Virus warning in Bitcoin [cash] ABC client?
Yes, that's very usual and expected. 

It is not surprising to have Bitcoin-related code in Bitcoin Core(-forks), but the malware analyzers don't understand the purpose of Bitcoin code.

Here's a real software with a Bitcoin miner (utorrent 3.4.2): https://www.virustotal.com/#/file/0e7e8526e8c4ab3c3dc938b1bb042bda07f464390a919c7f3f30caadec156549/detection

The same happens for Bitcoin Core: