Offline verify malware through VirusTotal besides using YARA.

 1) Open a CMD, go to the suspicious sample's folder, and type:

> certutil -hashfile suspicious_file.exe MD5

> certutil -hashfile suspicious_file.exe SHA256

2) Record the hashes shown in the output of those two commands above.

3) Open a web browser, go to https://www.virustotal.com/gui/home/search, and search the above-mentioned hashes.