This false alarm issue is caused by Microsoft Defender's signature. However, as of this writing, there has not been any further details shared by Microsoft.
This issue can be resolved by performing Signature Update on Microsoft Defender.
Version: 1.321.557.0
Engine Version: 1.1.17300.4
Platform Version: 4.18.2006.10
Released: 8/4/2020 1:53:58 AM
Source: Refer to the Microsoft article, Security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware