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A particular svchost.exe is hogging cpu :(


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#1 supernerd

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Posted 29 August 2011 - 05:58 PM

Hello, :hello:

I am having trouble with a certain svchost on a Windows XP Pro SP3 5.1.2600 box. The said service host alternately uses either nearly 100% cpu or 0% (%CPU usage looks like a square wave with random slow frequency). This does not happen in normal safe mode or safe mode with command prompt, but it does happen in safe mode w/ networking.

I am trying to find the responsible dll but unfortunately it runs 29 services. After some googling I found that windows update had a bug that can cause this behavior. So I tried stopping wuauserv using ProcessExplorer while the cpu was being maxed out to see if it would drop back down to a normal level but this had absolutely no effect. Thus I must conclude it is not windows update, or at least not wuauserv.

What is the most convenient way for me to figure out the guilty dll? Is there a way to see which services are using what cpu %? All other people that had this problem were able to fix it by switching windows update to manual but this does not work for me.

Here is what >>tasklist /SVC outputs(problem is with PID 1196):

Image Name                   PID Services                                     
========================= ====== =============================================
System Idle Process            0 N/A                                          
System                         4 N/A                                          
smss.exe                     564 N/A                                          
avgchsvx.exe                 612 N/A                                          
csrss.exe                    768 N/A                                          
winlogon.exe                 792 N/A                                          
services.exe                 840 Eventlog, PlugPlay                           
lsass.exe                    852 PolicyAgent, ProtectedStorage, SamSs         
svchost.exe                 1012 DcomLaunch, TermService                      
svchost.exe                 1096 RpcSs                                        
svchost.exe                 1196 AudioSrv, BITS, Browser, CryptSvc, Dhcp,     
                                 dmserver, ERSvc, EventSystem,                
                                 FastUserSwitchingCompatibility, helpsvc,     
                                 lanmanserver, lanmanworkstation, Netman,     
                                 Nla, RasMan, Schedule, seclogon, SENS,       
                                 SharedAccess, ShellHWDetection, srservice,   
                                 TapiSrv, Themes, TrkWks, W32Time, winmgmt,   
                                 wscsvc, wuauserv, WZCSVC                     
svchost.exe                 1316 Dnscache                                     
svchost.exe                 1684 LmHosts, RemoteRegistry, SSDPSRV             
explorer.exe                1716 N/A                                          
spoolsv.exe                 1972 Spooler                                      
svchost.exe                  132 WebClient                                    
avgwdsvc.exe                 192 avgwd                                        
jqs.exe                      212 JavaQuickStarterService                      
AVGIDSAgent.exe             1452 AVGIDSAgent                                  
avgnsx.exe                  1416 N/A                                          
avgemcx.exe                 1352 N/A                                          
hkcmd.exe                   3132 N/A                                          
reader_sl.exe               3140 N/A                                          
AdobeARM.exe                3164 N/A                                          
jusched.exe                 3176 N/A                                          
smax4pnp.exe                3188 N/A                                          
avgtray.exe                 3204 N/A                                          
alg.exe                     3256 ALG                                          
ctfmon.exe                  3288 N/A                                          
RtWLan.exe                  3348 N/A                                          
soffice.exe                 3480 N/A                                          
soffice.bin                 3548 N/A                                          
AVGIDSMonitor.exe            472 N/A                                          
taskmgr.exe                 3432 N/A                                          
cmd.exe                     1444 N/A                                          
firefox.exe                 2932 N/A                                          
plugin-container.exe        3680 N/A                                          
wmiprvse.exe                1516 N/A                                          
avgrsx.exe                  2372 N/A                                          
avgcsrvx.exe                1032 N/A                                          
tasklist.exe                3520 N/A                                          

I will greatly appreciate any help or advice!

Thanks a ton,
supernerd

PS- FYI I am not very good with Windows, being mostly a Linux/Unix guy. Windows stumps me a lot and I don't understand it that well. So sorry if this is a really easy or a dumb question.

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#2 cryptodan

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Posted 29 August 2011 - 06:07 PM

Hello,

And welcome to BleepingComputer.com, before we can assist you with your question of: Am I infected? You will need to perform the following tasks and post the logs of each if you can.

