picoCTF like1000 Writeup

like1000 is a forensics puzzle worth 250 points.

The description for this puzzle is:

This .tar file got tarred a lot.

A tar file 1000.tar is supplied.

First, I tried to extract it using tar:

tar xvf 1000.tar

This produced a text file filler.txt which had some random junk in it, and another tar file 999.tar. Extracting this file created another filler.txt and another tar file 998.tar.

Seeing this, I assume based on the description that this puzzle involves extracting these files repeatedly.

I was able to solve this with a one-liner:

for x in $(seq 1000 |tac); do tar xvf $x.tar; done

This took a minute or two to extract all 1000 tar files, yielding flag.png:

flag.png

One thought on “picoCTF like1000 Writeup

  1. Pingback: picoCTF Writeups – DMFR SECURITY

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s