From: Valdis Shkesters (valdis@antivirus.lv)
Date: Mon Dec 12 2005 - 18:42:17 EST
These days, a very popular approach is to pack malicious codes by
different packers to create a large number of pseudo versions. Tests
performed by Eric Johansen from IBM Virus CERT were presented
at the Virus Bulletin 2005 conference. He had packed the generally
known Nimda.a by different packers and tested what was the possibility
of fooling different anti-viruses. Symantec with its on-demand scanner
identified only 33%, McAfee 67%, Trend Micro 57%.
http://files.malwareblog.com/EJohansen_VB2005_Presentation.pdf
http://files.malwareblog.com/EJohansen_VB2005.pdf
Best regards,
Valdis
----- Original Message -----
From: "Jeroen" <jeroen@isvet.nl>
To: <pen-test@securityfocus.com>; <full-disclosure@lists.grok.org.uk>
Sent: Tuesday, December 13, 2005 12:56 AM
Subject: [Full-disclosure] Inside AV engines?
> For penetration testing on Wintel system, I often use netcat.exe and stuff
> like pwdump. More and more I need to disable anti-virus services before
> running the tools to avoid alarms and auto-deletion of the applications.
> It
> works but it isn't an ideal situation since theoretically a network can be
> infected while the AV-services are down. Recompiling tools is an option
> since the source of many tools I use is available. The question is (before
> I
> burn useless CPU cycles): can someone help me getting info about the
> inside
> of AV engines? Will addition of some rubbish to the code do the trick (->
> other checksum), do I need to change some core code or is it a mission
> impossible anyway? Who can help for example getting some useful research
> papers on the subject of detecting viruses and how to bypass mechanisms
> used? Any help will be appreciated.
>
>
> Greets,
>
> Jeroen
>
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> Hosted and sponsored by Secunia - http://secunia.com/
------------------------------------------------------------------------------
Audit your website security with Acunetix Web Vulnerability Scanner:
Hackers are concentrating their efforts on attacking applications on your
website. Up to 75% of cyber attacks are launched on shopping carts, forms,
login pages, dynamic content etc. Firewalls, SSL and locked-down servers are
futile against web application hacking. Check your website for vulnerabilities
to SQL injection, Cross site scripting and other web attacks before hackers do!
Download Trial at:
http://www.securityfocus.com/sponsor/pen-test_050831
-------------------------------------------------------------------------------
This archive was generated by hypermail 2.1.7 : Sat Apr 12 2008 - 10:55:15 EDT