# IERAE CTF 2024 Backup Notes

****This document is updated by hand!!! Therefore, the organizers sometimes are late, or forget to update this document. If the scoreboard works well, you should refer to it instead of this document because the scoreboard will be updated automatically.****

## [sanity check] Welcome

The last update: 15:30 (JST) 9/21

authored by IERAE

> Welcome to IERAE CTF 2024!
> The flag is on [Discord](https://discord.gg/MGZbu88UzU)

## [misc, warmup] OMG

The last update: 15:30 (JST) 9/21

authored by IERAE

> Oh my God!!!My browser history has been hijacked!
>
> オーマイガー！！！ブラウザの履歴が乗っ取られてしまった！
>
> Challenge: http://35.236.188.145:80

No files distributed.
配布ファイルはありません。

## [rev, warmup] Assignment

The last update: 00:00 (JST) 9/21

authored by hugeh0ge

> Assignment is the root of everything in procedural programs.

https://drive.google.com/file/d/1-FlFDEqNymqoQZF9l7f4iHgbLpqkHzrO/view?usp=sharing

## [rev, easy, was_warmup] Luz Da Lua

The last update: 00:00 (JST) 9/21

authored by n4nu

> The luac file is compiled and tested on Lua 5.4.7
>
> `lua LuzDaLua.luac`

https://drive.google.com/file/d/1xu-dPJC1Ox4puKkK7AJC7atvLkwoS4yb/view?usp=drive_link

## [rev, easy] The Kudryavka Sequence

The last update: 00:00 (JST) 9/21

authored by n4nu

> The flag has been lost.

https://drive.google.com/file/d/1TY93ZfaYYObcrotJVstMBPXL0dQgyX2D/view?usp=sharing

## [rev, medium] analog

The last update: 00:00 (JST) 9/21

authored by noname

> The flag is encoded in analog form.

https://drive.google.com/file/d/1u-B77eK3xnZTE7Yl7peGGarsW0AWKoki/view?usp=drive_link

## [pwn, warmup] This is warmup

The last update: 15:30 (JST) 9/21

authored by hugeh0ge

> Trust me. If this problem is too difficult for you, I don't mind you burying me in the ground!
>
> nc 52.231.220.191 5002

https://drive.google.com/file/d/1Q-eRpEKvyxSPcFcDPxbt-XVMT3SRBnse/view?usp=drive_link

## [pwn, medium] Intel CET Bypass Challenge

The last update: 00:00 (JST) 9/21

authored by hugeh0ge

> This is a userland Intel CET bypass challenge. Read the provided `README` carefully.
>
> `nc 52.165.26.180 8810`

https://drive.google.com/file/d/1jMhLQJwUbEbSrmgmQT_AFLm9Vm2n1b5z/view?usp=drive_link

## [web, warmup] Futari APIs

The last update: 15:30 (JST) 9/21

authored by tyage

> `curl 'http://35.194.136.248:3000/search?user=peroro'`

https://drive.google.com/drive/folders/1jnwznZLLuoSVRbpmwk2O1SaY9j7QFmc_?usp=drive_link

## [crypto, warmup] derangement

The last update: 00:00 (JST) 9/21

authored by gyoza_beer

>I've made a secret magic string, perfectly encrypted!
>`nc 104.199.135.28 55555`

https://drive.google.com/drive/folders/1gu9j658l603lPTal95oBupJ3_JLEo2oq?usp=drive_link

## [crypto, medium] enjoyable lattice

The last update: 00:00 (JST) 9/21

authored by gyoza_beer

> Enjoy lattice encryption!

https://drive.google.com/drive/folders/1u4ceKgNJ4gZ5owWjsw8ZAw4tmb9VkBgw?usp=drive_link

## [crypto, medum] cluster

The last update: 00:00 (JST) 9/21

authored by ta1yak1

>I know there is a cluster of RSA lovers.
>I know there is a cluster of unknown RSA challenges.

https://drive.google.com/drive/folders/14hDHliImFY9_HkeagMj3EEHKcpuVQfrZ?usp=drive_link

## [crypto, medium] Heady Heights

The last update: 00:00 (JST) 9/21

authored by elliptic_shiho

> It's Perfectly Safe!

https://drive.google.com/drive/folders/1CNi31ctJqCLHkjaCOm38ra-yMQEQayXU?usp=drive_link

## [web, homework] passwordless

The last update: 15:30 (JST) 9/21

authored by tyage

> This challenge is a homework problem from IERAE Days 2023 CTF.
> Check https://github.com/gmo-ierae/ierae-days-ctf-2023 for the files.
>
> - Challenge: http://34.146.65.254:4567

## [rev, homework] Vending Slot Machine

The last update: 00:00 (JST) 9/21

authored by n4nu

> This challenge is a homework problem from IERAE Days 2023 CTF.
> Check https://github.com/gmo-ierae/ierae-days-ctf-2023 for the files.