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ISTSVC Trojan?

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Original Message
Name: LauraS
Date: June 14, 2004 at 14:50:41 Pacific
Subject: ISTSVC Trojan?
OS: Windows XP Professional
CPU/Ram: Pentium II
Comment:

Hi, I was wondering is Istsvc.exe a trojan? I was on aol.com when I think it was Norton Internet Security informed me that istsvc.exe was trying to access the internet. I blocked it from accessing for I didn't know what it was and then I did a web search for istsvc and arrived at this site. I notice another post saying they had this trojan worm/virus? and was having a hard time removing it.

So, assuming it is a threat, I tried to follow the instructions that were given to them which was download spybot do a search and then let it search and destroy. The only problem is, it didn't detect it. It seems to have detected alot of spyware on my computer but not istsvc. I know it's there because I did a Windows search and found 1 folder and 2 seperate files.

Also, My Norton Security is always at least 10 times a day blocking a trojan from my computer - is this normal to be getting so many computers trying to access my computer with a trojan horse?

I've tried to manually delete istsvc files and access denied.

Thanks in advance for anyones help.

Laura S


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Response Number 1
Name: Thresher
Date: June 14, 2004 at 19:44:51 Pacific
Subject: ISTSVC Trojan?
Reply: (edit)

Do this first:

Disabling system restore in Win Xp
http://service1.symantec.com/SUPPORT/tsgeninfo.nsf/docid/2001012513122239?Open&src=sec_doc_nam&docid=2001111912274039&nsf=tsgeninfo.nsf&view=docid&dtype=&prod=&ver=&osv=&osv_lvl

Do not re-enable until you are 100% clean.

Do a general clean up:

Dunmp TIF, Cookies, %TEMP%, recycle bin,

Scan disk disk clean-up

then these, do both:

Trojan Hunter trial version:

http://www.misec.net/

SWATIT:

http://swatit.org/download.html

Then scan:

http://housecall.trendmicro.com/

security.symantec.com/ (security.symantec.com)

www.ravantivirus.com/scan/ www.ravantivirus.com/scan)

http://www.bitdefender.com/scan/licence.php

http://www.pandasoftware.es/actives...ivescan-com.asp

they're all free, do as many as you can, I'd do them all.

Your Norton NIS isn't keeping the trash out, I use this:

http://smb.sygate.com/products/spf_standard.htm


Download, update and run (I use) these:

http://www.javacoolsoftware.com/mrublaster.html

http://www.javacoolsoftware.com/spywareblaster.html


My settings for Adaware and Spybot:

Spybot:

update and run every 3 days or LESS

Download and Read the SpyBot tutorial here:

http://www.safer-networking.org/


Download it, Unzip the program, and immediately check for updates, install the updates and then do the scan.

Let it fix everything marked in red. Reboot but not with restart, shut it down for two full minutes. You’ve got two measely minutes and it’s worth it, and let Spybot run if it indicates.

To add an item to your ‘Ignore List” click on the little ‘+’ sign next to the item and left click it to highlight it, then right click it and a menu appears, select the function you want.

When you are done reboot again same way. Two full minutes shut sown is best.


Also, go to the update page. Notice 3 icons across the top. Between "Search For Updates" and "Download Updates" there is an icon for the download mirror location. After you click on ‘search for updates,’ the one in the middle will change. If it doesn't say "Spybot.US by Rootboxen.net USA" click on the dropbox arrows and click on Rootboxen, and use only that one. If you got a "checksum error" trying to download --that's why.


Adaware:

update and run every three days or LESS

http://www.lavasoft.de/support/download/

check for updates at "webupdate".

I use these settings (green check)

From main window click "Start" then make sure " Activate in-depth scan" has a green check next to it.

Put a black dot nest to "Use custom scanning options” and click Customize" next to it, then green check these options:
"Scan within archives" ,"Scan active processes", "Scan registry",
"Deep scan registry" ,"Scan my IE Favorites for banned URL"
"Scan my host-files"

At the top of the “STATUS” page notice the Tweak (gear) icon. Click on it.

The first setting is “Scanning Engine.” Click on the little plus sign next to it, and in the drop-down green check "Unload recognized processes during scanning", and “include basic Ad-Aware settings in log file”. Next click on the ‘+’ next to "Cleaning Engine" and in the drop-down green check "Let windows remove files in use at next reboot" and Delete quarantine objects after restoring”

Click "proceed", that will save those settings.

Click "Scan"

When the scan finishes, mark everything for removal and delete it. Right-click the window and choose "select all" from the drop down menu, press ‘next’ and then ‘yes’ to the prompt: “remove all these entries”.

However, if you have certain programs running that will give a false indicator of a browser hijack attempt, such as Script Sentry, which places a monitoring function in the registry and looks like a browser hijacker but is not, then you may want to add that to the ignore list because you want to keep it there to do it’s job. To add an item to the ignore list, put the a cursor on the file it reveals and left click it to highlight it, then right click it and a menu appears. Click on ‘ignore list.’

Shut down, two minute shut down is best, and let Adaware run on reboot if it indicates.


Downloading Tip:

One other thing I do on downloading is, after you get the download (M$ does not structure its downloads so you can’t do this for some reason on an MS download), after download BEFORE YOU CLICK THE INSTALL ICON, #1. log off the net, #2. disable AV (right click tray icon), #3. then ctrl-alt-delete to close AV in close-program, THEN (and only then) #4. click on the install procedure. Otherwise your AV might read the install as an invader and mess with it. Then manually shut down for two full minutes.

Run Adaware, Spybot, and your AV from Safe Mode.

If they all come clean, re-enable system restore.

Defragment your disk, make sure all systems are updated, even if you do not use Outlook, update it if you have it installed-- its settings will affect IE.

Thresher



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Response Number 2
Name: Thresher
Date: June 14, 2004 at 20:06:38 Pacific
Subject: ISTSVC Trojan?
Reply: (edit)

Did you read this? if not read and do...


http://sarc.com/avcenter/venc/data/adware.istbar.html


As far as whether it is normal for your NIS to be blocking that many trojans etc per day...if they're coming for you, and it is doing it's job...yes. It's normal.

The question is, why did it not catch this one? Go here:

http://www.grc.com/default.htm

and do ShieldsUp, LeakTest, and DCOMbobulator, and UnplugNPray, and see if your ports are stealthy. If not then you need that Sygate firewall because NIS isn't doing the job. No surprise there.

Thresher


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Response Number 3
Name: LauraS
Date: June 14, 2004 at 23:09:16 Pacific
Subject: ISTSVC Trojan?
Reply: (edit)

Thank you so much Thresher.

I will do as you suggested tomorrow.

Laura

Laura S


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