A Paris-based security researcher, who goes by the pseudonymous handle Benkow, discovered an open and accessible web server hosted in the Netherlands, which stores dozens of text files containing a huge batch of email addresses, passwords, and email servers used to send spam. Those credentials are crucial for the spammer’s large-scale malware operation to bypass spam filters by sending email through legitimate email servers.
The spambot, dubbed “Onliner,” is used to deliver the Ursnif banking malware into inboxes all over the world. To date, it’s resulted in more than 100,000 unique infections across the world, Benkow told ZDNet.
http://www.zdnet.com/article/onliner-spambot-largest-ever-malware-campaign-millions/
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