In week 51 the variation in spam mails increased rapidly. This led to a tripled amount of distinct hash sums of spam mails identified by the NiX Spam Project.
|The blue lines shows the number of distinct hash sums of spam mails.|
But this trend was already obsoleted by another trick used today.
Half the day spammers tried to burst spams in very short time slots but with high volume from countless IPs. On the graphs below you can see that the bursts last only few minutes followed by quiet minutes. This behavior was repeated over more than ten hours.
|Attempts per second to deliver spam to spam traps.|
|Hit rate of IPs queried at the NiX Spam DNSBL|