BelkaCTF #7: Stranger Dfings

BelkaCTF #7 is over, and the Earth is safe from the extraterrestrial perpetrators (for now!). Thank you for playing, we hope you enjoyed it! Congratulations to the winners:
Student track: LEEJINUNG, k3vg3n, d1v1ne
Professional track: br1g, its5Q, Flip

đź“„ BelkaCTF #7: Stranger Dfings write-up

—Chief, I’ve got no clue how we’re supposed to track this guy down. Following the money? I don’t even know where to start.

—The card. I need the last four digits of his bank card. And while you’re at it, get me the bank’s phone number too.

I blinked.—You’re going to... call them? Just like that?

The Chief finally looked up, his expression suggesting I’d asked the dumbest question in forensic history.

—No, I’m going to send them a carrier pigeon. Of course I’m calling them! But I need those digits first. They won’t even talk to me unless I know which card to wave in their face.

Tricky
181
Banking
Solved 107 times

What are the last 4 digits of the suspect’s bank card, and the contact phone number of his bank?
For example: *1337, +1234567890123

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