TR/Drop.Zlob.FK.1 Not detected by Avast

Avast Free Antivirus / Premium Security
1

How come Avast does not detect anything but some of the others do?

I was scanning the eCodec-v4.403.exe which is for playing video. Some of the thing found were Trojan-Downloader.Win32.Zlob.IG , Trojan-Downloader.Win32.Zlob.iv and TR/Drop.Zlob.FK.1

http://www.emcodec.com/?id=403

Does this mean Avast needs to be updated?

This is a report processed by VirusTotal on 03/20/2006 at 04:59:16 (CET) after scanning the file “eCodec-v4.403.exe” file.
Antivirus Version Update Result
AntiVir 6.34.0.53 03.19.2006 TR/Drop.Zlob.FK.1
Avast 4.6.695.0 03.17.2006 no virus found
AVG 718 03.17.2006 no virus found
Avira 6.34.0.53 03.19.2006 TR/Drop.Zlob.FK.1
BitDefender 7.2 03.20.2006 no virus found
CAT-QuickHeal 8.00 03.18.2006 no virus found
ClamAV devel-20060126 03.19.2006 no virus found
DrWeb 4.33 03.19.2006 Trojan.StartPage.1266
eTrust-InoculateIT 23.71.106 03.19.2006 no virus found
eTrust-Vet 12.4.2123 03.17.2006 no virus found
Ewido 3.5 03.19.2006 no virus found
Fortinet 2.71.0.0 03.19.2006 suspicious
F-Prot 3.16c 03.19.2006 no virus found
Ikarus 0.2.59.0 03.17.2006 Trojan-Downloader.Win32.Zlob.IG
Kaspersky 4.0.2.24 03.20.2006 Trojan-Downloader.Win32.Zlob.iv
McAfee 4721 03.17.2006 no virus found
NOD32v2 1.1450 03.18.2006 no virus found
Norman 5.70.10 03.17.2006 no virus found
Panda 9.0.0.4 03.19.2006 Suspicious file
Sophos 4.03.0 03.19.2006 no virus found
Symantec 8.0 03.20.2006 no virus found
TheHacker 5.9.6.116 03.20.2006 no virus found
UNA 1.83 03.16.2006 no virus found
VBA32 3.10.5 03.19.2006 no virus found

2

The same reason that others don’t, avast is an anti-virus program and trojans may not fall into its detections and no one anti-virus will detect every virus, trojan, adware, spyware, malware, etc.

The one that surprises me more is that Ewido didn’t detect it and that is a specialist trojan hunter. There are also a number of AVs with detections thought to be very good also missed it, Nod32, BitDefender, etc. 17 anti-virus programs didn’t find anything two though it suspicious and only 4 detected it by signature.

If you are not getting a virus warning that you believe is a new, undetected virus, then if you can zip and password protect (‘virus’, will do) the suspect file and send it to virus @ avast.com (no spaces), or send from the chest.

Give a brief outline of the problem (possibly a link to this thread), the fact that you believe it to be a either a new, undetected virus and include the password in the body of the email. Some info on the avast version and VPS number (see about avast {right click avast icon}) will also help.