Atdmt is an unwanted and unwelcome tracking cookie that allows malicious websites to access your browser activity. Atdmt is installed onto the system due to gambling and adult-related websites. The Atdmt cookies can allow third party websites to analyze browsing behavior. Atdmt is developed and operated by Atdmt.com and typically installs itself on a PC without a user's knowledge or consent. If not intentionally installed, remove Atdmt from your system upon detection.