A: It's a 3DCG adult animated film primarily focusing on fantasy elements (elves, succubi) with a heavy M (masochistic) and domination theme.

Running it:

Attached was a single file named The file’s size was minuscule—just 4 KB—but its hash was unlike anything Sakubasu had ever seen. Intrigued, he opened a sandboxed environment and began to dissect the binary.

In independent Japanese subcultures, (a phonetic adaptation of the English word Succubus ) is a highly popular fantasy character archetype.

The program prints “Correct!” and then displays the flag (which, in this challenge, is the same string). Some variants of the challenge hide the flag behind an extra transformation (e.g., XOR with a constant). In this binary no such transformation exists.

def extract_flag(binary): # Get the address of the secret table (look for the string "Incorrect!" first) strings = subprocess.check_output(['strings', '-t', 'd', binary]).decode() inc_addr = None for line in strings.splitlines(): if "Incorrect!" in line: inc_addr = int(line.split()[0]) break if not inc_addr: raise RuntimeError("Could not find reference string.")

Summary