[inbox] Re: [Full-Disclosure] Windows covert channel
Maynard, David C
david.c.maynard at xo.com
Mon Oct 20 17:47:11 BST 2003
I believe you are refering to editing a file and saving with a :hidden
Say you have a file test 4k you can open the that file with lets say
test:hidden and add as much info as you want and the orignial file size
never changes and test:hidden it not listed in file system but is
treated as a seprate file when edited.
You have to know the hidden info is attached to the test file to detect
From: full-disclosure-admin at lists.netsys.com
[mailto:full-disclosure-admin at lists.netsys.com] On Behalf Of Curt Purdy
Sent: Monday, October 20, 2003 9:49 AM
To: 'jazper'; full-disclosure at lists.netsys.com
Subject: RE: [inbox] Re: [Full-Disclosure] Windows covert channel
> You are probably thinking of ADS(Alternate Data Streams).
> > I seem to remember in the dim reaches of my memory a covert
> channel in
> > the Windows file system where you could paste one file at
> the end of
> > another without it being detectible when you edited the
> orginal file.
It may be that he is referring to an exe packer as used to attach a
trojan to a legitimate exe aka whackamole.
Curt Purdy CISSP, GSEC, MCSE+I, CNE, CCDA
Information Security Engineer
If you spend more on coffee than on IT security, you will be hacked.
What's more, you deserve to be hacked.
-- White House cybersecurity adviser Richard Clarke
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