Mac OS "Application "Flash Player" is trying to install new supporting program"

Question

Hello. During an update installation on my Mac (MacOS Sierra 10.12.6) I got the following message: "Application "Install Adobe Flash Player" is trying to install new supporting program", and the prompt is asking to fill root password. I don't remember that flash player previously asked me to fill a password, and it looks a bit suspicious to me. Does anybody know what is "supporting" program? And should it be or it is kind of infection? (BTW, Antivirus and Malwarebytes haven't detected anything).

_maria_ · Answer

That doesn't sound familiar to me. What is the name of the installer file you are using?

Please post a screenshot of the installer dialog window (see https://forums.adobe.com/docs/DOC-7043#jive_content_id_How_do_I_attach_a_screenshot)

Please do the following:

Launch Finder and navigate to /Applications/Utilities
Open the program named Terminal.app
Double-click on the Installer.DMG file you downloaded.
A new window should display, showing the DMG package contents, e.g:
Go back to the Terminal app and type: codesign -vvd
Then drag the installer .APP file onto the Terminal window
You should end up with the following in the Terminal window:
Click the ENTER key
Post a screenshot of the Terminal Window displaying the results

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