Malicious PACs and Bitcoins
Now cybercriminals from Brazil are also interested in Bitcoin currency. In order to join the horde of phishers on the lookout for the virtual currency they have applied their best malicious technique: malicious PAC on web attacks, and phishing domains.
The malicious usage of PAC (Proxy Auto-Config) among Brazilian black hats is not something new – we’ve known about it since 2007. Generally, these kind of malicious scripts are used to redirect the victim’s connection to a phishing page of banks, credit cards and so on. We described these attacks in detail here. In 2012 a Russian Trojan banker called Capper also started using the same technique. When it’s used in drive-by-download attacks, it becomes very effective.
After registering the domain java7update.com, Brazilian criminals started attacking several websites, inserting a malicious iframe in some compromised pages: