Malware Warning Popup won't go away

You will not find a file with that name on your Mac, and things like "Malwarebytes" won't help either.

Please read About those "<app> will damage your computer" messages - Apple Community.

none of what you’ve posted matches the usual zillions-of-startup plists junk.

Do you have a DragonDrop app installed somewhere?

Try a Spotlight search for it.

That was an app available around a decade or so ago.

Launch Terminal app, cut-and-paste the following (harmless) find command into the session, and press return:

find / -iname "DragonDrop"

That command will chatter (potentially a whole lot) about inaccessible files and such (ignore that), will (slowly) search the entire storage system, and will (eventually) find anything with a matching filename.

Another option is to install EtreCheck, and see if that can find any trace of the startup.

John Galt wrote:

You will not find a file with that name on your Mac, and things like "Malwarebytes" won't help either.

The three screenshots of the traditional launchd directories are posted above, with nothing remarkable (to me).

There are other ways for apps to persist and to launch in macOS too, not the least of which is from within some app bundle via SMappService/BundleProgram (though that only works with notarization).

DragonDrop was an app around a decade ago, and can be far enough back to not be notarized.

John Galt wrote:

I'm not seeing those screenshots, but I'm using an iPhone.

Yeah; tap on More and you'll get the posting text and most of the first image, and no more.

Switch from portrait to landscape and back to portrait mode, and see if that now reveals the other images for you.

(That P-to-L-to-P rotation reveals the images here, when testing on an iPhone.)

Seems an ASC bug, and have now forwarded a screen video reproducer along to our hosts.

I'm not seeing those screenshots, but I'm using an iPhone.

👍

Had to do that a couple of times before it worked.

Anyway EtreCheck would be the next step.