> For the complete documentation index, see [llms.txt](https://blog.ycfteam.in/yctf-weekly/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://blog.ycfteam.in/yctf-weekly/writeups/yctf0x02.md).

# 🚩YCTF0x02

## 1. Easy

**Category:** Reverse Engineering

**Description:** Dude, It's an easy challenge.

**Challenge file: \<link>**

**Credit:** [**Munazir**](https://blog.ycfteam.in/yctf-weekly/)

Solution: Executing the binary on linux asks for the password.

<figure><img src="/files/PYpScKt56pYCn9LkpjOh" alt=""><figcaption></figcaption></figure>

Now, use strings to get the exact matching pattern for passphrase.

<figure><img src="/files/7SnXWW5F0qa3EySMgPfJ" alt=""><figcaption></figcaption></figure>

We got some strange string `4/*A1zqi!*9` before the Passphrase, let's try to enter the string when asked for the password.

<figure><img src="/files/2qTQ1abm3qPCwlfrctBA" alt=""><figcaption></figcaption></figure>

After we enter the passphrase, we get something in HEX format.&#x20;

`594354467b336173795f7233765f643065736e315f723371753172335f627261316e7d`

Pasting on cyberchef, we get the actual flag.

<figure><img src="/files/9zg5nqXbmDF4FjShx6RA" alt=""><figcaption></figcaption></figure>

## 2. Never found

**Category:** Miscellaneus

**Description:** My friend is spying on our ycfteam website. But the page he was trying to access was never found later.

**Link:** [**https://ycfteam.in**](https://ycfteam.in)

**Credit:** [**Munazir**](https://blog.ycfteam.in/yctf-weekly/)

**Hint:**&#x20;

**Solution: Understand the challenge name and description, what does it say?**&#x20;

**`Never found` Which indicated/ similar to Not found. searching the Archive web for the 404 not found page on `https://ycfteam.in/404`,**&#x20;

<figure><img src="/files/cyHO4pcNJgLnVRFpQqhn" alt=""><figcaption></figcaption></figure>

**We get the flag!**

<figure><img src="/files/Xr5UzzMhDAZ04y6N9DUn" alt=""><figcaption></figcaption></figure>

## 3. Cookie&#x20;

**Description:** Well, there is only one way to survive.

**Link:** [**https://cookiechallenge.pythonanywhere.com/**](https://cookiechallenge.pythonanywhere.com/)

**Credit:** [**Munazir**](https://blog.ycfteam.in/yctf-weekly/)

**Solution:** Visiting the URL, we get the following page to enter the name. Some of you might think it is vulnerable to XSS. But hold on!

<figure><img src="/files/NWWcP3lxOpCYIoNSV8kf" alt=""><figcaption></figcaption></figure>

Directory bruteforcing will lead to the following result which reveals `/cookie` and `/robots.txt`

<figure><img src="/files/OuPPgnSE2n5u57HF6U0O" alt=""><figcaption></figcaption></figure>

Visiting the robots.txt, we get another directory `/sup3r_s3cr3t_d1r`

<figure><img src="/files/3hwaQ40h3vv6fH6AK4E7" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/HHxPEs8oCYzBquQEpLhq" alt=""><figcaption></figcaption></figure>

Visiting `/cookie` directory to get the cookie, and we get the JWT token.&#x20;

<figure><img src="/files/7oI9NjgNiTv6inVoNwet" alt=""><figcaption></figcaption></figure>

Take the token and paste it on <https://token.dev> change the values as admin: true and answer: yes

<figure><img src="/files/nw6MRVtC5aPpeFd2bUg0" alt=""><figcaption></figcaption></figure>

Now visit the `/cookie` again and change the cookie and refresh the page.

<figure><img src="/files/WBNS7y72ARpUMQ4qOkW3" alt=""><figcaption></figcaption></figure>

Then visit the `/sup3r_s3cr3t_d1r` again to get the flag!!!!

<figure><img src="/files/A0DQGnpmb8jOXLullAWD" alt=""><figcaption></figcaption></figure>

## 4. IE10.1

**Description:** Don't run away from problems; facing and solving them is the key to success.

**Link**: <http://yctfinternet.liveblog365.com/>

**Credit:** Gourav Suram

**Writeup link:** [**https://heapbytes.gitbook.io/notes/ctf-writeups/2023-ctfs/yctf-week-2-9-dec-23/web-security**](https://heapbytes.gitbook.io/notes/ctf-writeups/2023-ctfs/yctf-week-2-9-dec-23/web-security)&#x20;

## 5. Confluence

**Description:** Help my friend to download the flag.

**Link:** [**http://139.59.45.27:8090/admin/flag.tar.gz**](http://139.59.45.27:8090/admin/flag.tar.gz)

**Credit:** [**Munazir**](https://blog.ycfteam.in/yctf-weekly/)

**Writeup credit:** Gourav Suram

**Writeup link:** [**https://heapbytes.gitbook.io/notes/ctf-writeups/2023-ctfs/yctf-week-2-9-dec-23/web-security/confluence**](https://heapbytes.gitbook.io/notes/ctf-writeups/2023-ctfs/yctf-week-2-9-dec-23/web-security/confluence)

## 6. VM Writeup


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://blog.ycfteam.in/yctf-weekly/writeups/yctf0x02.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.