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Gigantic 100,000-strong botnet used to hijack traffic meant for Brazilian banks

Ghostdns

Over 100,000 routers have had their DNS settings modified to redirect users to phishing pages. The redirection occurs only when users are trying to access e-banking pages for Brazilian banks.

Around 88% of these routers are located in Brazil, and the campaign has been raging since at least mid-August when security firm Radware first spotted something strange.

But according to a new report published last week by Chinese cyber-security firm Qihoo 360, the group behind these attacks have stepped up their game.

By analyzing massive amounts of collected data, Qihoo 360's Netlab division gained a deep look into the group's modus operandi.

CNET: We can't stop botnet attacks alone, says US government report

According to Netlab experts, the hackers are scanning the Brazilian IP space for routers that use weak or no passwords, accessing the routers' settings, and replacing legitimate DNS settings with the IPs of DNS servers under their control.

This change redirects all DNS queries...(continued)

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