https://wikileaks.org/ciav7p1/cms/page_31522827.html
ARCHITECTURE
Client (Tabulators??) "The component that resides on a target and does things. Communicates with a (paired) Listener."
Listener (Communicates with multiple tabulators and manager??) "The component that communicates with multiple (paired) Clients and the Manager. The Listener functions mainly as a "translator" for messages/commands between the Manager and a given client."
Manager (Communicates with listener and data stores??) "The component that communicates with the Listener, User Interface (UI), and data store(s) (e.g., database). The Manager is responsible for noting the commands of a user and tasking/managing collections of clients via associated Listeners so that a user can achieve desired goals."
Unrelated. Just a same name based on a German monster.
It's a Trojan or more commonly know as a RAT(remote access tool). It's similar to what pc tech legitimately use on say windows when you remotely access a pc so you can fix things on it except this one runs in background and nobody is meant to know it's running i.e the victim or owner of the pc .
So you can steal files remotely on a pc without anybody knowing.
The text you've posted is like an introductory Computer Science level breakdown of a networked program. It's the sort of thing you'd write if you wanted to present something to a group of lay people, but want to sound just over the thresh hold of too technical for them to understand.
It's a variant of the old, "if you can't dazzle them with brilliance, baffle them with bullshit". It sounds very in-depth and technical, but it's really just jargon that isn't saying much more than how a server talks to a client via a webpage.
Their git repo is called KRAK. I'm guess kraken is some sort of password cracking software.