Kernel hiding files

L

Lyndon Eaton

I have started to install SP4 onto Windows 2000 Server and
half way through the installation it says ipsec.sys can
not be found and asks me to browse for the file. I then
copied the ipsec.sys file from another machine onto a
floppy disk so that I could browse to the floppy and then
the installation would continue. When I inserted the disk
into the server, ipsec.sys is invisible.

I thought this was very strange so I started to
investigate/play. I checked that my system files and
hidden files are visble in explorer, and that I was not
hiding extentions of known file types. With these settings
being correct I created a new file called hello.txt, and
then renamed it to ipsec.sys, the file then disapeared! If
I try to do the same a second time, I get an error saying
a file with this name alread exists. All files seem to
disapear when given a filename mask of ipsec.*

I then mapped a drive to the server, and could see the
ipsec.* files I had been renaming from the remote machine.
So the files are there, they are just invisible.

Having looked on the internet, I found two programs that
can hide and lock files on a system. Both of these
programs run at kernel level. These programs are:

File & Folder Protector http://www.softheap.com/ffp.html
File Protect http://www.mikkotech.com/fp2000.html

I have installed both of these programs onto a
workstation, however their lists of 'files to
hide/protect' are independant. I would hope that both
programs would save their lists in the same location so
that I could install one of these programs onto the
server, see a list that displayed ipsec.* is being hidden
and reverse.

I suspect that our server has been hacked, and a program
similar to the above two have been installed, and set the
kernel to hide all ipsec.* files.

This brings me to my two questions.

1) If my suspition is correct, and something has been set
in the kernel to hide ipsec.* files (and possibly others),
how can I restore the kernel? Or remove
these 'protect/hide' permissions.

2) My server is currently half way through the SP4
install, waiting for ipsec.sys. If I cancel the install at
this stage, will my server stop functioning? How do I roll
back the half install so that things carried on working
how they were?

Many thanks.
Lyndon Eaton.
 
L

Lyndon Eaton

Yes it seems like that is what we have, a kernal mode
trojan, or rootkit.

Looks like it is going to be difficult to find and remove.
Any ideas?
 
J

Jack Seredyniecki

The only thing I can recommend is backing up the system and trashing it,
then reinstalling Windows and doing a selective restore of the files you
need from the backup.
 

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