16 April 2015

The United States Department of Homeland Security, Federal Bureau of Investigation and Interpol have warned that more than 770,000 computers worldwide have been infected with malware through the Simda ‘botnet’.

Criminals may use this malware to route users' internet traffic to malicious websites and add more malware to infected computers. 

The criminals have sought out computers with unpatched software to infect and add to thebotnet. They could control the botnet themselves, or sell this control to other malicious individuals.

Criminals can also obtain sensitive user information such as online banking access details.

Law enforcement organisations recommend that users keep their antivirus software up-to-date, change their passwords, keep applications and operating systems up-to-date and use anti-malware tools.

Interpol has coordinated an operation to seize and take down the Simda command and control servers in the Netherlands, as well as servers in the United States, Russia, Luxembourg and Poland.

‘Kaspersky Lab has set up a self-check webpage where the public can see if their IP address has been found to be part of a Simda botnet,’ Interpol advised.

If you believe Simda has compromised your computer, you can also scan your environment using Microsoft Safety ScannerMicrosoft Security Essentials or Windows Defender.

More information

How to set automatic updates on your computer.

The information provided here is of a general nature. Everyone's circumstances are different. If you require specific advice you should contact your local technical support provider.


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This information has been prepared by Enex TestLab for the Department of Communications ('the Department'). It was accurate and up to date at the time of publishing.

This information is general information only and is intended for use by private individuals and small to medium sized businesses. If you are concerned about a specific cyber security issue you should seek professional advice.

The Commonwealth, Enex TestLab, and all other persons associated with this advisory accept no liability for any damage, loss or expense incurred as a result of the provision of this information, whether by way of negligence or otherwise.

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Please note that third party views or recommendations included in this information do not reflect the views of the Commonwealth, or indicate its commitment to a particular course of action. The Commonwealth also cannot verify the accuracy of any third party material included in this information.


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