Ethical Hacking

Learn to find vulnerabilities before the bad guys do! Gain real world hands on hacking experience in our state of the art hacking lab. Course designed and taught by expert instructors with years of penetration testing experience. 12 student maximum in every class. Certification attempt included in every package.
Computer Forensics Training at InfoSec Institute

Gain the in-demand skills of a certified computer examiner, learn to recover trace data left behind by fraud, theft, and cybercrime perpetrators. Discover the source of computer crime and abuse at your organization so that it never happens again. All of our class sizes are guaranteed to be 12 students or less to facilitate one-on-one interaction with one of our expert instructors.




Network Security Security-Basics
[Top] [All Lists]

Re: Computer forensics to uncover illegal internet use

Subject: Re: Computer forensics to uncover illegal internet use
Date: Tue, 30 Aug 2005 14:41:19 +0000
Edmond Chow [echow@gettechnologies.com] writes:

I have been tasked with finding out if a certain desktop computer was used
to view pornographic sites on the internet.  This user has gone to great
lengths to try to mask his illegal activities by erasing cookies,

So examine the deleted filespace too.  Sure, the blocks used by the cookies and 
other temp files may have been overwritten by now, but probably not.  I doubt 
he would have gone to the trouble to ensure that by hand.

Sorry, I am not personally familiar with the latest tools to do that.  Mount 
the drive as a second HD (NOT THE FIRST ONE, you don't want to run anything on 
it, don't even swap to it) under Linux, and it should be easy to look at it 
exactly bit by bit, and thereby search the deleted space for things like 
cookies, jpgs, etc.

Also, at a network level, we know his IP address but yet my technical
support department is telling me that they cannot (either because they
don't want to or because they are not technically capable of) tell me
what internet sites this IP address has accessed in the past.
Logically, there must be a point in the network (on some piece of
hardware) where I can consult log files to track his activities?  Or,
is there a log file that I can consult that will tell me what sites
all my users have accessed and from what IP address?

It all depends on what tools your network uses, how they are arranged, how 
verbose the logs are, how soon they are purged, etc.  It is very possible that 
there is no such log, but any company would be well-served to at least log what 
URLs are accessed from which IPs, "for, uh, just such an emergency".


-Dave




<Prev in Thread] Current Thread [Next in Thread>