What the Tech?! Free tech support Archive
This is a read-only archive. No new posts or registrations. Privacy Page
Spyware / Malware / Virus Removal

MCVSSKT.DLL 104 KB Malware

7 min read

This thread's last reply is from . Advice, software, and links below may be out of date — treat specific steps and download links with caution.

Looking for the outcome? Ask AI

Post #1
My computer was slow for most of the last week, I have McAfee, Ewido and Prevx1 installed and only Prevx1 picked up the MCVSSKT.DLL to be the problem. I've done some research and found out this Dll belongs to McAfee. Can anyone tell me should I delete this Dll or re-installed it since it's been isolated by Previx1. I have a Screen printout of Prevx1 with this DLL in holding cell should you like to look at it. My computer is still a little slow but almost back to normal now. I can't believe that McAfee didn't pick it up???
Post #3
Thanks for the link, I had two files (apparently same or identical) I sent both but the scan returned negative (no viruses).

This is what I found on the Prevx1 Web Site: http://info.prevx.com/knownissues.asp

"Mcafee have updated their Total Protection Agent Service which is causing drivers (not just Prevx) to blue screen if loaded at system startup. The issue is the Mcafee product forcably patches the loaded drivers with their own code (we are not sure why at this stage) and causes instability in the drivers loaded.
Prevx are working on a solution to protect the Prevx1 drivers against this forced patching to avoid future."
Regards,
Prevx Support

The problem is that the computer is slowing down to a crawl at times. I'm still not sure should I uninstall Prevx1 or the McAfee or both. I think I better scan it with HijackThis first and post the scan if anyone can see if there's anythything else there.
Post #4
Here it is:

Logfile of HijackThis v1.99.1
Scan saved at 5:07:17 PM, on 26/05/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\ewido\security suite\ewidoctrl.exe
c:\program files\mcafee.com\agent\mcdetect.exe
c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
C:\Program Files\Prevx1\PXAgent.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\AGRSMMSG.exe
c:\program files\mcafee.com\agent\mcagent.exe
C:\Program Files\Java\jre1.5.0_01\bin\jusched.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Prevx1\PXConsole.exe
C:\Program Files\Mozilla Firefox\firefox.exe
c:\PROGRA~1\mcafee.com\vso\mcvsshld.exe
c:\progra~1\mcafee.com\vso\mcvsescn.exe
c:\PROGRA~1\mcafee.com\vso\mcvsrte.exe
c:\PROGRA~1\mcafee.com\vso\mcshield.exe
C:\Documents and Settings\Desktop\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: Malicious Scripts Scanner - {55EA1964-F5E4-4D6A-B9B2-125B37655FCB} - C:\Documents and Settings\All Users\Application Data\Prevx\pxbho.dll
O2 - BHO: Yahoo! IE Services Button - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O3 - Toolbar: McAfee VirusScan - {BA52B914-B692-46c4-B683-905236F6F655} - c:\progra~1\mcafee.com\vso\mcvsshl.dll
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [VSOCheckTask] "c:\PROGRA~1\mcafee.com\vso\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [VirusScan Online] "c:\PROGRA~1\mcafee.com\vso\mcvsshld.exe"
O4 - HKLM\..\Run: [MCAgentExe] c:\PROGRA~1\mcafee.com\agent\mcagent.exe
O4 - HKLM\..\Run: [MCUpdateExe] c:\PROGRA~1\mcafee.com\agent\mcupdate.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_01\bin\jusched.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [PrevxOne] C:\Program Files\Prevx1\PXConsole.exe
O4 - HKLM\..\Run: [CleanUp] C:\PROGRA~1\McAfee.com\Shared\mcappins.exe /v=3 /cleanup
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O8 - Extra context menu item: Whois Lookup with &Whois Web - c:\program files\whois web\WWcontext.htm
O8 - Extra context menu item: Yahoo! &SMS - file:///C:\Program Files\Yahoo!\Common/ycsms.htm
O9 - Extra button: Trace - {04849C74-016E-4a43-8AA5-1F01DE57F4A1} - C:\Program Files\VisualRoute\vrie.dll
O9 - Extra 'Tools' menuitem: VisualRoute Trace - {04849C74-016E-4a43-8AA5-1F01DE57F4A1} - C:\Program Files\VisualRoute\vrie.dll
O9 - Extra button: Yahoo! Services - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O9 - Extra button: Locate - {B6F776D7-C231-11D4-8158-005004ADEFCA} - C:\Program Files\Software River Solutions\Visual WhoIs 2004\srstools.dll
O9 - Extra 'Tools' menuitem: Locate Using Visual WhoIs 2004 - {B6F776D7-C231-11D4-8158-005004ADEFCA} - C:\Program Files\Software River Solutions\Visual WhoIs 2004\srstools.dll
O9 - Extra button: Whois - {11E47140-F946-4049-B038-AB77CAA0480B} - c:\program files\whois web\WWtoolbar.htm (HKCU)
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} (McAfee.com Operating System Class) - http://download.mcafee.com/molbin/shared/m…83/mcinsctl.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} (DwnldGroupMgr Class) - http://download.mcafee.com/molbin/shared/m…,20/mcgdmgr.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{F99E90CD-A234-4D3F-B1C8-10541191A920}: NameServer = 203.2.75.132 198.142.0.51
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: ewido security suite control - ewido networks - C:\Program Files\ewido\security suite\ewidoctrl.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: McAfee WSC Integration (McDetect.exe) - McAfee, Inc - c:\program files\mcafee.com\agent\mcdetect.exe
O23 - Service: McAfee.com McShield (McShield) - Unknown owner - c:\PROGRA~1\mcafee.com\vso\mcshield.exe
O23 - Service: McAfee Task Scheduler (McTskshd.exe) - McAfee, Inc - c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
O23 - Service: McAfee SecurityCenter Update Manager (mcupdmgr.exe) - McAfee, Inc - C:\PROGRA~1\McAfee.com\Agent\mcupdmgr.exe
O23 - Service: McAfee.com VirusScan Online Realtime Engine (MCVSRte) - Networks Associates Technology, Inc - c:\PROGRA~1\mcafee.com\vso\mcvsrte.exe
O23 - Service: Prevx Agent (PREVXAgent) - Unknown owner - C:\Program Files\Prevx1\PXAgent.exe" -f (file missing)
Post #5
hi Hex,

