Trend Micro has released a report which gives some details about the automation of website hacking. Their report: http://blog.trendmicro.com/trendlabs-security-intelligence/new-blackos-software-package-sold-in-underground-forums/ set us off on a search for more information.
We found that this software allows hackers to manage large lists of stolen FTP credentials. The hackers can easily inject custom iframe code into compromised websites. The code can be modified to redirect visitors depending on their operating system (Mac, Windows, etc.), browser (Safari, FireFox, Internet Explorer, Chrome, etc.) and even different versions of those operating systems and browsers.
They can even customize their code to redirect based on the referrer (Google, Yahoo, Bing…) and country of origin.
When you see how the hackers talk about easily finding 10,000 websites, it becomes very alarming. One clip we found is this:
Approximately 15-20% have access to FTP SSH, you can also check behind mail + pass on base have access to FTP or SSH. – all accounts reviewed by our SSH server exploits to get root. With 10k SSH accounts you can get in the area of 500 root access to the servers!
What it appears they’re saying is that 15-20% of FTP accounts are also the credentials for SSH. If so, the hackers can gain “root” access via SSH.
Out of 10K accounts you can get about 500 with server root access! Simple backdoor is installed for all ‘root’s to elevate the rights for consequent access.
If you’re on a VPS or dedicated server, this type of access typically means complete server rebuild or reload. When they have root access it’s game over. They won.
Why do we bring this to your attention?
You have to constantly think about all the possible ways hackers have of getting into your server – always.
Frequently we see many FTP accounts created for the various websites on a VPS or dedicated server. If you’re going to host multiple websites on your server, please create a separate cPanel account for each site. That creates a separation between your sites.