A more comprehensive and devious approach

Saturday, April 22nd, 2017

An enterprising group of hackers targeted a Brazilian bank with a more comprehensive and devious approach than usual:

At 1 pm on October 22 of last year, the researchers say, hackers changed the Domain Name System registrations of all 36 of the bank’s online properties, commandeering the bank’s desktop and mobile website domains to take users to phishing sites. In practice, that meant the hackers could steal login credentials at sites hosted at the bank’s legitimate web addresses. Kaspersky researchers believe the hackers may have even simultaneously redirected all transactions at ATMs or point-of-sale systems to their own servers, collecting the credit card details of anyone who used their card that Saturday afternoon.

“Absolutely all of the bank’s online operations were under the attackers’ control for five to six hours,” says Dmitry Bestuzhev, one of the Kaspersky researchers who analyzed the attack in real time after seeing malware infecting customers from what appeared to be the bank’s fully valid domain. From the hackers’ point of view, as Bestuzhev puts it, the DNS attack meant that “you become the bank. Everything belongs to you now.”


  1. Crosbie says:

    This kind of attack is exactly why HTTPS exists. So the headline story here is the bit where it says ‘Kaspersky found that the certificates had been issued six months earlier by Let’s Encrypt, the non-profit certificate authority that’s made obtaining an HTTPS certificate easier in the hopes of increasing HTTPS adoption.’

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