mailing list archives
Setiri + Invisible browsers != visible browsers
From: Haroon Meer <haroon () sensepost com>
Date: Sat, 27 Nov 2004 12:19:25 +0200
About 2 years ago, we demo'd Setiri, a win32 trojan that tunneled data
off networks through the use of Invisible Internet Explorer instances.
This allowed us to avoid sticky issues like authentication / etc and
worked nicely against personal firewalls configured to allow out IE traffic.
Despite the noise it generated back then, very little has been done to
combat the problem. So we threw together a few lines of C# and tacked on
a gratuitous .pdf (for good measure) for an angle we believe can go a
long way towards mitigating the threat..
In short : an invisible browser is not the same as a visible one, and
personal firewalls (that do outbound application control) should not
treat them the same. Application-level access control systems should be
able to detect whether an application is running visible or not.
The short paper : http://www.sensepost.com/garage_portal.html /
The badly written C# : http://www.sensepost.com/garage_portal.html /
As usual, please mail questions/comments/flames to
research () sensepost com / haroon () sensepost com
Haroon Meer MH
SensePost Information Security +27 83786 6637
PGP : http://www.sensepost.com/pgp/haroon.txt haroon () sensepost com
Full-Disclosure - We believe in it.
- Setiri + Invisible browsers != visible browsers Haroon Meer (Nov 27)