delay on detect new malware

Hi ,

i find a malware ( ransomware ).

scan with my webroot, can not detected .

Then upload on virustotal and show 50 AV can detected it .

then more than 10 times scan with webroot . but not Effective.

i upload file for webroot and submit ticket for webroot support.

after 7 hours , webroot team answer me and blocked malware.

* Why my webroot can not automatically analyze malware " Suspicious file " ?!

* why webroot answer me and blocked malware after long time " 7 hours " ?

Regards ,

Amir

Durantash