Parade_buster-final.7z May 2026

The first file contained the start of the PNG, while the last file ( part2_375.7z ) contained the .

The offset for the hidden PNG data could be calculated by comparing the reported "Packed Size" from the 7z -slt l command with the actual file structure. Parade_Buster-Final.7z

: Opening the first archive ( part2_0.7z ) in a hex editor revealed a PNG header ( 89 50 4E 47 ) and an IHDR chunk buried within the file structure itself, rather than in the extracted contents. The Pattern : The first file contained the start of the

The file Parade_Buster-Final.7z was the concluding challenge in the series from TastelessCTF 2020 . This write-up details the process of identifying a hidden PNG file embedded across hundreds of separate archives. Challenge Overview The Pattern : The file Parade_Buster-Final

: Standard extraction and concatenation of the junk files failed to yield a valid binary.

The PNG file was striped and hidden in the trailing bytes of the 7z archives, just before the footer.