Monday, 18 March 2013

Skype Malware Analysis

When i came back from work today and fired up Skype, multiple messages popped up immediately. Some of them in in English and some in Polish, but all leading to the same url with "pictures" of me ; oo. Another interesting fact was that all the messages came from people working at the same company (zomg APT alert ;D).

The messages looked like this:
Messages in English and Polish encouraging to visit the links
We check what is behind the url shortener:
zip file !
Crunchpress seems to be a 'hacked' website:
crunchpress image folder with some aditional content
Lets download and unzip it:
Oh noez! no pics just exe : (
Quick scan @ gives 7/44 and identifies the file as a dropper:
virustotal results
Not surprisingly it downloads something using HTTP protocol:
Actual bad stuff downloaded here
Let's see what we have there. First some quick geo localization request:
hi ho
Next a list of 'unwanted' domain names is downloaded (full list available here).