Avast dont understand FSG exe-packer

Viruses and worms
1

i alredy collected 3 trojan packed by FSG.

Avast dont know how to unpack FSG right ?

2

Genereally, it does, but

  • there are multiple versions of FSG, some rare ones may not be supported
  • if avast! doesn’t contain the signature for the unpacked file in its virus database, it doesn’t matter whether it’s able to unpack it or not - it won’t be able to detect it, of course.
3

Вы видимо понимаете русский потому все лучше опишу на русском языке.

Я проверил тот же фаил с сайтов других антивирусных продуктов, они указали что фаил являеться трояном.

замечу, если распаковать то все эти вирусы аваст видит, а значит сигнатуры этих вирусов есть.

english :
i checked this file on another antivirus software sites.
File infected by trojan.

i unpack infected files and then avast report presence of virus, so virus signature
in avast database exist.

4

i used to unpack FSG
UN-Fsg
http://programmerstools.org/node/207
FSG 1.33 Unpazker
http://programmerstools.org/system/files?file=fsg133unpazker.zip

5

Well, as I said, some versions may be unsupported.
Btw, I suggest to be careful with these unpackers, unless you know precisely what they are doing. Many of them actually run the file they want to unpack and dump the result from memory after unpacking, repairing the image structure. So, if you unpack a piece of malware this way, you actually activate it.

If you wish, you may send me the infected files and I can check why they’re not unpacked.

6

i can`t send you infected file.
ClamAV on our smtp server block it :)))

is the any way to send it to you in differnt way ?

7

The preferable way is to pack the infected file(s) with ZIP or RAR and protect it with a password (e.g. “virus”). This way, the antivirus products on the way shouldn’t be able to delete it.