Feed It the Fracture
Challenge Name
Feed It the Fracture
- Category: Forensics (E)
- Author: Vignesh K S
Challenge Description
An audio file contains a hidden passcode. Once you unlock the vault, you’ll find a series of clues — morse code, ASCII, Base64 — leading to the final flag.
Solution
Initial Analysis
Started by listening to the audio file. The dialogue hinted at a number sequence. There was also a password-protected zip file named vault.zip.
- Morse Code Decoder
- ASCII to Text Converter
- Base64 Decoder
- Rentry.org
Step-by-Step Solution
Step 1: Decode the Passcode from Audio
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| The conversation hinted at the pincode 600127.
Removed the zeroes → got 6127.
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Used 6127 to unlock vault.zip.
Step 2: Solve the Morse Code
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| Found a morse code file inside the zip.
Decoded it to get a string.
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Step 3: Decode ASCII in the URL
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| Converted ASCII values to text.
Revealed a Base64 string.
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Step 4: Decode Base64
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| Decoded the Base64 string to get a URL.
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Step 5: Visit the URL
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| Opened the URL on rentry.org.
Found the final flag.
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Flag
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| CYS{INH4RM0N1C_DO0R_UNL0CK3D}
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Flag
CYS{INH4RM0N1C_DO0R_UNL0CK3D} 