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"AutoRun is a really useful tool, but it is also a way to spread more than two-thirds of current malware," said Virus Lab analyst Jan Sirmer. Cyber-criminals are preying on people's natural inclination to share files with family, friends and coworkers via USB-attached memory, which is in handheld consoles, cell phones, digital cameras and portable music players.
Avast says its anti-virus software thwarted 84% of the USB/AutoRun related attacks with an on-access scan, while the remaining 16% were detected full drive scans. However, it was noted that detection rates could fall as storage devices grow in capacity. "A full scan can take up to an hour for a one terabyte device, so people will skip this entirely or just go for a quicker on-access scan." The firm offered a few pointers on keeping safe:
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