Reported on the avast! forums, a site recently got hacked and was redirecting users. Based on the Sucuri and VirusTotal results Pondus gave, I decided to dig a little deeper. I found the following in the HTML return for the hacked site:

Which can be beautified as follows:

Well look at that! Some HTML if the user has scripts disabled. And look at that! An .asp file for an image tag. Suspicious, no?

There is also a script tag for those who do run scripts. I sent the URL to JSunpack.

The unreadable code strikes again.. I have parsed it into readable content:

The following checks for specifics, then generates a cookie based on the returns. Shortly after, the document is fed an invisible image with a go.asp?… At least one antivirus should’ve considered this suspicious..

Ok, but does it work? I sent the URL to urlQuery to confirm just that. Notice on the image preview it says “Connecting to web1.51.la”, which means that the exploit is live and active.

Below are the VirusTotal results, not detected by any antivirus..

Script Getter (As seen in Figure 2) | Script Original (As seen in Figure 3) | Script Beautified (As seen in Figure 4)

 

Could use the following syntax: Base([a/random-letter][4-random-numbers])Mix([2-random-letters])

~!Donovan

Advertisements