New Trojan Filtering Packets To Isolate Users - InformationWeek

InformationWeek is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

IoT
IoT
News

New Trojan Filtering Packets To Isolate Users

A new Trojan is using a sophisticated technique to cut off infected computers from anti-virus and security vendors' update sites, the Finnish firm F-Secure says.

A new Trojan is using a sophisticated technique to cut off infected computers from anti-virus and security vendors' update sites, the Finnish firm F-Secure said Thursday.

It's not uncommon for worms and Trojan horses to sever links to update sites, but the until recently, said F-Secure, the method has been different: modifying the Windows HOSTS file to redirect the domains of popular security vendors to the local host so that the browser returns a blank page or error.

This Trojan, dubbed Fantibag.b by F-Secure (and Fantibag.a by Computer Associates), however, blocks access by creating packet filtering policies using the Microsoft RAS packet filtering API. The result: all inbound and outbound packets between the user's machine and any of the 100+ filtered IP addresses are then dropped, essentially cutting communication and preventing updates -- such as new malware signatures -- from being downloaded.

Among the filtered IP addresses are those belonging to Microsoft (including Windows Update), Computer Associates, F-Secure, McAfee, Sophos, Symantec, and Trend Micro.

Fantibag.b sports a tenuous connection with the more prevalent Mitglieder Trojan, said Computer Associates; the former may be downloaded to systems already compromised by Mitglieder.

We welcome your comments on this topic on our social media channels, or [contact us directly] with questions about the site.
Comment  | 
Print  | 
More Insights
The State of IT & Cybersecurity Operations 2020
The State of IT & Cybersecurity Operations 2020
Download this report from InformationWeek, in partnership with Dark Reading, to learn more about how today's IT operations teams work with cybersecurity operations, what technologies they are using, and how they communicate and share responsibility--or create risk by failing to do so. Get it now!
Commentary
The Best Way to Get Started with Data Analytics
John Edwards, Technology Journalist & Author,  7/8/2020
Slideshows
10 Cyberattacks on the Rise During the Pandemic
Cynthia Harvey, Freelance Journalist, InformationWeek,  6/24/2020
News
IT Trade Shows Go Virtual: Your 2020 List of Events
Jessica Davis, Senior Editor, Enterprise Apps,  5/29/2020
Register for InformationWeek Newsletters
Video
Current Issue
Key to Cloud Success: The Right Management
This IT Trend highlights some of the steps IT teams can take to keep their cloud environments running in a safe, efficient manner.
White Papers
Slideshows
Twitter Feed
Sponsored Live Streaming Video
Everything You've Been Told About Mobility Is Wrong
Attend this video symposium with Sean Wisdom, Global Director of Mobility Solutions, and learn about how you can harness powerful new products to mobilize your business potential.
Sponsored Video
Flash Poll