- Feb 4, 2016
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Nayana's payment was the largest ransomware payment ever made and may have involuntarily put a giant bullseye on the backs of all South Korean businesses, now considered more willing to pay outrageous ransom demands to be left alone.
The Armada Collective ransom letters sent last week to South Korean banks said the group would launch DDoS attacks on the targeted banks today, June 26, and double their ransom demand.
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The $1 million ransom payment paid last week by South Korean web hosting company Nayana has sparked new extortion attempts on South Korean companies.
According to local media, seven banks have received emails that asked the organizations to pay ransoms of nearly $315,000 or suffer downtime via DDoS attacks.
Only five of the seven targets are publicly known, which are also the country's biggest financial institutions: KB Kookmin Bank, Shinhan Bank, Woori Bank, KEB Hana Bank, and NH Bank.
Ransom demands made by Armada Collective
The ransom demands were signed by a group of "Armada Collective," a name that has a long history behind it.
The group first appeared in 2015, and they are considered one of the hacker groups that popularized ransom DDoS (RDoS) attacks alongside another group known as DD4BC (DDoS-for-Bitcoin).
While Europol apprehended suspects behind the DD4BC group, the people behind Armada Collective were never caught, and their tactics seem to have evolved across time.