A content/posts/gcode.md

@@ -0,0 +1,26 @@ 
++++
+title = "CTF Write Up: Serendipity Edition"
+date = 2026-01-22
++++
+
+MetaCTF was the event, rather short we only had 3 hours. 
+I managed to not to fumble the apportioned iota of time, here's the result.
+I did a forensics problem, the prompt was minimal, they us a .g file and a silly pun.
+
+## What to do with that Weird, Quirky, Bodacious File?
+
+Upon seeing this unfamiliar file extension I did whats natural and googled it.
+The first answer I got was "BRL-CAD geometry file", so in turn I tried to download "BRL-CAD" to
+open this file. 
+This might have been a good idea but the damn program crashed on startup and I didn't have enough time to
+troubleshoot this bullshit (its a 3 hour CTF remember).
+ 
+Now for new approach, the prompt was very fixated on the letter G so my mind came to g-code,
+a language used to command CNC machines and 3D printers.
+I opened Orca Slicer to see what I could do with the file.
+Orca Slicer is a 3D printing slicer which is a type of software that converts your nice 3D models into
+g-code, hence me using it.
+Here is where the serendipity manifests itself, first option I saw was to convert an binary g-code file into ascii.
+When I did that I found a series of comments (didn't know that g-code had comments) that spelled out the flag.
+ 
+