码农的黑客反击战（二）

2024年5月19日 162次阅读 来源: codergarden

媒介

近来阿里云的效劳器被黑客黑了做成了肉鸡，上传一次发明特地清算过一次（http://www.toutiao.com/i63432…），当时就觉得能够没有消灭清洁，果真，背面几天天天都邑收到阿里云的报警短信，详细病症主如果ssh客户端衔接不上，登录阿里云控制台重启以后就能够连，但几个小时后上面跑的效劳却是一般的。所以一向也没有顾上管，本日抽闲又去清算了一次。

处置惩罚

1.处置惩罚云背景报警信息：
依据云背景报警信息，提醒有后门顺序存在,依据提醒查找响应目次，找到后门顺序并删除：

root@iZ25lwdric8Z:/usr/bin# pyth pythno python python2 python2.7 python3 python3.4 python3.4m python3m
root@iZ25lwdric8Z:/usr/bin/bsd-port# ls knerl knerl.conf

2.删除感染文件
在阿里云的背景正告里还发明有下载病毒文件的提醒，依据提醒查找响应文件。 [图片] 厥后在boot目次下发明一堆非常文件，悉数删除。

/boot abi-3.13.0-32-generic -rwxr-xr-x 1 root root 274808 Oct 7 15:53 aozxzdbfis* -rwxr-xr-x 1 root root 274808 Oct 15 19:37 bbavuhdmri* -rwxr-xr-x 1 root root 0 Oct 15 20:00 bgnqzgbufn* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 bumcwykrjj* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 cnpplnjcdd* -rw-r--r-- 1 root root 75 Oct 31 12:32 conf.n -rwxr-xr-x 1 root root 274808 Oct 7 15:53 dwneynlzyw* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 efrmetpcgd* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 egxrqjimuy* -rwxr-xr-x 1 root root 4096 Oct 15 18:24 extmulioke* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 eyhzuvhhij* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 fgbioungdb* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 fhuggtmbig* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 fjxgrbljjd* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 fkmnpxquvu* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 godghrbbwy* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 gsugoboncy* -rwxr-xr-x 1 root root 0 Oct 15 20:41 gwexawpbty* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 hlkzmtramm* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 hygzlbpcfz* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 iamglpkedb* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 iavtgffmgw* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 ighesktgdm* -rwxrwxrwx 1 root root 1135000 Oct 22 10:11 iss* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 jalbglrytg* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 jeygefcens* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 jtswtstxcr* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 jutumokmfy* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 jyajufvmib* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 keuvizznlm* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 khlcattweq* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 kiwwpjblkl* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 kmrwbpxybh* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 llybvcogsm* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 lsubdmnzih* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 mafvoardpz* -rwxr-xr-x 1 root root 274808 Oct 15 17:45 nimtgldgak* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 nmcqjdvbnh* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 nnejyawlfq* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 nptabkovas* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 nuwwochtfg* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 nxzytjppby* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 oszqgzlqxf* -rwxr-xr-x 1 root root 0 Oct 15 20:49 oyowzphnsm* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 oznxksrmyy* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 pfwzluoxiu* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 pjpjgogzgo* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 puqatevzxr* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 qiayvbpmyn* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 raqifowtpw* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 rczvtbutzz* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 rftjduumvo* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 rgfyuwrcqd* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 sqvaooipmd* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 svszkutrqk* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 szfecatvio* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 thiibkmxvd* -rwxr-xr-x 1 root root 274808 Oct 15 17:08 tyudkxnzrs* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 umalggzxer* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 umuoguvill* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 uwmxnnrjvf* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 vaidcxajat* -rwxr-xr-x 1 root root 274808 Oct 7 15:45 vsoiostmjo* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 wflcktfpdt* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 wgswdcxppz* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 wljgdutvlw* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 ydeferhoaj* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 ysjmydgyhg* -rwxr-xr-x 1 root root 274808 Oct 7 15:53 zvyfyvqbse*

找到并删除下载的病毒文件iss，删除时提醒没有操纵权限，修正文件权限后一般删除。

root@iZ25lwdric8Z:/boot# rm -f iss rm: cannot remove ‘iss’: Operation not permitted
root@iZ25lwdric8Z:/boot# lsattr iss ----i--------e-- iss
root@iZ25lwdric8Z:/boot# chattr -i iss root@iZ25lwdric8Z:/boot# lsattr iss -------------e-- iss root@iZ25lwdric8Z:/boot# rm -f iss

3.处置惩罚肉鸡行动
码农的黑客反击战（二）

头几天阿里云背景还报警过肉鸡行动，继承找体系里可疑的文件，厥后在启动文件rc.local中发明末了一行DDosClient敕令，很明显，这应该是被人当作肉鸡，用来提议DDos进击。删除。

PATH=/sbin:/usr/sbin:/bin:/usr/bin
. /lib/init/vars.sh . /lib/lsb/init-functions
do_start() { if [ -x /etc/rc.local ]; then [ "$VERBOSE" != no ] && log_begin_msg "Running local boot scripts (/etc/rc.local)" /etc/rc.local ES=$? [ "$VERBOSE" != no ] && log_end_msg $ES return $ES fi }
case "$1" in start) do_start ;; restart|reload|force-reload) echo "Error: argument '$1' not supported" >&2 exit 3 ;; stop) ;; *) echo "Usage: $0 start|stop" >&2 exit 3 ;; esacDDosClient &

然后在文件体系中查找DDosClient文件，并删除

root@iZ25lwdric8Z:/# find -name DDosClient ./opt/dt/DDosClient

4.运用杀毒软件
下载杀毒软件，运用杀毒软件再清算一次。ClamAV装置申明。通盘扫描后，果真发明17个被感染文件。

----------- SCAN SUMMARY ----------- Known viruses: 5018129 Engine version: 0.99.2 Scanned directories: 50605 Scanned files: 215736 Infected files: 17 Total errors: 14166 Data scanned: 13729.61 MB Data read: 16311.49 MB (ratio 0.84:1) Time: 1933.999 sec (32 m 13 s)
这些是被删除的感染文件。
/var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/bin/ps: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/bin/ps: Removed. /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/bin/netstat: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/bin/netstat: Removed. /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/usr/bin/bsd-port/getty: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/usr/bin/bsd-port/getty: Removed. /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/usr/bin/.sshd: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/usr/bin/.sshd: Removed. /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/usr/bin/lsof: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/usr/bin/lsof: Removed. /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/etc/aipok: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/66b7e760fc98049ff109fa4b6a4f1d71ce2e4822e77fdeb722836675c232c62d/etc/aipok: Removed. /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/bin/ps: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/bin/ps: Removed. /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/bin/netstat: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/bin/netstat: Removed. /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/A2: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/A2: Removed. /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/root/fu: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/root/fu: Removed. /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/root/ltma: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/root/ltma: Removed. /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/usr/bin/bsd-port/getty: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/usr/bin/bsd-port/getty: Removed. /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/usr/bin/.sshd: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/usr/bin/.sshd: Removed. /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/usr/bin/lsof: Unix.Trojan.Agent-37008 FOUND /var/lib/docker/aufs/diff/21f65507d020e17628e0b722b8535260115288a7f1dfe42337aff054449563b2/usr/bin/lsof: Removed.

跋文

经由此次清算，也不敢保证已完整清算清洁了。上次清算完装置了防火墙，此次检察也没有发明非常。后继继承视察。

    原文作者：codergarden
    原文地址: https://segmentfault.com/a/1190000007405240
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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