Question about kind of aimbot hack

Hey, sometimes i see some hackers in the game that use some kind of aimbot or something, they can aim at me right away and shoot. i mean sometimes i can hide and they wouldn't notice me but if they come close enough their gun will be automatic aimed on me like a magnet..
i'm just curious what is this hack?

Wall hack + triggerbot + aimbot with customize hotkey or just a good player with good reaction and good hand-eye coordination

Moved to the right section

They'd be able to see you through the walls with ESP (draws a box around all players) or UAV, in general, some type of wall hack (as there are more). The "magnet aim" is called aimbot. You can customize aimbot and let it be as obvious as you want it by using some setting like targeting all players in 360 degrees and having an aim speed around 1000, making it as soon as they are visible (even if they're behind you), you will snap on to the enemy.