A hack job

Who do you think can hack into Justice league watchtower or SHEILD steal some files and leave without a trace.

@knighthood

With a computer.

I think Batman could if he uses the supercomputer in the batcave.

Sage.

Nightcrawler. Ghost.

Oracle

i dont think anyone could do it and leave absolutely no trace at all

Lex Luthor, Brainiac, Reed Richards, Tony Stark, Batman, maybe Tim Drake, Doctor Doom, Hank Mccoy. I could probably go on.

Lex Luthor did exactly that in the animated series (not sure if that's where you got the idea).