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Combofix Freezes at preparing to run screen


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#1 Persadius

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Posted 20 April 2011 - 02:30 PM

There is a file that runs in task manager after combofix starts for a brief period of time called "catchme.tmp" Icons are hidden on desktop, Programs and files missing from Start Menu. any help would be appreciated. Combofix freezes on the screen " preparing to run, may take 10 minutes" Hard drive activity stops and computer locks up. Let it go for hours overnight and still stuck.

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#2 hamluis

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Posted 20 April 2011 - 02:44 PM

ComboFix usage, Questions, Help - Look here - http://www.bleepingcomputer.com/forums/topic273628.html

Louis

#3 Persadius

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Posted 20 April 2011 - 03:43 PM

That was no help. I am sure there is a virus on the machine in question. Just looking to see if anyone has dealt with one that freezes up combofix called "catchme". Icon's on desktop are hidden and nothing is in the programs list in start menu. 25year IT professional. May just reload the machine but would rather solve the issue for learning purposes.

#4 quietman7

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Posted 21 April 2011 - 09:42 AM

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. This is because people should not be using ComboFix without being advised to do so by a trained expert (i.e. Malware Response Team) who is assisting a member deal a malware issue on that system. When issues arise due to complex malware infections, possible false detections, problems running ComboFix 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. When false detections are identified, experts have access to the developer and can report them so he can investigate, confirm and make corrections. Those attempting to use ComboFix on their own do not have such information and are at risk when running the tool in an unsupervised environment.

With that said, ComboFix will temporarily disable your desktop, and if interrupted may leave it disabled. Catchme is a rootkit scanner that detects userland rootkits and is incorporated with some specialized fix tools like Combofix and GMER.

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 CF stalled/crashed and to provide that information to the Helper who is assisting you so they can investigate. This is just another reason why you should only use ComboFix under supervision.

If you need assistance with a malware infection, please read the "Preparation Guide".
  • If you cannot complete a step, then skip it and continue with the next.
  • In Step 7 there are instructions for downloading and running DDS which will create a Pseudo HJT Report as part of its log.
  • When you have done that, post your log in the Virus, Trojan, Spyware, and Malware Removal Logs forum, NOT here, for assistance by the Malware Response Team Experts.

Note: Using ComboFix is only one part of the disinfection process. Preliminary scans from other tools like DDS, RSIT and GMER should be used first because they provide comprehensive logs with specific details about files, folders and registry keys which may have been modified by malware infection. Analysis of those logs allows planning an strategy for effective disinfection and a determination if using ComboFix is necessary. ComboFix was never meant to be used as a general purpose malware scanner like SuperAntispyware or Malwarebytes' Anti-Malware which scan individual drives or different folders on a computer for viruses.
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