A security researcher who goes by the name Benkow has discovered a spambot with 711 million email addresses at its disposal. Troy Hunt, who runs the website Have I Been Pwned, said it's "the largest single set of data" he's ever loaded into his searchable database of compromised accounts. Prior to its discovery, the largest he's had to upload contained 393 million records. The spambot called "Onliner" is used as a way to deliver the Ursnif banking malware made to infect Windows computers. Worse, it's capable of bypassing spam filters, so someone not paying close attention to the sender's email address could end up infected.