Two new viruses have been discovered to infiltrate systems through removable drives.

USB flash drives have become indispensable to almost everyone who uses a computer. It’s a quick and easy way to immediately transfer and share information and other data, especially files that are too large to send through email. Unfortunately, some malware take advantage of this convenience by attaching themselves to files on the drive to infect any other system it comes into contact with.

Two such malware have recently been discovered. Chymine is a Trojan application with keylogging capabilities, designed to copy passwords and other sensitive data, and Dulkis-A is a Visual Basic worm designed to copy and allow malware to infiltrate the system. Both exploit a vulnerability in Windows Shell.

Microsoft has yet to directly address the issue and provide a patch that fixes the problem. In the meantime, they have issued directions for a workaround that prevents both malware from manipulating the Windows Shell susceptibility. The workaround is effective for Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows Server R2, but it comes with a cost – you lose all your icon graphics.

Success in removing the virus has been marginal at best, with current fixes including a warning that removing these malware might result in unwanted changes to your system because of the way the virus embeds itself.

The best way to avoid being infected, be careful not to run any suspicious programs and files, especially when taken from USB drives and any other removable storage, even from a Blackberry or an iPhone. It’s also best to avoid automatically enabling USB devices to autorun once they’re plugged into your computer.

If you have any concerns or want to make sure your systems are protected, give us a call and we’ll work with you to ensure the security of your systems and data.