Could you provide more on where you encountered this file or what it is supposed to contain?
There is no public information or recognized technical documentation available regarding a file named . hmck.rar
If you have this file, you can check its safety by uploading it to a multi-engine scanner like VirusTotal to see if it has been previously analyzed by the security community. Could you provide more on where you encountered
: Compressed payloads used in phishing or targeted attacks. hmck.rar