Virgin Media subscribers whose computers are part of a botnet can expect a letter warning them to tighten up their security, under a new initiative based on data collected by independent malware trackers.
The UK's third-largest ISP will match lists of compromised IP addresses collected by the Shadowserver Foundation, among others, to its customer records.
Those with infected machines will be encouraged to download free security software to remove the malware and protect their connection in future. Virgin Media says it expects to send out hundreds of letters per week initially, with plans to expand the campaign based on customer feedback.
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