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Freezing computer


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11 replies to this topic

#1 keithontheshore

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Posted 17 July 2011 - 06:11 AM

I am running XP Pro sp3 and experiencing random freezes. I have done several scans for spyware and maleware that have come up clean. I have had other problems in the past , one being a nasty root kit that I received lots of help from the maleware forum. Not sure this problem should be in that forum or this one. Also since the root kit was removed i have had a problem with being able to have both users on this machine logged on at the same time. When switching between users, after about 3 minutes you hear the sound that the previous user was logged off. It is a inconvenience more than a problem, but it would be great to have this correct.
Thanks in advance for your help.

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#2 hamluis

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Posted 17 July 2011 - 06:26 AM

Hi :).

After some malware issues...system files may remain damaged and undetected.

The only sure way of overcoming such...is a clean install.

Alternately, you could try either a repair install of XP or the sfc /scannow command.

There are many reasons for sytem freezeups, including overheating.

Cleaning the Interior of your PC - http://www.bleepingcomputer.com/tutorials/cleaning-the-inside-of-your-pc/

COMPUTER FREEZES - http://www.jrwhipple.com/computer_hangs.html

Louis

Your malware topic was over a year ago and you have since opened at least 4 topics re possible problems with malware/system implications. Let's try to get to the root of what is wrong here.

Edited by hamluis, 17 July 2011 - 06:30 AM.


#3 keithontheshore

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Posted 17 July 2011 - 10:59 AM

Hello Louis and thanks for the fast reply. Your help is greatly appreciated. I would be interested in doing a clean install to get this machine back to original configuration. I have many pictures, data files, and some music files along with some programs i would like to retain. I have a separate external hard drive available to transfer to, but am not knowledgeable enough to know if any malicious software would transfer also. I will wait for your guidance on what to do first, physically clean machine, transfer files or none of the above.

Thanks Keith

#4 hamluis

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Posted 17 July 2011 - 11:27 AM

Well...I'm really not the one to answer a question...concerning what should be moved from an infected system safely. I'm not qualified to assess your system unseen or otherwise (I have no malware training in my background) and I don't have access to your system.

I believe that your questions about such...should be posted at http://www.bleepingcomputer.com/forums/forum103.html .

I will move your topic to that forum.

Louis

#5 keithontheshore

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Posted 17 July 2011 - 06:41 PM

Thanks Louis
I will wait for someone to pick this topic up.

Thanks Louis

#6 boopme

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Posted 22 July 2011 - 08:15 AM

Hello,your pictures and legit music files should be OK.
Caution: If you are considering backing up data and reformatting, keep in mind, with a Virut infection, there is always a chance of backed up data reinfecting your system. If the data is that important to you, then you can try to salvage some of it but there is no guarantee so be forewarned that you may have to start over again afterwards if reinfected by attempting to recover your data. Only back up your important documents, personal data files, photos to a CD or DVD drive, not a flash drive or external hard drive as they may become compromised in the process. The safest practice is not to backup any executable files (*.exe), screensavers (*.scr), autorun (.ini) or script files (.php, .asp, .htm, .html, .xml ) files because they may be infected by malware. Avoid backing up compressed files (.zip, .cab, .rar) that have executables inside them as some types of malware can penetrate compressed files and infect the .exe files within them. Other types of malware may even disguise itself by hiding a file extension or adding to the existing extension as shown here (click Figure 1 to enlarge) so be sure you look closely at the full file name. If you cannot see the file extension, you may need to reconfigure Windows to show file name extensions. Then make sure you scan the backed up data with your anti-virus prior to to copying it back to your hard drive.

If your CD/DVD drive is unusable, another word of caution if you are considering backing up to an external usb hard drive as your only alternative. External drives are more susceptible to infection and can become compromised in the process of backing up data. I'm not saying you should not try using such devices but I want to make you aware of all your options and associated risks so you can make an informed decision if its worth that risk.Again, do not back up any files with the following file extensions: exe, .scr, .ini, .htm, .html, .php, .asp, .xml, .zip, .rar, .cab as they may be infected.

If you're not sure how to reformat or need help with reformatting, please review:These links include step-by-step instructions with screenshots:Vista users can refer to these instructions:Don't forget you will have to go to Microsoft Update and apply all Windows security patches after reformatting.

Note: If you're using an IBM, Sony, HP, Compaq or Dell machine, you may not have an original XP CD Disk. By policy Microsoft no longer allows OEM manufactures to include the original Windows XP CD-ROM on computers sold with Windows preinstalled. Instead, most computers manufactured and sold by OEM vendors come with a vendor-specific Recovery Disk or Recovery Partition for performing a clean "factory restore" that will reformat your hard drive, remove all data and restore the computer to the state it was in when you first purchased it. See Technology Advisory Recovery Media. If the recovery partition has become infected, you will need to contact the manufacturer, explain what happened and ask them to send full recovery disks to use instead..

