Finish The Flag
30 points Easy

I received a strange letter in the mail, when I unfolded the document inside, I discovered this matrix bar code. Can you figure out what it contains?

letter.zip
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Reverse Engineering ยท 0x41777
321 solves
Rating 4.61
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Discussion

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y0g1ng

3 months ago

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Preaty easy in comparasion with R* chalenges

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Mr_Nil

6 months ago

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An interesting challenge

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Bittz

9 months ago

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this should be 10 pointer.. it is 30 points for free.. btw.. nice challenge.. some forensic challenge memories came back..

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RSKL

1 year ago

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Protected
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zero_cool

1 year ago

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Loved it!

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prizm

1 year ago

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Really, really, REALLY cool challenge to get into reving!

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sys41x4

1 year ago

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This was Easy as 10 pts, can easily be done with QR Decode + gdb only

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yusuf0x

1 year ago

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nice

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lnarolski

2 years ago

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Watch out for smartphone qr code scanners - like to cut out strings ;)

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kennyox

2 years ago

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Hi all, is there anyone who could give some hints? I have an elf executable file now, and I don't know what to do next.

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TheNiv

2 years ago

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Do a static analysis of the file. Disassemble and try to understand how it works and what it contains. You can also look at its headers, strings etc..

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Thorse

11 months ago

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How did you get elf executable file? Thank you

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gtpcctf

10 months ago

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The QR code may help a bit here. The question to ask is - "How to convert a binary file into a string?"

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Thorse

10 months ago

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gtpcctf

10 months ago

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Thorse

10 months ago

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Excuse me!. I can't watch

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gtpcctf

10 months ago

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You might be saving the decoded binary data as ASCII-HEX file. Use CyberChef(https://gchq.github.io/CyberChef/ ) to decode Base64 and then download(save icon on output window) the file as binary.

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