The name you mentioned is very similar to Wacatac (or Watacat ), a common family of trojans that Windows Defender often flags. These trojans are known for: Stealing passwords and banking info. Setting up Remote Access (RATs) to control your PC.
While there isn't a single famous "Watsica.rar" paper, researchers frequently use archives like this to deliver "Wacatac" trojans by exploiting known WinRAR vulnerabilities. Watsica.rar
It is worth noting that Windows Defender sometimes triggers a "Wacatac" alert on benign RAR files simply because it can't scan deep enough into the compressed layers. Recommended Tools for Investigation The name you mentioned is very similar to