The SpaceStation.jpg contains the encrypted flag in the file flag.enc. The flag is encrypted using openssl and the AES algorithm. The iv and key used for the openssl encryption command are opcodes in an executable named Bangalore that is also hidden in SpaceStation.jpg.
You will need to know just a little bit about crypto, executable file formats and assembler to solve this challenge... objdump is your friend :-)
Needed info is provided in the embedded readme file.
Discussion
Thanks!
easiest -d -j .data Bangalore
i can't i've tried everything
i cant find the .data !!!!! i found the key but the iv is still cant find it, any help ?
edited:
after a day, i found the .data and the .text
tried to openssl it and still bad decrypt
objdump -d -j .data may help
CTFlearn{A11_Y0ur_Ba5e_Are_Bel0ng_T0_Us}
bruh
Thanks!
For future solvers: You need to learn more about AES 256 and do some exercises to solve this challenge. It's very nice challenge :)
Thanks!
easiest -d -j .data Bangalore
i can't i've tried everything
i cant find the .data !!!!! i found the key but the iv is still cant find it, any help ?
edited:
after a day, i found the .data and the .text
tried to openssl it and still bad decrypt
objdump -d -j .data may help
1 month ago
For future solvers: You need to learn more about AES 256 and do some exercises to solve this challenge. It's very nice challenge :)