Custom Scan is on its 25 hours and still not complete!!

[Envy14]

Hi all, 
In one of my laptops, Malwarebytes detected some threats I deleted them and after that, I ran a custom (full) scan on all my laptops the custom (full) scan took about 12 to 14 hours, then after one day I ran a custom scan to all my laptops again but this time I took way too long right now it's on  25 hours and the scan is still not complete! knowing that I didn't add any more data I just ran it once again so what's the problem in your opinion?

is a custom (full) scan is necessary in case of suspecting any threats or is a regular scan is enough!

P.S: the (scan for rootkits) is turned on both scans.

Thanks in advance.

[Malwarebytes]

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[Porthos]

57 minutes ago, Envy14 said:

is a custom (full) scan is necessary in case of suspecting any threats or is a regular scan is enough!

Malwarebytes is not designed to function like normal AV scanners and uses a new kind of scan engine that relies mostly on heuristics detection techniques rather than traditional threat signatures.  Malwarebytes is also designed to look in all the locations where malware is known to install itself/hide, so a full or custom scan shouldn't be necessary, especially on any sort of frequent basis (like daily), especially since the default Threat Scan/Quick Scan checks all loading points/startup locations, the registry, all running processes and threads in memory, along with all system folders, program folders and data folders as well as any installed browsers, caches and temp locations.  This also means that if a threat were active from a non-standard location, because Malwarebytes checks all threads and processes in memory, it should still be detected.  The only threat it *might* miss would be a dormant/inactive threat that is not actively running/installed on a secondary drive, however if the threat were executed then Malwarebytes should detect it.  Additionally, whenever a new location is discovered to be used by malware the Malwarebytes Research team adds that location dynamically to the outgoing database updates so the locations that are checked by the default Threat/Quick Scan in Malwarebytes can be changed on the fly by Research without requiring any engine or program version updates/upgrades.

1 hour ago, Envy14 said:

the (scan for rootkits) is turned on both scans.

It is recommend rootkit be turned on only where there is an issue for removing something with the normal scan. Rootkit is slightly more dangerous as it has to disable some whitelisting to remediate some rootkits.

Maybe once a week if really want to use rootkit. But honestly we rarely see rootkit files anymore and the newer engine can remove most of them anyways even without rootkit on.

[AdvancedSetup]

Hello @Envy14

Are you still having issues or have any concerns the computer may be infected?

Might be a good idea to get some logs if you do.

 

Please download Farbar Recovery Scan Tool and save it to your desktop.

Note: You need to run the version compatible with your system.
You can check here if you're not sure if your computer is 32-bit or 64-bit

• Double-click to run it. When the tool opens click Yes to disclaimer.
• Press the Scan button.
• It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your reply.
• The first time the tool is run, it also makes another log (Addition.txt). Please attach it to your reply as well.

Thank you

 

 

[Envy14]

22 hours ago, Porthos said:

Malwarebytes is not designed to function like normal AV scanners and uses a new kind of scan engine that relies mostly on heuristics detection techniques rather than traditional threat signatures.  Malwarebytes is also designed to look in all the locations where malware is known to install itself/hide, so a full or custom scan shouldn't be necessary, especially on any sort of frequent basis (like daily), especially since the default Threat Scan/Quick Scan checks all loading points/startup locations, the registry, all running processes and threads in memory, along with all system folders, program folders and data folders as well as any installed browsers, caches and temp locations.  This also means that if a threat were active from a non-standard location, because Malwarebytes checks all threads and processes in memory, it should still be detected.  The only threat it *might* miss would be a dormant/inactive threat that is not actively running/installed on a secondary drive, however if the threat were executed then Malwarebytes should detect it.  Additionally, whenever a new location is discovered to be used by malware the Malwarebytes Research team adds that location dynamically to the outgoing database updates so the locations that are checked by the default Threat/Quick Scan in Malwarebytes can be changed on the fly by Research without requiring any engine or program version updates/upgrades.

It is recommend rootkit be turned on only where there is an issue for removing something with the normal scan. Rootkit is slightly more dangerous as it has to disable some whitelisting to remediate some rootkits.

 

Maybe once a week if really want to use rootkit. But honestly we rarely see rootkit files anymore and the newer engine can remove most of them anyways even without rootkit on.

 

 

[Envy14]

Thank you so much for all these explanations, the custom scan finished within 27 hours.

[AdvancedSetup]

Yeah, that is a huge amount of time. Not sure how much data you have, but also note that once you've done a Full scan there is almost no need to ever do one again. We already keep track of all known locations where malware runs from and a regular Threat Scan checks those areas and completes for most people in under 5 minutes on newer computers and still under 15 minutes on older computers. If it's taking longer than that for a normal Threat Scan then best to let us take a look and see what's going on with your computer to see if it can be sped up or not.

 

[Envy14]

About the quick scan, it takes from 5 to 20 minutes depends on how much data on my devices, and about the custom (full) scan my devices have about 400 to 750 GB of data.

So I understand that a full scan is not that necessary and a quick scan is enough to do the job.

[Porthos]

4 hours ago, Envy14 said:

So I understand that a full scan is not that necessary and a quick scan is enough to do the job.

Yes...

[Envy14]

Thank you so much.