picoCTF – Wave a Flag

Introduction

Question: Can you invoke help flags for a tool or binary? This program has extraordinarily helpful information…

Files: warm

Overview & Solving

Approach: After downloading the file running the command

file warm

shows it as an executable file.

When we try to run using

./warm

It gives error. One of the reason might be that it does not have execution permission. To give permission enter

chmod +x warm

running again gives

Hello user! Pass me a -h to learn what I can do!

Finally running

./warm -h

returns the flag

Flag: picoCTF{b1scu1ts_4nd_gr4vy_6635aa47}

Another unconventional method involves utilizing the ‘strings’ command to extract all text strings from a file.

Next, these strings can be saved into a text file. Following this, the ‘gedit’ find option can be employed to search for the flag using the filter string ‘picoCTF{‘ since flags consistently commence with this sequence.

Thinking outside the box can occasionally streamline processes, yet success isn’t guaranteed in every instance.

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