I received an e-mail from a Windows friend with a video of a german Shephard doing an obstacle course. Above my friend's header was B1awya73. I asked him if he had 2 e-mail addresses, no. So I tried Reply and Forward, would not go. I took a picture of desk top and new e=mailed him to show him. At the bottom of his letter was a Free Animation of a monkey from IncrediMail.com, so I went there. A question asked was is this a malware, the answer was yes, a Trojan. Using Spotlight, up came the locations of the videos, gifs and e=mails showing b1awya73 on my hard drive. Going into my contacts the first time I had under D -dan on a smart card. I deleted that. I told my friend to get Malwarebytes, he did, 500 problems, but all cleaned out. He e-mailed me back and we both scanned each other. Clear. But, the Dog video was at the bottom of his pics. My contacts had a new name under D, Dispatch, so I again cleaned it out. All Malware byte scans show zero problems. When I started eliminating the last letters of b1awya73, at the b1aw level, all sorts of stuff appeared, like videos, music, and files. What is this b1awya73? Using spotlight gives an all clear result as well. I have a 2012 iMac , version 10.14.6.
Thanks.