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Hack.lu CTF 2021 - Cloudinspect [Pwn]

NOTE: The following is a writeup for the solution we developed independently for this challenge after the end of the competition. Cloudinspect was a pwn challenge during Hack.lu CTF 2021 that got ...

Hack.lu CTF 2021 - Silver Water Industries [Crypto]

Sold: 92 times Type: crypto Risk: Low Seller: 3ul3r The local water supplier Silver Water Industries is planning their IPO. To appeal to current crypto investors, they even implemented a mil...

ASIS CTF Quals 2021 - Beans Talk [Reversing]

NOTE: In this CTF we participated with ripp3rs. Beans talk was a reversing challenge during ASIS CTF Quals 2021 that got 37 solves. We are given a 64 bit binary ELF file with debug info for Linux....

ASIS CTF Quals 2021 - ABBR [Pwn]

NOTE: In this CTF we participated with ripp3rs. Introduction Abbreviations in English are complicated... Why? In this challenge we are given a 64-bit statically linked executable, compiled with...

DigitalOverdoseCTF 2021 - Log Analysis [Analysis]

Log Analysis An incident has affected our website! Fortunately, we have logs. This is a 3-part challenge. Two IIS logs are provided: $ ll *log 9,4M attack.log 46M more.log $ for f in *log; ...

DownUnderCTF 2021 - Write What Where [Pwn]

Write What Where is an easy pwn challenge with 70 solves. We get an x64 executable and a libc shared library. The description of the challenge is the following: You've got one write. What do you d...

DownUnderCTF 2021 - Flag Checker [Reversing]

flag checker was a reversing challenge during DownUnderCTF 2021 that got 16 solves. We are given a stripped 64 bit binary ELF file for Linux. $ file flag_checker flag_checker: ELF 64-bit LSB pie ...

HacktivityCON CTF 2021 - Sharp [Pwn]

Introduction Sharp is the pwn challenge with the fewest solves in Hacktivitycon CTF 2021. We are given a 64-bit binary and a libc shared library. The program is a username manager programmed in C. ...

SunshineCTF 2021 - UselessVM [Reversing]

NOTE: Original post at: http://revpwn.com/Writeups/rev/SunshineCTF-UselessVM/. Problem Description I designed my own virtualized flag storage system a while back. Unfortunately, I think it may hav...

CSAW 2021 - Gotta Decrypt Them All [Crypto]

Gotta Decrypt Them All You are stuck in another dimension while you were riding Solgaleo. You have Rotom-dex with you to contact your friends but he won’t activate the GPS unless you can prove ...