的文件---------------------
#查看最近24小时内有改变的文件
(find / -mtime 0 | grep -E "\.(py|sh|per|pl|php|asp|jsp)$") | tee -a $danger_file | $saveresult
printf "\n" | $saveresult
echo ------------7 日志分析------------------------------
echo ------------7.1 查看日志配置与打包-------------------
echo ------------7.1.1 查看日志配置----------------------
echo "[7.1.1]正在查看日志配置....." | $saveresult
logconf=$(more /etc/rsyslog.conf | egrep -v "#|^$")
if [ -n "$logconf" ];then
(echo "[*]日志配置如下:" && echo "$logconf") | $saveresult
else
echo "[!!!]未发现日志配置文件" | tee -a $danger_file | $saveresult
fi
printf "\n" | $saveresult
echo ------------7.1.2日志是否存在---------------
echo "[7.1.2]正在分析日志文件是否存在....." | $saveresult
logs=$(ls -l /var/log/)
if [ -n "$logs" ];then
echo "[*]日志文件存在" | $saveresult
else
echo "[!!!]日志文件不存在,请分析是否被清除！" | tee -a $danger_file | $saveresult
fi
printf "\n" | $saveresult
echo ------------7.1.3 日志审核是否开启---------------
echo "[7.1.3]正在分析日志审核是否开启....." | $saveresult
service auditd status | grep running
if [ $? -eq 0 ];then
echo "[*]系统日志审核功能已开启,符合要求" | $saveresult
else
echo "[!!!]系统日志审核功能已关闭,不符合要求,建议开启日志审核。可使用以下命令开启:service auditd start" | tee -a $danger_file | $saveresult
fi
printf "\n" | $saveresult
echo ------------7.1.4 打包日志---------------
echo "[7.1.4]正在打包日志......" | $saveresult
zip -r ${log_file}system_log.zip /var/log/
if [ $? -eq 0 ];then
echo "[*]日志打包成功" | $saveresult
else
echo "[!!!]日志打包失败,请工人导出日志" | tee -a $danger_file | $saveresult
fi
printf "\n" | $saveresult
echo ------------7.3message日志分析---------------
echo ------------7.3.1传输文件--------------------
#下面命令仅显示传输的文件名,并会将相同文件名的去重
#more /var/log/message* | grep "ZMODEM:.*BPS" | awk -F '[]/]' '{print $0}' | sort | uniq
echo "[7.3.1]正在检查传输文件....." | $saveresult
zmodem=$(more /var/log/message* | grep "ZMODEM:.*BPS")
if [ -n "$zmodem" ];then
(echo "[!!!]传输文件情况:" && echo "$zmodem") | tee -a $danger_file | $saveresult
else
echo "[*]日志中未发现传输文件" | $saveresult
fi
printf "\n" | $saveresult
echo ------------7.4cron日志分析---------------
echo ------------7.4.1定时下载-----------------
echo "[7.4.1]正在分析定时下载....." | $saveresult
cron_download=$(more /var/log/cron* | grep "wget|curl")
if [ -n "$cron_download" ];then
(echo "[!!!]定时下载情况:" && echo "$cron_download") | tee -a $danger_file | $saveresult
else
echo "[*]未发现定时下载情况" | $saveresult
fi
printf "\n" | $saveresult
echo ------------7.4.2定时执行脚本-----------------
echo "[7.4.2]正在分析定时执行脚本....." | $saveresult
cron_shell=$(more /var/log/cron* | grep -E "\.py$|\.sh$|\.pl$")
if [ -n "$cron_shell" ];then
(echo "[!!!]发现定时执行脚本:" && echo "$cron_download") | tee -a $danger_file | $saveresult
else
echo "[*]未发现定时下载脚本" | $saveresult
fi
printf "\n" | $saveresult
echo ------------8sshd配置文件--------------------
echo ------------8.1sshd配置----------------------
echo "[13.5.1]正在检查sshd配置....." | $saveresult
sshdconfig=$(more /etc/ssh/sshd_config | egrep -v "#|^$")
if [ -n "$sshdconfig" ];then
(echo "[*]sshd配置文件如下:" && echo "$sshdconfig") | $saveresult
else
echo "[！]未发现sshd配置文件" | $saveresult
fi
printf "\n" | $saveresult

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Linux应急响应检测脚本（挖矿/病毒检测）

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