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Flatpack-522.rar -

$ steghide extract -sf cover.png -p "" -xf hidden.txt (If steghide asks for a password, just press Enter – it’s not password protected.)

DECIMAL HEX DESCRIPTION 0 0x0 PNG image, 256 x 256, 8-bit/color RGBA, non-interlaced Extract the PNG: flatpack-522.rar

# 5. Decode QR code from extracted PNG FLAG=$(zbarimg _mystery.bin.extracted/00000000.png | awk -F: 'print $2') echo "✅ Flag: $FLAG" Running the script prints: $ steghide extract -sf cover

hidden.txt now contains:

#!/usr/bin/env bash set -e

$ unrar x -p522 flatpack-522.rar Result: – the archive opens, extracting a single file named inner.rar . 3.2 Confirmed Password The correct password is 522 (the numeric suffix of the archive’s name). (If you want a more systematic approach, you could also script a quick for i in 0..999; do unrar x -p$i ... && break; done loop.) 4. Analyzing inner.rar The newly extracted inner.rar is again a RAR5 archive, but this time it is not encrypted . (If you want a more systematic approach, you

$ steghide extract -sf cover.png -p "" -xf hidden.txt (If steghide asks for a password, just press Enter – it’s not password protected.)

DECIMAL HEX DESCRIPTION 0 0x0 PNG image, 256 x 256, 8-bit/color RGBA, non-interlaced Extract the PNG:

# 5. Decode QR code from extracted PNG FLAG=$(zbarimg _mystery.bin.extracted/00000000.png | awk -F: 'print $2') echo "✅ Flag: $FLAG" Running the script prints:

hidden.txt now contains:

#!/usr/bin/env bash set -e

$ unrar x -p522 flatpack-522.rar Result: – the archive opens, extracting a single file named inner.rar . 3.2 Confirmed Password The correct password is 522 (the numeric suffix of the archive’s name). (If you want a more systematic approach, you could also script a quick for i in 0..999; do unrar x -p$i ... && break; done loop.) 4. Analyzing inner.rar The newly extracted inner.rar is again a RAR5 archive, but this time it is not encrypted .