Spam output fell “dramatically and almost instantaneously” after the Rustock Botnet was dismantled in mid March. MessageLabs says it remains to be seen whether those behind Rustock will be able to recover from the coordinated effort against what has become one of the most technically sophisticated botnets in recent years. Since March 26th the amount of data traffic hitting spam traps has increased despite a decline in the number of spam emails, the company says. Malware sent via email increased by 400 percent in the last week of March, Commtouch reports.”]
Source: https://www.csoonline.com/article/2128363/spam-perseveres–despite-rustock-takedown.html