If you need additional assistance with reformatting or partitioning, you can start a new topic in the Operating Systems Subforums forum.
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#7 keithontheshore

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Posted 30 July 2011 - 05:05 AM

Hey Boop
After reading into re formatting and also reading how some malicious crap ruins the hard drive I wonder if this machine is deeply infected? I ran a gmer scan for you to look at. I will await your reply before doing anything else. thanks for your help.

Keith


ps
McAfee scan keeps showing 1 trojan, but will not remove it.







GMER 1.0.15.15641 - http://www.gmer.net
Rootkit quick scan 2011-07-30 05:50:28
Windows 5.1.2600 Service Pack 3 Harddisk0\DR0 -> \Device\Ide\IdeDeviceP0T0L0-3 WDC_WD800BB-75FRA0 rev.77.07W77
Running: 31864iti.exe; Driver: C:\DOCUME~1\KEITHB~1\LOCALS~1\Temp\fwtyapob.sys


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

Disk \Device\Harddisk0\DR0 malicious Win32:MBRoot code @ sector 156232128
Disk \Device\Harddisk0\DR0 PE file @ sector 156232150

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

Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwDeleteKey [0xF861D226]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwDeleteValueKey [0xF861D252]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwMapViewOfSection [0xF861D2A8]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwOpenKey [0xF861D1FC]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwOpenProcess [0xF861D1D4]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwOpenThread [0xF861D1E8]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwRenameKey [0xF861D23C]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwSetSecurityObject [0xF861D27E]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwTerminateProcess [0xF861D2D2]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwUnmapViewOfSection [0xF861D2BE]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) ZwYieldExecution [0xF861D292]
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) NtMapViewOfSection
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) NtOpenProcess
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) NtOpenThread
Code mfehidk.sys (McAfee Link Driver/McAfee, Inc.) NtSetSecurityObject

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

AttachedDevice \FileSystem\Ntfs \Ntfs mfehidk.sys (McAfee Link Driver/McAfee, Inc.)
AttachedDevice \FileSystem\Fastfat \Fat mfehidk.sys (McAfee Link Driver/McAfee, Inc.)
AttachedDevice \Driver\Tcpip \Device\Ip mfetdi2k.sys (Anti-Virus Mini-Firewall Driver/McAfee, Inc.)
AttachedDevice \Driver\Tcpip \Device\Tcp mfetdi2k.sys (Anti-Virus Mini-Firewall Driver/McAfee, Inc.)
AttachedDevice \Driver\Tcpip \Device\Udp mfetdi2k.sys (Anti-Virus Mini-Firewall Driver/McAfee, Inc.)
AttachedDevice \Driver\Tcpip \Device\RawIp mfetdi2k.sys (Anti-Virus Mini-Firewall Driver/McAfee, Inc.)

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

#8 boopme

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Posted 30 July 2011 - 09:27 AM

To check for and confirm the MBR (Master Boot Record) rootkit.


Please download mbr.exe and save it to the root directory, usually C:\ <- (Important!).
  • Go to Start > Run and type: cmd.exe
  • press Ok.
  • At the command prompt type: c:\mbr.exe >>"C:\mbr.log"
  • press Enter.
  • The process is automatic...a black DOS window will open and quickly disappear. This is normal.
  • A log file named mbr.log will be created and saved to the root of the system drive (usually C:\).
  • Copy and paste the results of the mbr.log in your next reply.
If you have a problem using the command prompt, you can just double-click on mbr.exe to run the tool.
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#9 keithontheshore

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Posted 30 July 2011 - 12:43 PM

thanks for the quick reply. the mbr log is below


Stealth MBR rootkit/Mebroot/Sinowal/TDL4 detector 0.4.2 by Gmer, http://www.gmer.net
Windows 5.1.2600 Disk: WDC_WD800BB-75FRA0 rev.77.07W77 -> Harddisk0\DR0 -> \Device\Ide\IdeDeviceP0T0L0-3

device: opened successfully
user: MBR read successfully
kernel: MBR read successfully
user & kernel MBR OK
copy of MBR has been found in sector 156232125

#10 boopme

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Posted 30 July 2011 - 06:23 PM

Looks good in there so I think you can proceed.
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#11 keithontheshore

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Posted 31 July 2011 - 06:27 AM

thanks for your advice.

#12 boopme

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Posted 31 July 2011 - 05:14 PM

You're welcome!!
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook




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