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W32/Badtrans@mm variants 11/26/01 9:20am

Per NAI these worms attempt to send themselves using Microsoft Outlook by replying to unread email messages. They also drop a trojan file.

The worms are detected by the 4167 (or 2167) dats as Badtrans@MM. The trojan is detected as Backdoor-NK.svr with the 4134 dats.

The first variant has one of the following attachment names:

Card.pif
docs.scr
fun.pif
hamster.ZIP.scr
Humor.TXT.pif
images.pif
New_Napster_Site.DOC.scr
news_doc.scr
Me_nude.AVI.pif
Pics.ZIP.scr
README.TXT.pif
s3msong.MP3.pif
searchURL.scr
SETUP.pif
Sorry_about_yesterday.DOC.pif
YOU_are_FAT!.TXT.pif

With the second variant the attachment name is created from three sections. The first part is chosen from the possibilities:

fun
Humor
docs
info
Sorry_about_yesterday
Me_nude
Card
SETUP
stuff
YOU_are_FAT!
HAMSTER
news_doc
New_Napster_Site
README
images
Pics

The second part is chosen from the possibilities:

.DOC.
.MP3.
.ZIP.

and the last part from the possibilities:

pif
scr

Do Not Open The Attachment!

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National Institutes of HealthCenter for Information Technology
National Institutes of Health
Bethesda, Maryland 20892

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