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The post describes the issue quite well - MacOS seems to have accidentally created a file that contains fragments of malicious cryptocurrency miner which also happen to trigger one of our detections.
Avast for mac virus chest update#
UPDATE 1: It seems like Avast staff acknowledges the issue in this post on their forums:
Avast for mac virus chest full#
Hopefully the hash names of the files it regenerates after a full cleaning won’t accidentally match a known malware file again. So when you reboot, it sees it is missing and recreates it in /var/db/uuidtext/.Īs for what to do now? Well, you can either tolerate the Avast alerts or you can download a cache cleaning tool such as Onyx and just force the logs to be recreated by truly purging them from your system not just that one BC8EE8D09234D99DD8B85A99E46C64 file. So you delete the file in /var/db/uuidtext/, but all it is is a reference to what is in /var/db/diagnostics/. The second file path ( /var/db/uuidtext/) contains files that are references in the main *.tracev3 log files. Congratulations! Your Mac has magically created a filename that matches a known vector that has been primarily seen on Windows systems… But you are on a Mac and this filename is just a hash that is connected to the “Unified Logging” database system’s file structure and it is completely coincidental that it matches that malware filename and should not mean anything.Īnd the reason that specific file seems to regenerate is based on this detail from the above explanation: Just check out this reference for known Windows malware files that references that one specific hash. The second file path ( /var/db/uuidtext/) contains files that are references in the main *.tracev3 log files.īut in your case the “magic” seems to come from the hash: BC8EE8D09234D99DD8B85A99E46C64 This directory contains some other files as well including additional log *.tracev3 files and others that contain logging metadata.
These files are binary files that we’ll have to use a new utility on macOS to parse them. These files are named with a timestamp filename following the pattern 3. The first file path ( /var/db/diagnostics/) contains the log files. It’s most likely a false positive since /var/db/uuidtext/ is related to the new “Unified Logging” subsystem that was introduced in macOS Sierra (10.2).
Pretty sure there is no virus, malware or trojan at play and his is all a highly coincidental false positive. Therefore, a common virus removal forum isn't helpful in my situation, since I've already attempted to remove it with both Avast, malwarebytes, and manually. But Avast keeps labeling this as a potential “Cryptonight” virus and no one else online has posted anything about this issue. But I am unsure since I only have one MacBook and no one else that I know that has a mac has updated the OS to High Sierra. I suspect that this supposed “virus” is coming from the Apple update and that it is just a pre-installed file that is created and runs every time the OS is booted/rebooted.
Avast for mac virus chest how to#
So I have no clue where this has came from to be honest and I have no clue how to get rid of it. I checked all of my chrome extensions and nothing is out of order, I haven't downloaded anything special within the past week, besides the new Mac operating system (macOS High Sierra 10.13.1). My Avast runs full system scans every week, so this just recently became an issue this week. So if something is mining in the background, I can't tell at all. My CPU is running below 30%, my RAM is generally below 5GB (installed 16GB), and my network hasn't had any processes sending out/receiving large amount of data. I've been monitoring my CPU usage, Memory, and Network and I haven't seen a single odd process running.
I researched the file path and cryptonight and found out that cryptonight is/can be malicious code that can run in the background of someone's computer to mine cryptocurrency. I want to avoid wiping the laptop and re-installing everything, so that is why I am here. Therefore the virus is re-creating the file every restart of the laptop. So I decided to let Avast put it in the virus chest, restarted the laptop, and again the file was in the same location again. The file reappeared in the same location.
Avast for mac virus chest pro#
I found nothing, until I restarted my macbook pro today. So, after deleting the file I did several more full system scans to check to see if there were any more files. The file's location is : /private/var/db/uuidtext/7B/BC8EE8D09234D99DD8B85A99E46C64Īvast categorizes the infection file as : JS:Cryptonight
Avast for mac virus chest software#
Yesterday I ran a full system scan using my Avast antivirus software and it found a infection file.
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