Threat description




Virus:W32/Ramnit is a family of viruses that infect EXE, DLL and HTML files found on the computer. Depending on the variant, Ramnit-infected machines can also be enslaved in a botnet.


Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

The Virus:W32/Ramnit family first appeared in 2010 as simple file-infecting viruses. Over time, it has been developed and modified so that newer variants include the ability to serve as a backdoor and to communicate with a command and control (C&C) server, allowing an attacker to control a botnet of Ramnit-infected machines.

The combined resources of the Ramnit botnet allows it to be used by its controller(s) to perform other malicious actions, notably stealing personal and banking information. In early 2015, the Ramnit botnet was affected by a Europol takedown operation. For more information on the takedown, see:


Virus:W32/Ramnit variants are typically distributed in infected removable drives; in infected EXE, DLL or HTML files; by exploit kits hosted on compromised or malicious sites; or as part of the payload of other malware.

For a representative example of a Ramnit variant, see:

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