Trojan.Sirefef.HH is malicious Trojan horse from a Sirefef family, which has already managed to infect thousands of Windows users all around the world. Just like its other versions, Trojan.Sirefef.HH is responsible for executing harmful processes and dropping various infected files on victim's computer. Mostly, it is used to open the backdoors of the system and let other dangerous programs inside the system. Most of its victims don't realize that they have this threat on their computer.
Trojan.Sirefef.HH can be downloaded just like other cyber infections. This nasty Trojan can be installed together with free software, spam email attachments, after clicking malicious links or pop ups or visiting forbidden websites, such as the ones that are filled with adult content and similar. As soon as it gets there, it modifies system parameters and starts such unwanted activity as recording user's keystrokes to get sensitive information and send it to its home server. Note that Trojan.Sirefef.HH can be updated manually targeting only selected computers and may also download other malware infections, which can additionally cause more serious damage.
As you can see, Trojan.Sirefef.HH is a really serious infection that has various modules. However, scammers work on trying to hide their parasites, not block anti-virus programs, so you should run a full system scan with updated anti-malware program to remove Trojan.Sirefef.HH from your computer. For that we recommend using STOPzilla and SpyHunter.
Information added: 09/14/12 08:51;
information updated: 09/14/12 08:51