Clear it in 3 steps
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Start the environment
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Investigate the target
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Submit the flag
Files contain identification information called "magic bytes" at the beginning. Even if the extension is disguised, you can identify the true file type by examining magic bytes. In this challenge, use the file and xxd commands to identify disguised files!
Use the file command to check the file type
Is secret.png really an image file?
Use the cat command to view the contents of secret.png