Lost Some Binary

V1t CTF 2025StegoWriteup by @xabito

SOS we lost some binary sir!

Attachments

Recon

If we convert each 8-bit sequence from the file to its corresponding ASCII character, we obtain:

Hiii man,how r u ?Is it :))))Rawr-^^[]  LSB{><}!LSB~~LSB~~---v1t  {135900_13370}

The presence of multiple LSB markers within the message suggests that we should perform Least Significant Bit extraction. Additionally, the challenge title itself references LSB, further reinforcing this hint.

Flag capture

To solve this challenge, we need to extract the least significant bit from every 8-bit group in the provided binary data and use those bits to reconstruct the flag as ASCII text. A convenient way to perform this operation is by using this CyberChef recipe.

Flag: v1t{LSB:>}