That was the real 7Launcher. It was a repackaged malware dropper.
I ran the latest official 7Launcher APK (v2.5.6 as of this writing) through , which uses 60+ antivirus engines. The result: 7launcher safe
It is from a major developer like Microsoft (Launcher), Nova, or Niagara. It is often found on Google Play Store , but also on third-party APK mirrors like APKPure and APKMirror. That was the real 7Launcher