Malwarebytes Anti-Malware

NOTEMalwarebytes is now offering a free trial of their program, if you want to accept it you will need to enter some billing information, so that at the end of the trial you would be charged the cost of the product. Please decline this offer, if you are unable to provide billing information. If you want to try it out, then provide the billing information.

Please download Malwarebytes Anti-Malware and save it to your desktop.
Download Link 1
Download Link 2MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you. Temporarily disable such programs or permit them to allow the changes.

  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
    For instructions with screenshots, please refer to the How to use Malwarebytes' Anti-Malware Guide.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself. Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the definition updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Full Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.


SUPERAntiSpyware:

Please download and scan with SUPERAntiSpyware Free

  • Double-click SUPERAntiSypware.exe and use the default settings for installation.
  • An icon will be created on your desktop. Double-click that icon to launch the program.
  • If it will not start, go to Start > All Prgrams > SUPERAntiSpyware and click on Alternate Start.
  • If asked to update the program definitions, click "Yes". If not, update the definitions before scanning by selecting "Check for Updates". (If you encounter any problems while downloading the updates, manually download them from here. Double-click on the hyperlink for Download Installer and save SASDEFINITIONS.EXE to your desktop. Then double-click on SASDEFINITIONS.EXE to install the definitions.)
  • In the Main Menu, click the Preferences... button.
  • Click the "General and Startup" tab, and under Start-up Options, make sure "Start SUPERAntiSpyware when Windows starts" box is unchecked.
  • Click the "Scanning Control" tab, and under Scanner Options, make sure the following are unchecked (leave all others checked):
    • Ignore files larger then 4mb
    • Ignore non-executable files

    Now Perform the scan with SUPERAntiSpyware as follows:
    • Launch the program and back on the main screen, under "Scan for Harmful Software" click Scan your computer.
    • On the left, make sure you check C:\Fixed Drive.
    • On the right, under "Complete Scan", choose Perform Complete Scan and click "Next".
    • After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
    • Make sure everything has a checkmark next to it and click "Next".
    • A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
    • If asked if you want to reboot, click "Yes" and reboot normally.
    • To retrieve the removal information after reboot, launch SUPERAntispyware again.[list]
    • Click Preferences, then click the Statistics/Logs tab.
    • Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
    • If there are several logs, click the current dated log and press View log. A text file will open in your default text editor.
    • Please copy and paste the Scan Log results in your next reply.
  • Click Close to exit the program.

SAS Portable
If you have a problem downloading, installing or getting SAS to run, try downloading and using the SUPERAntiSpyware Portable Scanner instead. Save the randomly named file (i.e. SAS_1710895.COM) to a usb drive or CD and transfer to the infected computer. Then double-click on it to launch and scan. The file is randomly named to help keep malware from blocking the scanner.


Now GMER

GMER does not work in 64bit Mode!!!!!!

Please download GMER from one of the following locations and save it to your desktop:

  • Main Mirror
    This version will download a randomly named file (Recommended)
  • Zipped Mirror
    This version will download a zip file you will need to extract first. If you use this mirror, please extract the zip file to your desktop.
  • Disconnect from the Internet and close all running programs.
  • Temporarily disable any real-time active protection so your security programs will not conflict with gmer's driver.
  • Double-click on the randomly named GMER file (i.e. n7gmo46c.exe) and allow the gmer.sys driver to load if asked.
  • Note: If you downloaded the zipped version, extract the file to its own folder such as C:\gmer and then double-click on gmer.exe.

    Posted Image
  • GMER will open to the Rootkit/Malware tab and perform an automatic Full Scan when first run. (do not use the computer while the scan is in progress)
  • If you receive a WARNING!!! about rootkit activity and are asked to fully scan your system...click NO.
  • Now click the Scan button. If you see a rootkit warning window, click OK.
  • When the scan is finished, click the Save... button to save the scan results to your Desktop. Save the file as gmer.log.
  • Click the Copy button and paste the results into your next reply.
  • Exit GMER and be sure to re-enable your anti-virus, Firewall and any other security programs you had disabled.
-- If you encounter any problems, try running GMER in safe mode.
-- If GMER crashes or keeps resulting in a BSODs, uncheck Devices on the right side before scanning
.


