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ComboFix Hanging


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8 replies to this topic

#1 tenz

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Posted 19 November 2008 - 03:17 PM

Hey Guys,

Not sure if this is in the right place, but im a computer tech, and I frequently use ComboFix for malware Removal. I have a machine that is hanging after stage 50. exact quote is

Completed Stage_50


Deleting Files:

C:\WINDOWS\system32\mst120.dll



After this it has ben hanging for about a half hour now. I know combofix is a very powerful tool, and i dont want to just end the program or restart because i dont want to mess up anything. Any suggestions...

BTW,

Older Compaq Presario, 512 ram, 2.6 ghz P4 windows XP


Thanks for the response,

Tenz

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#2 Zllio

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Posted 21 November 2008 - 08:07 AM

Hi tenz,

Sometimes Combofix gets a bug or the computer has an oddity that makes it respond differently.

Combofix keeps a backup of deleted files. You'll have to end the program to see if the computer is still working. See how the computer is working and look for that particular file in the combofix backups. In some cases, it's necessary to go into the computer with a cd or with Linux from a different partition, but it's very seldom that you have to do anything that extreme.

Just a note: The file size of mst120.dll should be around 250-270 kb (approx. 250,000 bytes)

Edited by Zllio, 21 November 2008 - 08:22 AM.


#3 ruby1

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Posted 21 November 2008 - 11:48 AM

ComboFix is a tool that should only be run under the supervision of someone who has been trained in its use. Using it on your own can cause problems with your computer.



Could you please tell us exactly what the problem is you are trying to sort out on the computer so we can recommend appropriate tools for you ; you are recommended NOT to run the ComboFix tool unless instructed by a Trained Malaware Expert ; to do so unsupervised can render a computer forever unbootable

#4 tenz

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Posted 22 November 2008 - 12:44 AM

Thank you for the replys guys.

Ruby, thanks for the disclaimer but i am a professional technician and have been using combofix for a very long time, this is the first time that this has happened to me, which is why i posted.

To update the situation (should have posted this earlier, but have been quite busy), i was working on a number of computers at the time this happened so i decided to leave it be while i continued on the other machines. After a while, (over an hour at least), it passed the hang point and finished up as usual. Must have just hit a snag in the road.

I was only worried because although i have had some combofix hangs before, it was never at this point in the process, and never for so long.

#5 ruby1

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Posted 22 November 2008 - 04:56 AM

with the greatest of respect , there is a difference between being a

professional technician

and a Trained Malware Expert;

The ComboFix Tool is a tool that should only be run under the supervision of someone who has been trained in its use. Using it on your own can cause problems with your computer


Running this tool unsupervised CAN ( and in some instances HAS rendered ) render a computer for ever unbootable

again , perhaps you could tell us the symptoms the computer has, so appropriate tools can be suggested?

#6 KoanYorel

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Posted 22 November 2008 - 05:06 AM

Actually , you will follow our rules here to receive help.

'To receive help, you should instead provide a detailed description of your problem, detailed word-for-word error messages that you are receiving, screenshots of strange behavior, and your operating system.' Otherwise....
The only easy day was yesterday.

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#7 tenz

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Posted 23 November 2008 - 12:52 AM

No Disrespect meant to anyone guys, Issue was cleared up. I posted prematurely and everything is fine now. I appreciate your tryin to help me out.

#8 psion13

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Posted 31 March 2017 - 10:20 AM

I dislike ruby1 and KoanYorel.

 

Very much.



#9 quietman7

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Posted 31 March 2017 - 03:09 PM

You have replied to a topic almost 9 years old and ComboFix has gone through several changes/updates since then. Further, commenting that you dislike two previous posters because of the information they provided is disrespectful and not a way to get assistance.

As a general policy, Bleeping Computer does not offer advice on how to run ComboFix unless we asked someone to run it or if there is a problem with the computer caused by running the tool. We recommend that people should not be using ComboFix without being advised to do so by a trained expert (see here) who is assisting them deal with a malware problem. When issues arise due to complex malware infections, problems running ComboFix (i.e. stalling, hanging, crashing) or with other security tools causing conflicts, experts are usually aware of them and can advise what should or should not be done while providing individual assistance.

With that said, there are circumstances ComboFix will hang, crash or stall at various stages due to malware interference, failure to disable other real-time protection tools or the presence of CD Emulators (Daemon Tools, Alchohol 120%, Astroburn, AnyDVD) so that it does not complete successfully. Also, depending on how badly a system is infected, ComboFix may take longer to complete its routine than it normally does or fail to run properly. While that is not normal behavior, it is not unusual. In such cases, it is helpful to know at what stage ComboFix stalled/crashed and to provide that information to the Helper who is assisting you so they can investigate. Using Task Manager to stop ComboFix's related process usually is enough to abort it.

If that is the issue you are having, then open Task Manager and look for the following ComboFix related processes (some have a .3XE extension):
  • PEV.exe
  • NirCmd.3XE
  • PEV.3XE
  • SED
  • GREP
  • any file that has the extension *.3XE except CF*****.3XE <- do not end this process
One at a time, right-click and select End Process. If doing that did not free ComboFix and allow it to continue, then you will need to reboot the computer manually.

Afterwards, if you need further assistance with a malware infection, please follow the instructions in the Malware Removal and Log Section Preparation Guide. When you have done that, start a new topic and post your logs in the Virus, Trojan, Spyware, and Malware Removal Logs forum, NOT here, for assistance by the Malware Response Team.

If you choose to follow the above instructions and post a FRST log, please reply back in this thread with a link to the new topic. If not, at least you know doing that is an option available to you.
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