Mimail is a family of simple mass-mailing worms which send various messages with infected EXE or ZIP attachments.
Some of the variants contain payloads such as stealing credit card information or Distributed Denial-of-Service attack against certain website.
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.
Detailed descriptions of Mimail variants are available in separate documents: