完美排查入侵者的 10 个方法和 1 个解决思路
发布作者:微思网络 发布时间:2023-04-23 浏览量:0次
[root@hlmcen69n3 ~]# ll -h /var/log/*
-rw-------. 1 root root 2.6K Jul 7 18:31 /var/log/anaconda.ifcfg.log
-rw-------. 1 root root 23K Jul 7 18:31 /var/log/anaconda.log
-rw-------. 1 root root 26K Jul 7 18:31 /var/log/anaconda.program.log
-rw-------. 1 root root 63K Jul 7 18:31 /var/log/anaconda.storage.log
[root@hlmcen69n3 ~]# du -sh /var/log/*
8.0K /var/log/anaconda
4.0K /var/log/anaconda.ifcfg.log
24K /var/log/anaconda.log
28K /var/log/anaconda.program.log
64K /var/log/anaconda.storage.log
[root@hlmcen69n3 ~]# ll /etc/pass*
-rw-r--r--. 1 root root 1373 Sep 15 11:36 /etc/passwd
-rw-r--r--. 1 root root 1373 Sep 15 11:36 /etc/passwd-
[root@hlmcen69n3 ~]# ll /etc/sha*
----------. 1 root root 816 Sep 15 11:36 /etc/shadow
----------. 1 root root 718 Sep 15 11:36 /etc/shadow-
[root@hlmcen69n3 ~]# more /etc/passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
[root@hlmcen69n3 ~]# more /etc/shadow
root:*LOCK*:14600::::::
bin:*:17246:0:99999:7:::
daemon:*:17246:0:99999:7:::
[root@hlmcen69n3 ~]# lastlog
Username Port From Latest
root **Never logged in**
bin **Never logged in**
daemon **Never logged in**
[root@hlmcen69n3 ~]# who
stone pts/0 2017-09-20 16:17 (X.X.X.X)
test01 pts/2 2017-09-20 16:47 (X.X.X.X)
[root@hlmcen69n3 ~]# last
test01 pts/1 X.X.X.X Wed Sep 20 16:50 still logged in
test01 pts/2 X.X.X.X Wed Sep 20 16:47 - 16:49 (00:02)
stone pts/1 X.X.X.X Wed Sep 20 16:46 - 16:47 (00:01)
stone pts/0 X.X.X.X Wed Sep 20 16:17 still logged in
[root@hlmcen69n3 ~]# ac -dp
stone 11.98
Sep 15 total 11.98
stone 67.06
Sep 18 total 67.06
stone 1.27
test01 0.24
Today total 1.50
[root@hlmcen69n3 ~]# cat /var/log/secure | grep -i "accepted password"
Sep 20 12:47:20 hlmcen69n3 sshd[37193]: Accepted password for stone from X.X.X.X port 15898 ssh2
Sep 20 16:17:47 hlmcen69n3 sshd[38206]: Accepted password for stone from X.X.X.X port 9140 ssh2
Sep 20 16:46:00 hlmcen69n3 sshd[38511]: Accepted password for stone from X.X.X.X port 2540 ssh2
Sep 20 16:47:16 hlmcen69n3 sshd[38605]: Accepted password for test01 from X.X.X.X port 10790 ssh2
Sep 20 16:50:04 hlmcen69n3 sshd[38652]: Accepted password for test01 from X.X.X.X port 28956 ssh2
[root@hlmcen69n3 ~]# ll /proc/1850/ | grep -i exe
lrwxrwxrwx. 1 root root 0 Sep 15 12:31 exe -> /usr/bin/python
[root@hlmcen69n3 ~]# ll /usr/bin/python
-rwxr-xr-x. 2 root root 9032 Aug 18 2016 /usr/bin/python
[root@hlmcen69n3 ~]# ll /var/log/secure
ls: cannot access /var/log/secure: No such file or directory
[root@hlmcen69n3 ~]# lsof | grep /var/log/secure
rsyslogd 1264 root 4w REG
8,1 3173904 263917 /var/log/secure (deleted)
[root@hlmcen69n3 ~]# tail /proc/1264/fd/4
Sep 20 16:47:21 hlmcen69n3 sshd[38511]: pam_unix(sshd:session): session closed for user stone
Sep 20 16:47:21 hlmcen69n3 su: pam_unix(su-l:session): session closed for user root
Sep 20 16:49:30 hlmcen69n3 sshd[38605]: pam_unix(sshd:session): session closed for user test01
Sep 20 16:50:04 hlmcen69n3 sshd[38652]: reverse mapping checking getaddrinfo for 190.78.120.106.static.bjtelecom.net [106.120.78.190] failed - POSSIBLE BREAK-IN ATTEMPT!
Sep 20 16:50:04 hlmcen69n3 sshd[38652]: Accepted password for test01 from 106.120.78.190 port 28956 ssh2
Sep 20 16:50:05 hlmcen69n3 sshd[38652]: pam_unix(sshd:session): session opened for user test01 by (uid=0)
Sep 20 17:18:51 hlmcen69n3 unix_chkpwd[38793]: password check failed for user (root)
Sep 20 17:18:51 hlmcen69n3 sshd[38789]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.15.81.90 user=root
Sep 20 17:18:52 hlmcen69n3 sshd[38789]: Failed password for root from 51.15.81.90 port 47014 ssh2
Sep 20 17:18:52 hlmcen69n3 sshd[38790]: Connection closed by 51.15.81.90
[root@hlmcen69n3 ~]# cat /proc/1264/fd/4 > /var/log/secure
[root@hlmcen69n3 ~]# ll /var/log/secure
-rw-r--r--. 1 root root 3173904 Sep 20 17:24 /var/log/secure
[root@hlmcen69n3 ~]# head /var/log/secure
Sep 17 03:28:15 hlmcen69n3 sshd[13288]: reverse mapping checking getaddrinfo for 137-64-15-51.rev.cloud.scaleway.com [51.15.64.137] failed - POSSIBLE BREAK-IN ATTEMPT!
Sep 17 03:28:15 hlmcen69n3 unix_chkpwd[13290]: password check failed for user (root)
Sep 17 03:28:15 hlmcen69n3 sshd[13288]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.15.64.137 user=root
Sep 17 03:28:17 hlmcen69n3 sshd[13288]: Failed password for root from 51.15.64.137 port 59498 ssh2
Sep 17 03:28:18 hlmcen69n3 sshd[13289]: Received disconnect from 51.15.64.137: 11: Bye Bye
Sep 17 03:28:22 hlmcen69n3 sshd[13291]: reverse mapping checking getaddrinfo for 137-64-15-51.rev.cloud.scaleway.com [51.15.64.137] failed - POSSIBLE BREAK-IN ATTEMPT!
Sep 17 03:28:22 hlmcen69n3 unix_chkpwd[13293]: password check failed for user (root)
Sep 17 03:28:22 hlmcen69n3 sshd[13291]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.15.64.137 user=root
Sep 17 03:28:24 hlmcen69n3 sshd[13291]: Failed password for root from 51.15.64.137 port 37722 ssh2
Sep 17 03:28:25 hlmcen69n3 sshd[13292]: Received disconnect from 51.15.64.137: 11: Bye Bye