There are numerous advanced kinds of spyware used by intelligence firms. A few of these include keyloggers, which record every keystroke made by a user; remote access tools, which allow an aggressor to get control of a victim's maker; and malware that is created to take sensitive information or passwords.
One particularly advanced type of spyware is referred to as a rootkit. Rootkits are created to conceal themselves from detection, and can be extremely tough to get rid of once they have been installed on a system. They are often utilized to offer an opponent complete control of a victim's device, enabling them to spy on the user, and even take control of the maker from another location.
see this page Another advanced type of spyware is called a botnet. A botnet is a network of contaminated computers that can be controlled from another location by an aggressor. Botnets can be used to launch dispersed rejection of service (DDoS) attacks, or to send out spam and phishing e-mails. They can also be used to spy on users, or to steal delicate information.
Spyware is ending up being significantly advanced, and intelligence firms are continuously developing their methods and tools to stay up to date with the most recent risks.