Yes.
There are ways to detect memory manipulation. Even if the cheat is 'new'. Memory manipulation = memory manipulation.
There is no difference in between your friends 'new cheat' and Cheat Engine
A friend recently found a memory editor that can put DM Ultra / Dark Aether on MW guns. The memory editor is new and the person that made it says it'll fly under the radar since the game's anti-cheat hasn't detected it yet since it's new.
Can I get banned for using this memory editor and putting Dark Aether on my MW guns?
Yes.
There are ways to detect memory manipulation. Even if the cheat is 'new'. Memory manipulation = memory manipulation.
There is no difference in between your friends 'new cheat' and Cheat Engine