Can I spam from here: An Unusually Clever Spambot Tests Blacklists

Unit 42 researchers recently observed an unusually clever spambot’s attempts to increase delivery efficacy by abusing reputation blacklist service APIs. Rather than sending spam as soon as the host is infected, the bot checks common blacklists to confirm its e-mails will actually be delivered, and if not, shuts itself down. This spambot, commonly downloaded by