Mydoom.M worm creates encrypted log files and sometimes sends
them out instead of its own code due to a bug.
As a result, the encryped data files are sent in a ZIP archive inside e-mails. The
files have random (encrypted) content, they are about 1.1 or 1.2
kilobytes long. F-Secure Anti-Virus detects them as
"I-Worm.Mydoom.m.log". Please delete messages and files that are
detected as such by F-Secure Anti-Virus.