Can Avast handle these packers: 7z, ZIP, RAR, CAB, ARJ, LZH, GZIP, BZIP2, Z, CHM, TAR, CPIO, RPM and DEB or can it not? Just curious.
Hello,
A forum is a place where you ask questions to which you did not find the answer while searching. Specily in this case case where the answer happens to be in the first few lines of the product description :o
Al968
avast has some of the best support for packers of any AV it supports most of the common packers, don’t know about these, CPIO, RPM and DEB.
I though CHM was a help file, I find that is Compiled HTML, which many help files use to display, so I don’t know if that would come under the category of packers in the same way as mht keeps al data and images together in one archived html file.
http://computing-dictionary.tfd.com/Compiled%20HTML
Thank you for your input. Should I add support for CPIO, RPM and DEB to the wishlist? I was just curious.
First we need to identify if they are supported just that I another avast user don’t know if they are supported.
Here are the (un)packers supported by avast!; the bold ones are supported in the boot-time scanner as well:
7-ZIP
ACE
ARC
ARJ
BZIP
CAB
CPIO
DBX (Outlook Express DB)
DosExec (multiple)
GZIP
CHM
Installer (multiple)
ISO
LHARC
MAPI (Outlook DB)
MIME
OLE
RAR
RPM
SIS
NTFS Streams
TAR
TNEF Streams
WinExec (many)
ZIP
ZOO
Maybe someone else at the last built, I’m not sure…
I suppose DEB is from Debian (Linux package)… not sure it’s supported on Windows.
Sorry to but-in on the topic but when I did a standard scan on my computer I noticed it said that a lot of my Steam game files were registered as corrupt but is that due to Avast not supporting Bzip2 archivers and thats why it thinks they are corrupt?
If anyone who has these games can verify this for me I would be greatful
Most probably. Missing unpackers are the reason for avast to shown the files as being ‘corrupt’.
Does anyone here or from the Avast team know if they will be implementing these missing unpackers in future updates, as it would remove these worrying listings at the end of scans, thanks
BZIP2 format is supported; so, if avast! reports corrupted BZIP archives, I’d say either they really are corrupted, or they are some custom modifications of BZIP format. But of course, I can’t say anything for 100% sure without seeing the real files.
Regarding the other formats… well, CPIO and RPM support may not be complete, and DEB is not present. If they’ll be added, however, I don’t know; I’d leave this for our Linux guys (to say what importance they think this should have).
Well, debian files are one of the most common setup files for Linux…
I’m not saying they aren’t - but I think the question is: how much malware can you expect in that format?
(which I have no idea)
Neither do I. Maybe Dublin can drop a word here…
Does anyone who uses Valve games have these results or are mine really corrupt?
erm , Steam container GameCacheFile .gcf isn’t definitely normal bzip2
GCF format ‘documentation/info’ http://www.wunderboy.org/docs/gcfformat.php
to view use e.g. GCFscape http://nemesis.thewavelength.net/index.php?p=25
http://developer.valvesoftware.com/wiki/Gcf
So because they are not normal BZIP2 file archive types that is why they are being labelled corrupt when in fact they its just because they are not strictly exact BZIP2 types, am I correct?
no, they not similar to bzip2 type of archive at all … it’s Valve custom file container
one of reasons why it shows as corrupt is that when You run Steam and it updates or You play game
the file stays then locked for other process
quit Steam and Steam games (wait till it dissapper from active memory) then retry
If they are reported as corrupted BZIP archives, there has to be a BZIP header at least (otherwise avast! wouldn’t detect them at all - so it wouldn’t call them corrupt).
It’s hard to say much more without checking the particular files…
The files have an extension .gcf which are map files, I read somewhere that they are overwritten when in use almost as if they are placeholders until they are in use then they become inactive again, I think thats what I read anyway but if Avast team can try and determine what packers Steam uses then maybe in future you could cover it.
sanctuary did u read these links i posted? all informations about GCF u need to know are there …
btw. .gcf aren’t map files and theirs header isn’t similar to bzip2
http://en.wikipedia.org/wiki/Bzip2#File_format
p.s.
interesting that Avast! is able read content of one .gfc i got “lostcoast content.gcf” (via ashsimpl) but on rest files ignores and skip as single file (no errors at any)