- http://securityresponse.symantec.com/avcenter/venc/data/w32.blackmal.e@mm.html BlackWorm is a new and potentially destructive Internet worm currently making its way around the globe. It is infecting users via e-mail and is scheduled to destroy all Microsoft Word, Excel, PowerPoint, PDF, PSD and ZIP files on Feb. 3. W32.Blackmal.E@mm is a mass-mailing worm that attempts to spread through network shares and lower security settings. On the third day of every month it attempts to rewrite files with certain extensions with custom text.