The RIG exploit kit moved from distributing Tofsee to other payloads, possibly because distributing them was more attractive to cybercriminals from a monetization standpoint or simply because different actors began using this exploit kit as a distribution mechanism for their malware.Given the volume of spam messages that infected hosts attempt to distribute, new nodes are quickly added to DNS-based Blackhole Lists (DNSBL) and most of the major email service providers will not accept new message transmissions once this occurs.In order to keep spam levels consistent new nodes must be added constantly.When RIG stopped distributing Tofsee payloads, those responsible for Tofsee switched to alternative distribution methods.To meet the man who hasn’t showered in 12 YEARS – click HERE.
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While the Tofsee botnet has been known for sending spam messages, the messages have historically contained links to adult dating and pharmaceutical websites.
Starting in August, Talos began to observe a change in the nature of the spam messages being sent by this botnet.
I mean one day I can deal with, two days is pushing it, but three days?
You’ve pretty much given up on trying to be a normal human being if you don’t shower for three days.
Each email contains slightly different text, however the same format is used across all of the messages Talos analyzed.