> For the complete documentation index, see [llms.txt](https://ctf.zeyu2001.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ctf.zeyu2001.com/2021/uiuctf-2021.md).

# UIUCTF 2021

![](/files/-Mg92jkv_BG9-ajQkMK9)

This was my first time playing the annual UIUCTF, and I must say it was a really great experience. [Social Engineering Experts](https://ctftime.org/team/154571) ended in 18th place, out of 658 scoring teams.

![](/files/PgJaAzMGtgxvMR3bfeXG)

I tried my hand at a variety of challenges across categories such as forensics and web exploitation.

![](/files/TLAUDSxVAjiEDeO4ryvW)

It was a tough 48 hours, but the satisfaction from solving each challenge was definitely worth it! Glad that [Angmar](https://angmar2722.github.io/CTFwriteups/2021/uiuctf2021/) and I pushed through, solving two of the challenges way past midnight and a few hours before the CTF ended.

![](/files/qDDqR4NnjYAgXBUkFzuz)

I also won a $100 bounty for the first blood on [Pwnies Please](/2021/uiuctf-2021/pwnies_please.md), a machine learning challenge that required solvers to generate adversarial examples to fool an image classification model.

![](/files/rpgXfovKO8KkilvoVCR3)

## Writeups

| Challenge                                                           | Category  |
| ------------------------------------------------------------------- | --------- |
| [back\_to\_basics](/2021/uiuctf-2021/back_to_basics.md)             | crypto    |
| [ponydb](/2021/uiuctf-2021/ponydb.md)                               | web       |
| [yana](/2021/uiuctf-2021/yana.md)                                   | web       |
| [buy\_buy\_buy](/2021/uiuctf-2021/buy_buy_buy.md)                   | misc      |
| [pwnies\_please](/2021/uiuctf-2021/pwnies_please.md)                | misc      |
| [Q-Rious Transmissions](/2021/uiuctf-2021/q-rious-transmissions.md) | misc      |
| [capture the :flag:](/2021/uiuctf-2021/capture-the-flag.md)         | forensics |
| [SUPER](/2021/uiuctf-2021/super.md)                                 | forensics |