Web Anti-Virus "download allowed" .js file !!!!!

[adriano_liti]

i had the Web anti-Virus setting :

Action on threat detection : "Notify"

and then my Firefox download a .js file according to the KIS reports.

Event: Download allowed
User: me
User type: Active user
Application name: firefox.exe
Application path: C:\Program Files\Mozilla Firefox
Component: Web Anti-Virus
Result description: Allowed
Type: Probability of unauthorized software download
Name: https://appcdn01 . xyz/vast . js
Threat level: Medium
Object type: Web page
Object name: vast.js
Object path: https://appcdn01 . xyz
Reason: Cloud Protection

Then i changed the setting to:

Action on threat detection : "Perform action automatically"

Then visit same web site (or ad website) this time KIS blocked the download:

Event: Download denied
User: me
User type: Active user
Application name: firefox.exe
Application path: C:\Program Files\Mozilla Firefox
Component: Web Anti-Virus
Result description: Blocked
Type: Probability of unauthorized software download
Name: https://appcdn01 . xyz/vast . js
Threat level: High
Object type: Web page
Object name: vast.js
Object path:https://appcdn01 . xyz

 

I ran a full scan on highest sensitivity. Nothing found.

it was vast.js file. Is it possible that this java script file is now executed and running hidden on my system?

Any suggestion?

 

[harlan4096]

Welcome to Kaspersky Community.

 

https://www.virustotal.com/gui/url/52c1c186eeff18583093027630893a82d91db057f15091cf7f0b44f1471a2a12?nocache=1

 

https://opentip.kaspersky.com/https%3A%2F%2Fappcdn01.xyz%2Fvast.js/?tab=lookup

 

[adriano_liti]

thanks.

i know that it is adware or malware, but its now downloaded at least one or two time by firefox.

it is on KIS Web anti-virus report.

how can i assure, that this downloaded js file is not on my pc anymore?

how can i assure that its deleted ?

[harlan4096]

1st time the report says "Allowed", as You set WebAV only yo Notify, but probably once the file got Your local system, probably was detected by FileAV, You should check reports and Quarantine for that date.

 

If nothing found after Full Scan, then that file seems not in Your system, anyway You may manually scan FireFox cache folder.