linux – ps输出中的`ps`和`bin / bash su`

我有一个共享服务器(amazon ec2 micro由bitnami提供)和一个Web应用程序(WordPress),它最近显示出低性能(具有相对稳定的流量和使用率).我看到apache2 / logs / access.log中唯一可疑的行是形式的

$tail --lines=1000 /opt/bitnami/apache2/logs/access_log
93.120.84.31 - - [06/Nov/2013:03:02:54 +0000] "POST /cgi-bin/php-cgi?%2D%64+%61%6C%6C%6F%77%5F%75%72%6C%5F%69%6E%63%6C%75%64%65%3D%6F%6E+%2D%64+%73%61%66%65%5F%6D%6F%64%65%3D%6F%66%66+%2D%64+%73%75%68%6F%73%69%6E%2E%73%69%6D%75%6C%61%74%69%6F%6E%3D%6F%6E+%2D%64+%64%69%73%61%62%6C%65%5F%66%75%6E%63%74%69%6F%6E%73%3D%22%22+%2D%64+%6F%70%65%6E%5F%62%61%73%65%64%69%72%3D%6E%6F%6E%65+%2D%64+%61%75%74%6F%5F%70%72%65%70%65%6E%64%5F%66%69%6C%65%3D%70%68%70%3A%2F%2F%69%6E%70%75%74+%2D%64+%63%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%63%67%69%2E%72%65%64%69%72%65%63%74%5F%73%74%61%74%75%73%5F%65%6E%76%3D%30+%2D%6E HTTP/1.1" 504 249

并在ps aux输出中

daemon   29369  0.0  0.2  17688  1500 ?        S    10:52   0:00 /bin/bash ./su 57.54
daemon   29377 30.5  0.0   1780   544 ?        R    10:52   3:14 ./ps 57.54 22

这些流程是什么,如果这是[已知]漏洞/漏洞,我该如何关闭它？我用google搜索this mention,但无法确定这是否适用于我的情况.

如果此问题属于其他SE网站,请在适当的时候帮我询问.

提前谢谢了！

UPDATE

来自@Ladadadada的提示,结果如下.是的,这是入侵.服务器停止,从每周备份重新启动(所有数据库和其他东西都在不同的驱动器上,我希望不会受到损害)并受到监控.
关于将来发生的事情以及如何防止这种情况的所有建议都值得赞赏.

对于ps proc：

$sudo ls -l /proc/30633/fd
total 0
lr-x------ 1 daemon daemon 64 2013-11-06 13:05 0 -> /dev/null
l-wx------ 1 daemon daemon 64 2013-11-06 13:05 1 -> pipe:[2010646]
l-wx------ 1 daemon daemon 64 2013-11-06 13:05 2 -> pipe:[1918347]
lr-x------ 1 daemon daemon 64 2013-11-06 13:05 255 -> /tmp/.ssh_auth/.b/.ssh_auth/.b/su
lr-x------ 1 daemon daemon 64 2013-11-06 13:05 3 -> /opt/bitnami/apache2/cgi-bin/php-cgi

for / bin / bash su proc

$sudo ls -l /proc/30641/fd | more
total 0
lr-x------ 1 daemon daemon 64 2013-11-06 13:04 0 -> /dev/null
l-wx------ 1 daemon daemon 64 2013-11-06 13:04 1 -> pipe:[2010646]
lrwx------ 1 daemon daemon 64 2013-11-06 13:04 10 -> socket:[5538939]
lrwx------ 1 daemon daemon 64 2013-11-06 13:04 100 -> socket:[5539029]
lrwx------ 1 daemon daemon 64 2013-11-06 13:04 101 -> socket:[5539030]
lr-x------ 1 daemon daemon 64 2013-11-06 13:04 3 -> /opt/bitnami/apache2/cgi-bin/php-cgi

还有很多.临时文件夹的内容：

/tmp/.ssh_auth/.b/.ssh_auth/.b$ll
total 1848
drwxr-xr-x 2 daemon daemon    4096 2013-11-06 13:04 ./
drwxr-xr-x 3 daemon daemon    4096 2013-11-06 01:34 ../
-rw-r--r-- 1 daemon daemon       0 2013-11-06 13:04 246.120.pscan.22
-rw-r--r-- 1 daemon daemon       0 2013-11-06 03:42 .a
-rwxr-xr-x 1 daemon daemon 1384518 2005-06-05 20:24 brute*
-rwxr-xr-x 1 daemon daemon    1161 2013-03-13 20:22 dns-pool*
-rwxr-xr-x 1 daemon daemon      73 2013-11-05 04:14 pass.txt*
-rwxr-xr-x 1 daemon daemon     154 2013-11-05 04:13 print*
-rwxr-xr-x 1 daemon daemon   16071 2012-08-12 16:19 ps*
-rwxr-xr-x 1 daemon daemon  453972 2011-03-21 15:15 ss*
-rwxr-xr-x 1 daemon daemon     520 2013-11-06 01:33 su*

更新2

在实例关闭后,与亚马逊一起获得第二名：

Hello,We have detected that your instance(s):
i-xxxxxxxx
have been behaving in the following way that is against our AWS Customer Agreement:
Port Scanning

-d allow_url_include=on -d safe_mode=off -d suhosin.simulation=on -d disable_functions="" -d open_basedir=none -d auto_prepend_file=php://input -d cgi.force_redirect=0 -d cgi.redirect_status_env=0

sudo ls -l /proc/29377/fd

sudo strace -f -p 29377 -s400