Binary

UUTCTF Reversing The Puzzle

The Puzzle Solve the puzzle! $ file ThePuzzle.exe ThePuzzle.exe: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows .NETアプリケーションが与えられる。 .NETなのでdnSpyで解析する。 中身を見るとリソースにQRコードらしいものが…

UUTCTF Reversing Find The Password

Find The Password Run the application and find the password. $ file FindThePassword.exe FindThePassword.exe: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows .NETアプリケーションが与えられる。 実行するとパスワード入力欄…

UUTCTF Reversing Correct Pass

Correct Pass Description Find the correct password in order to access the flag. ELF 32-bitが与えられる。 $ file pass pass: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GN…

ångstromCTF Reversing High Quality Checks

High Quality Checks After two break-ins to his shell server, kmh got super paranoid about a third! He's so paranoid that he abandoned the traditional password storage method and came up with this monstrosity! I reckon he used the flag as t…

ångstromCTF Binary Chain of Rope

Chain of Rope defund found out about this cool new dark web browser! While he was browsing the dark web he came across this service that sells rope chains on the black market, but they're super overpriced! He managed to get the source code…

ångstromCTF Binary Aquarium

Binary Aquarium Here's a nice little program that helps you manage your fish tank. Run it on the shell server at /problems/2019/aquarium/ or connect with nc shell.actf.co 19305. Author: kmh11 ソースコードと実行ファイルが与えられる。 #inclu…

CPCTF 2019 Writeup Binary class Easy Binary passcode

Binary class Description Main.class http://files.problem.cpctf.space/Main.class classファイルが与えられるのでオンラインデコンパイラに投げた。 http://www.javadecompilers.com/ import java.io.PrintStream; public class Main { public Main() {} …