Internal Scan, 1 SuspiciousThreatType

Severity: enSuspiciousThreatType
File: wp-admin/.rnd
File signature: 03cb682bd612401b1b09f8993b3f910b
Threat signature: 03cb682bd612401b1b09f8993b3f910b
Threat name: Heur.AlienFile.gen
Threat: Unknown file in core
Details: Detected unknown file in core directory

I did notice on another forum that perhaps having UpdraftPlus enabled could cause this issue.

Can you verify and/or help me resolve?

Thank you.