[Exim] Bugbear/B filtration

Hi,

I normally use exim global-filters to filter out common viruses.

e.g.
if ($message_body CONTAINS "filename=\"LOVE-LETTER-FOR-YOU.TXT.vbs\"" and
$message_body_size is above 5k)
then
       fail text "This message appears to contain the ILOVEYOU virus! (see \
   http://www.fsecure.com/v-descs/love.htm).\n"
endif

Does anyone have a similar filter for the Bugbear/B virus:
http://vil.mcafee.com/dispVirus.asp?virus_k=100358

Hope someone can help, Many thanks.

HJ