QakBot (also known as QBot) is one of the most active banking Trojans in the world, which later transformed into a modular multipurpose botnet.
The main functionality is the theft of credentials to log in to financial services: interception of usernames and passwords (keylogging, web injections), cookies. The most recent versions of the Trojan have received email theft functionality to conduct BEC attacks and increase the likelihood of compromising systems.
In addition, the QakBot botnet is used as a means of delivering other malicious computer programs, in particular, TrickBot and Emotet.
It was first discovered in 2007.