New Mitglieder variants

FSecure posted today that more mitglieder variants have been sent out as spam. Not sure if that is what I’m seeing. Sounds like it though.
At my company I began seeing heuristic detections in our inbound email at 1:30pm eastern and lasted until 4:30pm. There were about 250 virus emails in that time period.
The file is 1.exe. Usually the message I get is about the actual viral code so that file is probably inside another file. There was not a single source IP address for the messages.