As a general policy, Bleeping Computer does not offer advice
on how to run ComboFix unless we asked someone to run it. 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.
Further, using ComboFix is only one part of the disinfection process. Preliminary scans from other tools like DDS
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. Please read the pinned topic ComboFix usage, Questions, Help? - Look here
If you need assistance with a malware infection that requires using ComboFix, please read the "Preparation Guide For Use Before Using Malware Removal Tools and Requesting Help
- 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.
- If you already ran ComboFix, include the log (ComboFix.txt) in your topic. It should have been saved to your root directory, usually C:\.
Note: ComboFix will not run
if AVG anti-virus is installed as a protective measure against the actions of the scanning engine. This is because AVG "falsely
" detects ComboFix (or its embedded files) as a threat and may remove them. If some of these files are removed, ComboFix will not perform its routines properly and the developer has determined this can cause damaging or "unpredictable results"
. Normally this is avoided by temporarily disabling the anti-virus until ComboFix has been run but AVG cannot be effectively disabled. After restarting the computer, AVG re-enables all protections even if it hasn't passed the 15 minute time limit. As such, the developer has chosen not to allow his tool to run until the anti-virus is uninstalled first in order to avoid any potential problems. Please understand that this is an issue with the anti-virus and not with ComboFix. If you uninstalled AVG and ComboFix is still detecting it as present, then the uninstall most likely did not completely remove all traces
of files/folders/registry entries which were created during the installation.
You can download and use AVG's uninstall/cleanup utility (AVG Remover
) provided in the AVG 2011+9.0+8.x Uninstall/Re-Install Instructions
. After restarting and removing the folders, stop where instructed to Stop here if not re-installing
. If you have difficulty uninstalling the anti-virus, download and use Opswat AppRemover
Edited by quietman7, 09 May 2011 - 07:23 AM.