Scanning with ComboFix and Malwarebytes in safe or normal mode will work but removal functions are not as powerful in safe mode
. For optimal removal, normal mode is recommended
so it does not limit the abilities of these tools.
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 (see here
) who is assisting them deal with a malware problem. When issues arise due to complex malware infections, possible false detections, 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. 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. Using this tool incorrectly could lead to disastrous problems with your operating system such as preventing it from ever starting again.
Also be aware that 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. 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.
With that said, there are circumstances ComboFix will hang
or stall at various stages
due to malware interference, failure to disable other real-time protection tools or the presence of CD Emulators
, Alchohol 120%
) 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.
Since you already ran ComboFix and the ZeroAccess (Max++) Rootkit
was detected, the log (if one was created) should be reviewed by our experts in order to ascertain what was detected and removed.ZeroAccess
(aka: Sirefef) is a sophisticated rootkit that uses advanced technology to hide its presence in a system and can infect both x86 and x64 platforms. ZeroAccess is similar to the TDSS rootkit but has more self-protection mechanisms that can be used to disable anti-virus software resulting in "Access Denied" messages whenever you run a security application. For more specific information about this infection, please refer to:
Please follow the instructions in the Preparation Guide For Requesting Help
starting at Step 6. When you have done that, start a new topic and post the required logs to include your ComboFix log
in the Virus, Trojan, Spyware, and Malware Removal Logs
forum, NOT here
, for assistance by the Malware Response Team Experts. After doing this, please reply back in this thread with a link to the new topic so we can closed this one.If HelpBot replies to your topic, please follow Step One so it will report your topic to the team members.
Note: If you're not sure where to find the log, ComboFix will create and save it to the root directory, usually C:\ComboFix.txt
. To retrieve the log, launch Windows Explorer, navigate to the root directory and double-click on it to open in Notepad. If no log was created, then disregard this step.