[Esd-l] Badtrans worm signature trap for local-rules.procmail

[John D. Hardin]

Poking through all of the badtrans samples in my quarantine (sheesh!)
I've picked out what may be a rule for detecting it. It doesn't have
any base64 strings (any volunteers?), but the attachment does appear
to have a good signature in the boundary and Content-ID header, which
is consistent across all samples I have.

Comments solicited.



# Trap BadTrans? (signature as of 11/26/2001)
#
:0
* > 40000
* < 50000
* ^Subject:.*Re:
* ^Content-Type:.*multipart/related;
* ^Content-Type:.*multipart/alternative; boundary="====_ABC0987654321DEF_===="
{       
        :0 B hfi
        * ^Content-Type: audio/x-wav;
        * ^Content-ID: <EA4DMGBP9p>
        * ^Content-Transfer-Encoding: base64
        | formail -A "X-Content-Security: [$HOST] NOTIFY" \
                  -A "X-Content-Security: [$HOST] QUARANTINE" \
                  -A "X-Content-Security: [$HOST] REPORT: Trapped
BadTrans worm - see
http://securityresponse.symantec.com/avcenter/venc/data/w32.badtrans.b@mm.html"
}



--
 John Hardin KA7OHZ    ICQ#15735746    http://www.impsec.org/~jhardin/
 jhardin at impsec.org                       pgpk -a jhardin at wolfenet.com
  768: 0x41EA94F5 - A3 0C 5B C2 EF 0D 2C E5  E9 BF C8 33 A7 A9 CE 76 
 1024: 0xB8732E79 - 2D8C 34F4 6411 F507 136C  AF76 D822 E6E6 B873 2E79
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