Malware infection,again

[femdom]

My revive adserver installation is hacked.. I am not sure what to do and how to protect myself. I will need help with one answer (this is what my hosting company asked me ). This is what they say (and ask) to notify developers: Thank you in advance

1. that in those scripts below has vulnerabilities.
2. via those scripts hackers upload web shells to the server.
3. If those scripts are not a part of 'advertiser' then we need to remove them.

 

4473141 16 -rw-r--r-- 1 domains domains 14733 Apr 30 2014 ./deliveryLimitations/dump.php
4855755 16 -rw-r--r-- 1 domains domains 12522 Apr 30 2014 ./bannerTypeHtml/vastOverlayBannerTypeHtml/menu75.php
2229511 16 -rw-r--r-- 1 domains domains 13265 Apr 30 2014 ./bannerTypeHtml/footer.php
4863443 12 -rw-r--r-- 1 domains domains 12197 Apr 30 2014 ./etc/oxInvocationTags/dirs14.php
4861793 16 -rw-r--r-- 1 domains domains 13606 Apr 30 2014 ./etc/oxLogClick/alias24.php
4861973 16 -rw-r--r-- 1 domains domains 15381 Apr 30 2014 ./etc/Site/proxy.php
4456689 16 -rw-r--r-- 1 domains domains 12776 Apr 30 2014 ./deliveryLog/lib20.php
4853612 16 -rw-r--r-- 1 domains domains 12908 Apr 30 2014 ./videoAds/footer.php
after POST query into any of those files, in a file system appears the encoding scripts such advertisers/inc73.php across which the big botnet sends a tons of spam mails.

 

Thank you in advance