sorry for delay. that last hjt log looks ok to me.

if everything is ok i leave you with this:


Be careful of what you download, and where you download it from. Many programs come bundled with extra software.You may be installing more than you think. Visit the makers website, learn more about the program, Does the program you want come bundled with other "3rd party" programs? What do the 3rd party programs do? Will they deliver ads? Track your surfing habits?. Read the EULA agreement, you know, that paragraph of stuff you "agree to" before the software installs? If you search hard enough you can always find a "clean" alternative to any software. Stay away from warez and crack sites. Becarful what you download from file sharing networks. If you are not sure, scan it with your Antivirus app. A small file (in KB) is probably not what you think it is. DO YOU TRUST THE SOURCE? Check this database:Spyware Guide A Few afew file sharing tips.

Make sure you keep your Windows OS current by visiting Windows update
occasionaly to download and install any critical updates and service packs. With out these you are leaving the backdoor open.

Adjust your browser settings: Change your(active x) settings in IE. With IE open go to tools, internet options, security tab. Click on the internet globe, then custom level. Set the first option "download signed active x controls" to prompt, the next two to disable. Read more:
Internet Explorer Privacy & Security Settings
Working with Internet Explorer 6 Security
Many exploits are directed at Internet Explorer, you dont have to use it. Try a different browser. You can have and use more than one browser on your computer.
Like Firefox,


Install a Firewall:A firewall will control what comes in from the internet and what leaves your computer to the internet. A firewall will also alert you when a application trys to connect to the internet from your computer, this is a good way to catch crapware or trojans, trying to connect out bound from your computer- whats that and why does it need a internet connection? You can deny it access it until more investigation is done. Zone Alarm is a free and easy to use firewall, that will provide in and outbound protection. Microsoft XP firewall only provides inbound protection. SP2 adds in and out bound protection which is better than nothing, but is not as robust as third party firewalls, Be sure to run only >one< firewall.If you use another, be sure to disable XP's built in firewall. If you use Zone Alarm learn what needs/uses your internet connection. If something unusal or out of the ordinary "asks" deny it access until more investigation is done.
Zone Alarm
OutPost Lite

Outlook Express with the default settings is not secure. It will run scripts, download images etc, just like a browser. You dont have to use it. Windows SP1/SP2 updates have made some improvments to Outlook. Another reason to stay updated.
look here
and here
Or try Pegasus Mail, safer by default,no tweaking needed.

