Avast Found a Threat in Mail folder

I suggest you use the program created by Etresoft, a frequent contributor. It will provide a snapshot of your system which we can analyze to possibly determine the cause of your problem. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

My first suggestion is to get rid of Avast. It is one of the worst pieces of scamware you can install on a Mac. Avast only causes problems and does nothing good for you.

Uninstall AVAST.

The brain-damaged approach all these third-party so-called Anti-Virus packages do is to scan every file on your Mac, and every file coming and going, looking for the fundamental instruction patterns from antique windows Viruses.

To justify their existence, they do so at a high enough priority to remind you they are working (disrupting your ability to meaningful other work). When completed, rather than letting up, they do it all again.

From time to time they might discover a pattern in a picture file, internal caches, preferences files, foreign-language text files, or other places where they can not possibly be a threat to your Mac. They put up an alarm regardless. It is always a false alarm.

In your case, finding a match for a Virus pattern in a Mac screen shot is NOT a threat to your Mac. Screen shots are not executable, they just may accidentally match a pattern.

Not satisfied with only the files on your Mac, it has come to light that many such packages mount an attack on your encrypted communications, to be sure they can see what is in going by there as well. Security Researchers recently reported that they do so in a far less than competent manner, leaving your encrypted communications compromised, and MORE vulnerable to attack.

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MacOS has built-in protections against arbitrary code getting into a position to be executable -- the only issue that really matters. Your Mac Boot drive can be full of the worst kind of Viruses, and they are not a threat to you, because they cannot become executable without your Admin password (and consent).

Don't listen to anyone whole says anything without citing a reputable source of their information. Avast may not be the best but it is one of the 60-70 anti virus companies trusted by VirusTotal.com which is a subsidiary of Alphabet (Google) who is definitely a lot more forward thinking in this regard than some other top tech companies I can think of.

To actually address your entirely legitimate concern....

What process is it referring to? Your screenshot is from iOS but examining processes is only typically possible on macOS (on a computer I mean).

The filename you gave may be the name of a file but its not the full path. For example, englishpaper.txt is a file name but /Users/Brandon/Desktop/englishpaper.txt is the path to where its actually located which is usually required unless you're doing a spotlight search for a filename.

If you use the Mail app just search the subject of the email or the name you gave and delete it. However if you opened the email or clicked any links then you may have infected your operating system which no one can help you confirm or deny and the only potential remedy that is most likely to work (with no promises or guarantees) is to reinstall the OS.

Anyone who tells you malware doesn't exist is not to be trusted or is simply not informed on how trivial various security measures like System Integrity Protection or code signing are to bypass. I'd gladly cite sources here but it'd likely seem as if I was promoting the topic and considering how specific I've been the curious can use their favorite search engine to research it.

Uninstall the garbage software that is hogging your computer resources and makes your Mac unstable and likely to crash, while it makes a Big Show about scanning and puts up nonsense False Alarms.

Its name is AVAST.