All scans above should be performed in regular boot mode, and if that is not possible then I will post instructions in a follow up reply on how to get into Safe Mode to perform the scans. Also all scans should be COMPLETE and not quick unless specifically instructed to do so.

#3 supernerd

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Posted 30 August 2011 - 12:17 PM

Hi cryptodan,

First I forgot to mention that the particular svchost crashes somtimes as well.

"And welcome to BleepingComputer.com, before we can assist you with your question of: Am I infected? You will need to perform the following tasks and post the logs of each if you can."

Note that I did not ask if I was infected. Nevertheless I did as you asked and I did catch a few viruses using mbam. I saved the logs before I quarantined the virus so "no action taken" in the mbam log is inaccurate. Removing the malware does not take care of the problem either, so the answer lies elsewhere. So here are the logs:

mbam:

Malwarebytes' Anti-Malware 1.51.1.1800
www.malwarebytes.org

Database version: 7607

Windows 5.1.2600 Service Pack 3
Internet Explorer 7.0.5730.13

8/29/2011 17:31:26
mbam-log-2011-08-29 (17-31-19).txt

Scan type: Full scan (C:\|D:\|E:\|)
Objects scanned: 183901
Time elapsed: 51 minute(s), 39 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 3

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
c:\documents and settings\administrator\local settings\Temp\srv1C0.tmp (Trojan.Agent) -> No action taken.
c:\documents and settings\administrator\local settings\Temp\srv490.tmp (Trojan.Agent) -> No action taken.
c:\documents and settings\all users\documents\setup1911.fon (Trojan.Agent) -> No action taken.

SAS:

SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 08/29/2011 at 06:19 PM

Application Version : 5.0.1118

Core Rules Database Version : 7618
Trace Rules Database Version: 5430

Scan type       : Complete Scan
Total Scan Time : 00:35:59

Operating System Information
Windows XP Professional 32-bit, Service Pack 3 (Build 5.01.2600)
Administrator

Memory items scanned      : 444
Memory threats detected   : 0
Registry items scanned    : 34420
Registry threats detected : 0
File items scanned        : 43930
File threats detected     : 24

Adware.Tracking Cookie
	C:\Documents and Settings\Administrator\Cookies\administrator@ad.wsod[2].txt
	C:\Documents and Settings\Administrator\Cookies\administrator@atdmt[2].txt
	cdn.insights.gravity.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	core.insightexpressai.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	C:\Documents and Settings\Administrator\Cookies\administrator@doubleclick[1].txt
	crackle.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	C:\Documents and Settings\Administrator\Cookies\administrator@www.windowsmedia[2].txt
	dlr1.wdpromedia.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	ia.media-imdb.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	media.ign.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	media.movieweb.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	media.mtvnservices.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	media.salemwebnetwork.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	media.scanscout.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	media1.break.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	objects.tremormedia.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	s0.2mdn.net [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	secure-us.imrworldwide.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	serving-sys.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	spe.atdmt.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	speed.pointroll.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	static.2mdn.net [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	video.redorbit.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]
	www.naiadsystems.com [ C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\MACROMEDIA\FLASH PLAYER\#SHAREDOBJECTS\C8WW8LE2 ]

GMER:

GMER 1.0.15.15641 - http://www.gmer.net
Rootkit scan 2011-08-29 21:56:32
Windows 5.1.2600 Service Pack 3 Harddisk0\DR0 -> \Device\Ide\IdePort0 ST340014A rev.8.16
Running: lle21kyi.exe; Driver: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\pxncifob.sys


---- System - GMER 1.0.15 ----

SSDT            \SystemRoot\system32\DRIVERS\AVGIDSShim.Sys (IDS Application Activity Monitor Loader Driver./AVG Technologies CZ, s.r.o. )  ZwOpenProcess [0xF8F57738]
SSDT            \??\C:\Program Files\SUPERAntiSpyware\SASKUTIL.SYS (SASKUTIL.SYS/SUPERAdBlocker.com and SUPERAntiSpyware.com)               ZwTerminateProcess [0xEE7FA640]
SSDT            \SystemRoot\system32\DRIVERS\AVGIDSShim.Sys (IDS Application Activity Monitor Loader Driver./AVG Technologies CZ, s.r.o. )  ZwTerminateThread [0xF8F57878]
SSDT            \SystemRoot\system32\DRIVERS\AVGIDSShim.Sys (IDS Application Activity Monitor Loader Driver./AVG Technologies CZ, s.r.o. )  ZwWriteVirtualMemory [0xF8F57914]

