Backdoor:MSIL/Sisbot.C is a kind of trojan virus. Its main purpose is to grant access to many other web threats into your computer system. At worst, Backdoor:MSIL/Sisbot.C allows hackers to access your PC remotely and establish total control of your system. Be aware that as long as Backdoor:MSIL/Sisbot.C is present on your PC a lot of malicious programs will be downloading: adware, PUPs, spyware, keyloggers, rogues and other backdoors. Moreover, the suspicious add-on will be installed in your browser and redirect you to the malicious domains each time when you’ll go online.