I found it in the category of promotional cookies listed by some commercial websites:
Name:CID
Purpose:Used by Adriver to deliver targeted ads to a user based on their browsing habits
Provider:.us.ck-ie.com
Service:Adriver View Service Privacy Policy
Country:United States
Type:server_cookie
Expires in:7 day
This cookie is used for gathering data on how visitors use the website.
Adriver is a Russian operator of an Internet advertising management and control system.
I found an article that deals with this service provider and others, visit this page:
https://adalytics.io/blog/adtech-not-checking-user-tcf-consent
Look for the article "Belgian user visits euronews.com". You get a nice little chain of how websites synchronise cookies with a number of third party data brokers and ad tech providers without the user's permission.
Had the SSL certificate used by the us.ck-ie.com web server not been revoked, and had ESET not alerted us, we would not have noticed the illegal data exchange going on in the background without the user's knowledge.
soctech received kudos from Aryeh Goretsky in Endpont device alarm
