chekin

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L3HCTF{w3LC0m3_70_L3Hc7F}

RAWaterMark

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import rawpy

raw = rawpy.imread(r"image.ARW")
data = ''.join(map(str, list(raw.raw_image_visible[0] % 2)))

out = b''
for i in range(0, len(data), 8):
    out += int(data[i:i + 8], 2).to_bytes(1, byteorder='big')

with open('out.zip','wb') as f:
    f.write(out)