Make sure you have and keep updated Antivirus software
Free for home users:
avast! 4 Home Edition Download
AVG free version 7.0
AntiVir Personal Edition
clam Win

Download one or two of these, install and update before using:(if these are constantly finding malware, then you need to make changes to your browser and or your habits)
CounterSpy Free trial version
Spybot Search and destroy
Ad-Aware SE Personal edition
Microsoft Windows Defender
Becarful with spyware "removers and scanners"– there are many "rogue/suspect" programs that "claim to remove" spyware.Check here first.

Dont be tempted to click on popup ads offering free scans or free downloads for malware removers. Read the above line again.

AntiTrojan software to fill in the gap:
a2 free
Ewido Anti-Malware
Trojan Hunter (30 day trial version)
Tauscan trial version

Other programs to consider:
Process Guard stop events/processes with user intervention
SpywareBlaster add security to IE
IE-SPYAD adds adware peddlers sites/domains to IE restricted zone
CleanUp cleans out temp files,history, autoforms etc
ATF cleaner (W2K,XP only) cleans out temp files, history etc

Learn More:
Browser Checkup
Parasite Free
Safe Hex
Shelf Lifes page
Home Computer Security
Post #6 last edited
Thanks SL, I decided to try the Zone Alarm as you suggested, Since I've been using the Win XP firewall for a very long time and was suspicious about it. Anyhow, I had no idea that so much traffic is happening in and out a computer. I, don't know what's happening but the Zone Alarm blocked access to more then 300 ports. Something or someone attempting to get in and out of the computer. Is that normal or do I have that many "good friends" out there who really love me and try to get in and out of my computer? I traced some of the IP's addresses but they're from all over the world, cannot say that anyone I know is that good!
Post #7
hi Hex, lots of traffic in/out of a computer. there will be traffic between your computer and cable modem also, even when your not on the internet. if ZA is blocking stuff, then its doing its job. are you using the free version of ZA?
Post #10
I some cases I get a pop up on the screen saying for example: DAP is trying to access the Internet Identification: Not Available Application: DAP Destination IP: "x.x.x.x" DNS Allow or Deny In other cases it's saying : The ZA has blocked this port "xxxxx" from "x.x.x.x" IP addresses trying to access your computer. Or something similar, in other words the port is blocked by the ZA, no questions asked whether to allow or deny. It also tells you if this same address tried to access your computer previously and the number of times. Its easy to run a check on these addresses using other programs, where they're from but that's about all. I always thought that all ports were closed by a default.
Post #11
hi Hex,

its good to familiarize yourself with what routinely needs a internet connection. if you have a trojan or something on your computer a firewall wont do much good if you allow it a connection.

you might also notice software asking for a connection, like your antivirus or even other silly stuff that dosnt need updating, one culprit is adobe reader (reads pdf files)


ports are closed by default. you open them by using apps, browser,e-mail etc. harmless, unless you happen to have some trojan or a vulnurable service. thats how nasties can get in.

https://www.grc.com/x/ne.dll?bh0bkyd2
Post #12
Glad we could be of assistance. This topic is now closed. If you wish it reopened, please send us an email (Click for address) with a link to your thread.

Do not bother contacting us if you are not the topic starter. A valid, working link to the closed topic is required along with the user name used. If the user name does not match the one in the thread linked, the email will be deleted.
Make sure you use proper prevention to keep from having problems occur to your computer in the future.

Coyote's Installed programs for prevention:

http://forums.tomcoyote.org/index.php?showtopic=31418

The help you receive here is free. If you wish to show your appreciation, then you may donate to help keep us online.

Visit the CoyoteStore http://TomCoyote.org/coyotestore.php

Ask AI

AI can make mistakes. Check the cited posts. Archived advice can be out-of-date

Don't include personal information. Questions and selected public posts go to OpenAI. About Ask AI