During every quarter last year, between 10% and 16% of organizations had DNS traffic originating on their networks towards command-and-control (C2) servers associated with known botnets and various other malware threats, according to a report from cloud and content delivery network provider Akamai.
More than a quarter of that traffic went to servers belonging to initial access brokers, attackers who sell access into corporate networks to other cybercriminals, the report stated. “As we analyzed malicious DNS traffic of both enterprise and home users, we were able to spot several outbreaks and campaigns in the process, such as the spread of FluBot, an Android-based malware moving from country to country around the world, as well as the prevalence of various cybercriminal groups aimed at enterprises,” Akamai said. “Perhaps the best example is the significant presence of C2 traffic related to initial access brokers (IABs) that breach corporate networks and monetize access by peddling it to others, such as ransomware as a service (RaaS) groups.”
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