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* LabyREnth Capture the Fla...

# LabyREnth Capture the Flag (CTF) Hints

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By [Richard Wartell](https://www.paloaltonetworks.com/blog/author/richard-wartell/?ts=markdown "Posts by Richard Wartell")  
Aug 11, 2016  
2 minutes  
[Events](https://www.paloaltonetworks.com/blog/category/events/?ts=markdown)  
[CTF](https://www.paloaltonetworks.com/blog/tag/ctf/?ts=markdown)  
[LabyREnth](https://www.paloaltonetworks.com/blog/tag/labyrenth/?ts=markdown)  
[Unit 42](https://www.paloaltonetworks.com/blog/tag/unit-42/?ts=markdown)

[](https://www.paloaltonetworks.com/blog/wp-content/uploads/2016/06/Unit-42-CTF-1.png)  
[![Unit 42 CTF 1](https://www.paloaltonetworks.com/blog/wp-content/uploads/2016/06/Unit-42-CTF-1-500x216.png)](https://www.paloaltonetworks.com/blog/wp-content/uploads/2016/06/Unit-42-CTF-1.png)

The [LabyREnth](http://labyrenth.com/) capture the flag challenge is only open for four more days, but you still have a chance to participate. To help you get started, or move on to the next challenge, our threat research team put together a number of (sometimes cryptic) hints. Whether you've been stuck on a challenge and want to move on to the next one, or want to jump in during the final stretch, look no further:

### Windows 1:

Watch out for those debugging checks, these XORs aren't too hard...

### Windows 4:

Try harder, with a vengeance! ... Or a napkin! ... Or a brute forcer!

### Unix 1:

How many levels deep does it go?!?! I'd say script it, or maybe bash one liner if you're extra cool...

### Unix 2:

The Program only does one thing, HTTP request and print. Figure out how that HTTP request works...

### Docs 1:

Use the URL for hints on how to decode part of the URL this naughty macro attempts to download from. Could be base64 and XOR 😉

### Docs 4:

[](https://www.paloaltonetworks.com/blog/wp-content/uploads/2016/08/LabyREnth-Hints-1.png)  
[![LabyREnth Hints 1](https://www.paloaltonetworks.com/blog/wp-content/uploads/2016/08/LabyREnth-Hints-1-500x405.png)](https://www.paloaltonetworks.com/blog/wp-content/uploads/2016/08/LabyREnth-Hints-1.png)

### Mobile 1:

That seems like a lot of bytes for a call...what do you think RDX?

### Mobile 3:

Decompile -\> Find -\> Replace -\> Profit

### Threat 1:

sed -e 's/\\\&L4bry1nth\_.\*\\?//g'

### Threat 2:

AAAAAAAAAAA!!!! Compression AAAAAAAAAAA!!!!

### Random 1:

Give that environment variable a drink!

### Random 3:

Step 1: SYN packet sequence numbers; Step 2: Embedded ZIP; Step 3: Profit!

*** ** * ** ***

## Related Blogs

### [Events](https://www.paloaltonetworks.com/blog/category/events/?ts=markdown), [Unit 42](https://www.paloaltonetworks.com/blog/category/unit42/?ts=markdown)

[#### LabyREnth CTF 2017: Check Out the Prizes](https://www2.paloaltonetworks.com/blog/2017/09/unit42-labyrenth-ctf-2017-check-out-the-prizes/)

### [Events](https://www.paloaltonetworks.com/blog/category/events/?ts=markdown), [Unit 42](https://www.paloaltonetworks.com/blog/category/unit42/?ts=markdown)

[#### LabyREnth CTF 2017 Winners!](https://www2.paloaltonetworks.com/blog/2017/08/unit42-labyrenth-ctf-2017-winners/)

### [Events](https://www.paloaltonetworks.com/blog/category/events/?ts=markdown), [Unit 42](https://www.paloaltonetworks.com/blog/category/unit42/?ts=markdown)

[#### LabyREnth CTF 2017 Final Week: Beat the Maze!](https://www2.paloaltonetworks.com/blog/2017/07/unit42-labyrenth-ctf-2017-final-week-beat-maze/)

### [Events](https://www.paloaltonetworks.com/blog/category/events/?ts=markdown), [Unit 42](https://www.paloaltonetworks.com/blog/category/unit42/?ts=markdown)

[#### VIDEO: Tips, Tricks, and Clues to Escape the LabyREnth CTF](https://www2.paloaltonetworks.com/blog/2017/06/unit42-video-tips-tricks-clues-escape-labyrenth-ctf/)

### [Events](https://www.paloaltonetworks.com/blog/category/events/?ts=markdown), [Unit 42](https://www.paloaltonetworks.com/blog/category/unit42/?ts=markdown)

[#### LabyREnth CTF 2017 Launch Day: The Challenge Starts Now!](https://www2.paloaltonetworks.com/blog/2017/06/unit42-labyrenth-ctf-2017-launch-day-challenge-starts-now/)

### [Events](https://www.paloaltonetworks.com/blog/category/events/?ts=markdown), [Unit 42](https://www.paloaltonetworks.com/blog/category/unit42/?ts=markdown)

[#### LabyREnth CTF 2017: One Week Countdown](https://www2.paloaltonetworks.com/blog/2017/06/unit42-labyrenth-ctf-2017-one-week-countdown/)

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