joy 200

azrael — Thu, 03 Apr 2014 16:23:37 +0000

Category:

Event:

Volga CTF Quals 2014

Japanese task description, input file name "japcross.txt" and its content clearly showed us that we need to solve a japanese crossword.

Like a true programmer I found japanese crosswords solver with command line interface :)

Here are simple steps to get the flag:

Convert crossword to solver input format (see jc.txt);
Run solver and get result (see jc.png);
Easy to understand that it's QR-code. Because I'm a web applications developer I wrote the simple python html generator (qr-make.py) which created page 1.html to me;
And finally read QR-code in any way.

Flag is longing for you drove me through the stars. Alexei Tolstoy.

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Attachments:

joy200.zip

joy 500

azrael — Thu, 03 Apr 2014 12:41:49 +0000

Category:

misc

Event:

Volga CTF Quals 2014

We have the photo and need to find a house address where this photo was made.

The original file had PSD extension but it was JPEG image. At first let's look at photo and highlight points of interest.

a church;
house number (199); [see zoomed piece below]
shadow of house.

So let's look at this clues. Name of the photo "the+monument+rocket" referring to Monument of Soyuz rocket and fact that organizers from Samara convinced us that there is Samara on photo.

1) We found the church with Google Maps after looking through all churches in Samara.

2) We can see a house 199 from our place. Zoomed house number:

3) We can see that morning now. Shadows shows us that East in front of us and slightly to the left.

So we need to find a house on the north-north-west from the church and with house 199 between it and church. In other words something like this:

We found this house after a few minutes. Flag is KarlaMarksa192.

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BalalaikaCr3w - Volga CTF Quals 2014

joy 200

joy 500