A Basic Challenge

This is a nice and basic challenge

Files:

• basic_chall.txt

Solution

The text file contains space separated binary numbers. When converted to ascii, this yields a string of space separated hex values. On converting these hex values to ascii, a base64 encoded string is obtained. On decoding the base64 string, a set of numbers are obtained. On close observation, it is seen that each digit is less than 8 and hence the numbers are octal. When converted to decimal and then ascii, the flag is obtained.

Program

• solution.py

Flag

rgbCTF{c0ngr4ts_0n_b3ing_B4SIC}