FinalCorruptZip

Description

BGR

FinalCorruptZip.zip

Solution

Oddly enough 7z is not able to open the above zip, but windows archive was able to?... NANIII

Anyway, the zip files always start with PK so header is corrupted.

FinalCorruptZip.png

Lookup Magic Bytes or List of file signatures

If you're using latest version of Hex Editor -> Select 41 (first byte) -> press Insert -> type 50 -> Save -> Unzip

FinalCorruptZip-1.png

└─$ unzip FinalCorruptZip.zip
└─$ file CorruptPNG.png
CorruptPNG.png: data

FinalCorruptZip-2.png

Edit first bytes as Signature indicates

FinalCorruptZip-3.png

FinalCorruptZip-4.png

To make life easier use OCR:

└─$ sudo apt install tesseract-ocr -y
└─$ tesseract CorruptPNG.png out
└─$ cat out.txt
SVBGR{m4g1C_B1t3s_yUmmmmm}

Flag: SVBGR{m4g1C_B1t3s_yUmmmmm}