Re: Hard Drive keeps filling up

[Eric Brown <ericbrow () ziplip com>]

Harris,

One thing I didn't notice you mentioning was shutting down unnecessairy services in XP, such as Remote Desktop, Remote 
Registry, and Messenger.  

While there may be some that disagree with me, I have not had luck with McAffee's virus scanner.  I had a client with a 
computer that was restarting each night, sometimes 2 or three times a night.  We replaced nearly every single piece of 
hardware that would cause the problem before we looked at alternate possibilities.  They were running the latest 
version of McAffee, and had a scan every evening.  But they were infected with several trojans, and were even running a 
few irc bots.

Try using another method of scanning for the virus, like a free on-line virus scan.  You're infected with something.  
More knowledgeable ones on the list can probably tell you what.

I kind of think the 3 firewalls might be a little overkill also.  Just more to mess with.  While there are many that 
swear by one firewall or another, Zone Alarm is easy to use.  I've heard many say it doesn't work, but I've not seen 
evidence to back it up.  I will say that Zone Alarm has been known to "break" and stop working, allowing either all 
internet traffic or none at all.

That's my two cents anyway.
Eric

> -----Original Message-----
> From: Harris Samuel W PORT [mailto:HarrisSW () mail ports navy mil]
> Sent: Tuesday, September 23, 2003, 3:48 AM
> To: security-basics () securityfocus com
> Subject: Hard Drive keeps filling up
>
>       I have been having a problem for a week now and can't seem to detect
> the culprit. This is on my home network. On my wife's machine, the OS is
> Windows XP, 2.8G, Broadband connected, with 802.11g Linksys wireless router.
> I have 3 firewalls running on it, zonelabs, tiny and the firewall included
> with XP. I have an online subscription to McAfee virus software, and it is
> kept up to date as new updates are issued. I have checked Task Manager and
> shut down the processes that I knew wouldn't cause me a problem, the rest
> seem innocent enough, (to my knowledge). I've done netstat several times
> and haven't discovered any obvious unknown connections. I have even locked
> the firewall down (Zonelabs) on several occasions, to eliminate the possibly
> that it was being accessed by an unknown process or program. I have Ad-Aware
> and     Spy-Bot on the computer. I have all the updates to XP installed. I
> have used the Shavlik software  and have updated everything it comes up
> with, I have used the Microsoft Security Analyzer to check for any security
> problems and have installed all that was called for. 
>       Now for the problem. 2 weeks ago my daughter called me up and was
> frantic, because she had been instant messaging and some putz came on and
> told her to invite him in or she would be sorry. She didn't and she was. He
> infected her with some worm that proceeded to fill up her hard drive. I had
> given her an old computer that I had and it only had a 12G hard drive. I
> used VNC to check her computer out and tried to stop the bleeding, but it
> was too much for me. Well, a few days later I get a message that my computer
> is almost out of space. I have an 80G hard drive. I looked at the file
> system but couldn't find the files that were big enough to fill it up like
> that. I was performing a scan with McAfee (which detected nothing by the
> way) and noticed that the computer was spending an inordinate amount of time
> on a .tmp file. I looked at the folder that was in question, and bingo I
> found all the used space. There were several files in the folder that all
> ended in .tmp. One I remember was McV90.tmp. There were others, but that is
> the one I remember. It was 48G all by itself. I tried to open it to view it,
> but couldn't find a program that I had that could open it up. I deleted the
> file and regained my space back. A couple of days later the space was being
> eaten up again. I deleted it again and began monitoring it every few hours
> to see if there was any more action. I couldn't detect much for a few hours,
> then it started up again. 
>       I shut the firewall, so if it was external to the computer, then I
> would stop any outgoing action. The firewall came up with a few complaints,
> but nothing out of the ordinary (I think it wasn't out of the ordinary) This
> didn't seem to stop the process, so I am assuming the problem is in the
> computer. I have a Windows 2000,  Redhat, 9.0, Redhat 8.0 on the rest of my
> network. No problems with any of them. I have googled, I have McAfee'd, I
> have done a few other search engines, but I come up empty as to what this
> is. Spybot and Ad-Aware found nothing, as I run them daily. Any ideas where
> to go next? I am fresh out of ideas at the moment
>       
> Sam
>
>
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