I detected it with kaspersky online scaner, and also find a copy of it in the bak folder.
Btw I got this results after scanning ComboFix

AhnLab-V3 2007.4.7.0 04.06.2007 no virus found
AntiVir 7.3.1.48 04.08.2007 no virus found
Authentium 4.93.8 04.06.2007 no virus found
Avast 4.7.936.0 04.08.2007 no virus found
AVG 7.5.0.447 04.08.2007 no virus found
BitDefender 7.2 04.08.2007 no virus found
CAT-QuickHeal 9.00 04.06.2007 no virus found
ClamAV devel-20070312 04.08.2007 no virus found
DrWeb 4.33 04.08.2007 no virus found
eSafe 7.0.15.0 04.08.2007 suspicious Trojan/Worm
eTrust-Vet 30.7.3549 04.06.2007 no virus found
Ewido 4.0 04.08.2007 no virus found
FileAdvisor 1 04.08.2007 no virus found
Fortinet 2.85.0.0 04.08.2007 no virus found
F-Prot 4.3.1.45 04.04.2007 no virus found
F-Secure 6.70.13030.0 04.08.2007 no virus found
Ikarus T3.1.1.3 04.08.2007 Trojan-Dropper.Win32.Delf.FZ
Kaspersky 4.0.2.24 04.08.2007 no virus found
McAfee 5003 04.06.2007 no virus found
Microsoft 1.2405 04.08.2007 no virus found
NOD32v2 2173 04.07.2007 no virus found
Norman 5.80.02 04.05.2007 no virus found
Panda 9.0.0.4 04.08.2007 Suspicious file
Prevx1 V2 04.08.2007 no virus found
Sophos 4.16.0 04.06.2007 no virus found
Sunbelt 2.2.907.0 04.07.2007 no virus found
Symantec 10 04.08.2007 no virus found
TheHacker 6.1.6.085 04.04.2007 no virus found
VBA32 3.11.3 04.07.2007 no virus found
VirusBuster 4.3.7:9 04.07.2007 no virus found
Webwasher-Gateway 6.0.1 04.08.2007 Win32.ModifiedUPX.gen!84 (suspicious)