There are no common symptoms associated with this threat. Alert notifications from installed antivirus software may be the only symptoms.
Worm:Win32/Sirefef.gen!A is a component of Win32/Sirefef - a multi-component family of malware that moderates your Internet experience by changing search results and generating pay-per-click advertising revenue for its controllers. The family consists of multiple parts that perform different functions, such as downloading updates and additional components, hiding existing components, or performing a payload.
Caution:Win32/Sirefef is a dangerous threat that uses advanced stealth techniques in order to hinder its detection and removal. If you are infected with Sirefef, we recommend you take the following steps to remove this threat from your computer:
Before you begin you will need:
- A computer that is not infected and is connected to the Internet. You will use this computer to download a copy of the Microsoft Safety Scanner - A blank CD, DVD or USB drive. You will use this CD, DVD or USB drive to run the Scanner on your infected computer
Worm:Win32/Sirefef.gen!A connects to a remote host in order to download an executable file to the affected computer. In the wild, Worm:Win32/Sirefef.gen!A has been observed contacting the following remote host for this purpose: