This one has been massively spammed and is out there, as I'm receiving copies in my in-box now 
Win32.Agent.brk Trojan - Avoid Funny.ZIP attachment
http://www.f-secure.com/weblog/archives/archive-072007.html#00001234
QUOTE: There's a fairly large seeding of Trojan-Downloader.Win32.Agent.brk going on.
Very few AV companies have coverage based on the sample sent to Virus Total:
Complete scanning result of "funny.zip", processed in VirusTotal at
07/25/2007 15:10:16 (CET).
[ file data ]
* name: funny.zip
* size: 19250
* md5.: e370545d893c2e35bf1b41be3bda45fe
* sha1: f456d384504b9f04faf9f552bbb46ed77ceaa2fd
[ scan result ]
AhnLab-V3 2007.7.25.0/20070725 found nothing
AntiVir 7.4.0.44/20070725 found nothing
Authentium 4.93.8/20070725 found nothing
Avast 4.7.997.0/20070725 found nothing
AVG 7.5.0.476/20070725 found nothing
BitDefender 7.2/20070725 found [Trojan.Downloader.Agent.YJF]
CAT-QuickHeal 9.00/20070724 found nothing
ClamAV 0.91/20070725 found [Trojan.Downloader-11827]
DrWeb 4.33/20070725 found [Trojan.MulDrop.7173]
eSafe 7.0.15.0/20070724 found nothing
eTrust-Vet 31.1.5004/20070725 found nothing
Ewido 4.0/20070725 found nothing
F-Prot 4.3.2.48/20070725 found [W32/Downldr2.ANWJ]
F-Secure 6.70.13030.0/20070725 found
[Trojan-Downloader.Win32.Agent.brk]
FileAdvisor 1/20070725 found nothing
Fortinet 2.91.0.0/20070725 found nothing
Ikarus T3.1.1.8/20070725 found [Trojan-Downloader.Win32.Agent.brk]
Kaspersky 4.0.2.24/20070725 found [Trojan-Downloader.Win32.Agent.brk]
McAfee 5081/20070724 found nothing
Microsoft 1.2704/20070725 found nothing
NOD32v2 2418/20070725 found [Win32/TrojanDownloader.Agent.NPW]
Norman 5.80.02/20070725 found nothing
Panda 9.0.0.4/20070724 found nothing
Sophos 4.19.0/20070717 found nothing
Sunbelt 2.2.907.0/20070725 found nothing
Symantec 10/20070725 found [Trojan.Pandex]
TheHacker 6.1.7.152/20070723 found nothing
VBA32 3.12.2.1/20070724 found nothing
VirusBuster 4.3.26:9/20070724 found nothing
Webwasher-Gateway 6.0.1/20070725 found nothing