A sample of the Malware was analysed and it was found that the variant tricks the victim to execute it by posing as an Internet Explorer document that included an icon similar to the Windows browser.The malware is detected as Trojan.Win32.Zbot. and the digital certificate seems to be from Swiss software company isonet which probably was stolen by hackers.The best way to stay protected from any such threat is to keep your Antivirus program up to date.