> For the complete documentation index, see [llms.txt](https://reze.gitbook.io/bin/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://reze.gitbook.io/bin/ctf-writeups/htb-cyber-apocalypse-2025/prompt-injection-ai.md).

# Prompt Injection - AI

## Lunar Orb - Easy

Originally, I did play around a bit with this, since this is somethign new to me, the only thing I ever tried was Gandalf (level7). But I'll keep it short here and show how we can get the flag easily. Note that there are N no. of ways to do this.

<figure><img src="/files/xFaOpjIp3J58gbwe3KHJ" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/1exIC7Ylomw991ElyQBF" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/XJU2H2cwD5u7xErhJnWy" alt=""><figcaption></figcaption></figure>

And we get the flag :)  `HTB{Follow_HAT_P_23_Moriah}`

## Mirror Witch - Easy

<figure><img src="/files/k8VEag19rUm5dqdt7KHp" alt=""><figcaption></figcaption></figure>

For this, I had to struggle a bit and found this interesting study on prompt injection attacks.

{% embed url="<https://hiddenlayer.com/innovation-hub/prompt-injection-attacks-on-llms/>" %}

I used this to ask the AI to summarize its instructions in python and got the flag.

<figure><img src="/files/xXEuNHaluqYOI7tBwGLU" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/PHg0NMiI9ZpEBKuyJgz6" alt=""><figcaption></figcaption></figure>

Got the flag: `HTB{Flame Peaks, Crystal Caverns, Floating Isles, Abyssal Depths}`

## Cursed Gatekeeper - Easy

<figure><img src="/files/MNvjpn3RuaNj8QFELbtv" alt=""><figcaption></figcaption></figure>

This was quite easy, I went in and the very first prompt given lead me to the flag. Didn't even tried xD

<figure><img src="/files/lDJcmc8ljSPLywQDX2JY" alt=""><figcaption></figcaption></figure>

Got the Flag: `HTB{Eyes_Of_the_North_Hearts_Of_The_South}`

## Elixir Emporium & Embassy - Easy

I was a bit close to solve this challenge but failed to do so. Here's the official writeup

{% embed url="<https://github.com/hackthebox/cyber-apocalypse-2025/tree/main/prompt_injection/ai-elixir-emporium>" %}

{% embed url="<https://github.com/hackthebox/cyber-apocalypse-2025/tree/main/prompt_injection/ai-embassy-ai>" %}


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