---- Kernel code sections - GMER 1.0.15 ----

?               jpgjm.sys                                                                                                                   The system cannot find the file specified. !
init            C:\WINDOWS\system32\drivers\senfilt.sys                                                                                     entry point in "init" section [0xF87A0F80]

---- User code sections - GMER 1.0.15 ----

.text           C:\WINDOWS\System32\svchost.exe[1200] USER32.dll!GetCursorPos                                                               7E42974E 5 Bytes  JMP 025A000A 
.text           C:\WINDOWS\System32\svchost.exe[1200] USER32.dll!WindowFromPoint                                                            7E429766 5 Bytes  JMP 025B000A 
.text           C:\WINDOWS\System32\svchost.exe[1200] USER32.dll!GetForegroundWindow                                                        7E429823 5 Bytes  JMP 025C000A 
.text           C:\WINDOWS\System32\svchost.exe[1200] ole32.dll!CoCreateInstance                                                            774FF1AC 5 Bytes  JMP 00D4000A 

---- Devices - GMER 1.0.15 ----

AttachedDevice  \FileSystem\Ntfs \Ntfs                                                                                                      AVGIDSFilter.Sys (IDS Application Activity Monitor Filter Driver./AVG Technologies CZ, s.r.o. )
AttachedDevice  \Driver\Tcpip \Device\Ip                                                                                                    avgtdix.sys (AVG Network connection watcher/AVG Technologies CZ, s.r.o.)
AttachedDevice  \Driver\Tcpip \Device\Tcp                                                                                                   avgtdix.sys (AVG Network connection watcher/AVG Technologies CZ, s.r.o.)

Device          \Driver\atapi -> DriverStartIo \Device\Ide\IdeDeviceP1T1L0-17                                                               825AE2E0
Device          \Driver\atapi -> DriverStartIo \Device\Ide\IdePort0                                                                         825AE2E0
Device          \Driver\atapi -> DriverStartIo \Device\Ide\IdeDeviceP0T0L0-3                                                                825AE2E0
Device          \Driver\atapi -> DriverStartIo \Device\Ide\IdePort1                                                                         825AE2E0
Device          \Driver\atapi -> DriverStartIo \Device\Ide\IdeDeviceP1T0L0-f                                                                825AE2E0

AttachedDevice  \Driver\Tcpip \Device\Udp                                                                                                   avgtdix.sys (AVG Network connection watcher/AVG Technologies CZ, s.r.o.)
AttachedDevice  \Driver\Tcpip \Device\RawIp                                                                                                 avgtdix.sys (AVG Network connection watcher/AVG Technologies CZ, s.r.o.)

---- Disk sectors - GMER 1.0.15 ----

Disk            \Device\Harddisk0\DR0                                                                                                       sector 00: rootkit-like behavior

---- EOF - GMER 1.0.15 ----


Regards

#4 cryptodan

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Posted 30 August 2011 - 12:26 PM

Disk \Device\Harddisk0\DR0 sector 00: rootkit-like behavior


Per the above, Please follow the instructions in ==>Malware Removal and Log Section Preparation Guide<==.

Once the proper logs are created, then make a NEW TOPIC and post it ==>HERE<== Please include the link to this topic in your new topic and a description of your computer issues and what you have done to resolve them.

If you can produce at least some of the logs, then please create the new topic and explain what happens when you try to create the log(s) that you couldn't get. If you cannot produce any of the logs, then still post the topic and explain that you followed the Prep. Guide, were unable to create the logs, and describe what happens when you try to create the logs.

Once you have created the new topic, please reply back here with a link to the new topic.

Most importantly please be patient till you get a reply to your topic.

#5 supernerd

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Posted 30 August 2011 - 12:37 PM

I see. I'll do that. Thanks for your help! :)




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