CTF-All-In-One/doc/6.4_writeup.md

6.4 习题答案

• 一、基础知识篇
  • 1.3 Linux 基础
  • 1.4 Web 安全基础
  • 1.5 逆向工程基础
    • 1.5.1 C 语言基础
    • 1.5.2 x86/x64/ARM 汇编基础
    • 1.5.3 Linux ELF
    • 1.5.4 Windows PE
    • 1.5.5 静态链接
    • 1.5.6 动态链接
    • 1.5.7 内存管理
    • 1.5.8 glibc malloc
  • 1.6 密码学基础
  • 1.7 Android 安全基础
• 二、工具篇
  • 2.1 VM
  • 2.1 gdb/peda
  • 2.2 ollydbg
  • 2.3 windbg
  • 2.4 radare2
  • 2.5 IDA Pro
  • 2.6 pwntools
  • 2.8 zio
  • 2.9 metasploit
  • 2.10 binwalk
  • 2.11 Burp Suite
• 三、分类专题篇
  • 3.1 Reverse
  • 3.2 Crypto
  • 3.3 Pwn
  • 3.4 Web
  • 3.5 Misc
  • 3.6 Mobile
• 四、技巧篇
  • 4.1 AWD模式
  • 4.2 Linux 命令行技巧
  • 4.3 GCC 堆栈保护技术
• 五、高级篇
  • 5.1 Fuzz 测试
  • 5.2 Pin 动态二进制插桩
  • 5.3 angr 二进制自动化分析
  • 5.4 反调试技术
• 六、附录
  • 6.1 更多 Linux 工具
  • 6.2 更多 Windows 工具

5.2 Pin 动态二进制插桩

Baleful - picoCTF 2014

Reverse 400 - Hack You 2014

wyvern 500 - CSAW CTF 2015

rev100 - th3jackers CTF 2015

6.1 更多 Linux 工具

Strings - strings_crackme

[firmy@Reverse]$ strings -e L strings_crackme
w0wgreat

Strings - flag_pwnablekr

[firmy@Reverse]$ ./flag_pwnablekr
I will malloc() and strcpy the flag there. take it.
[firmy@Reverse]$ strings flag_pwnablekr | grep UPX
UPX!
$Info: This file is packed with the UPX executable packer http://upx.sf.net $
$Id: UPX 3.08 Copyright (C) 1996-2011 the UPX Team. All Rights Reserved. $
UPX!
UPX!
[firmy@Reverse]$ upx -d flag_pwnablekr
                       Ultimate Packer for eXecutables
                          Copyright (C) 1996 - 2017
UPX 3.94        Markus Oberhumer, Laszlo Molnar & John Reiser   May 12th 2017
        File size         Ratio      Format      Name
   --------------------   ------   -----------   -----------
    883745 <-    335288   37.94%   linux/amd64   flag_pwnablekr
Unpacked 1 file.
[firmy@Reverse]$ strings flag_pwnablekr | grep -i upx
UPX...? sounds like a delivery service :)

xxd - xxd_crackme

[firmy@Reverse]$ xxd -g1 xxd_crackme
......
00001020: 00 00 00 00 67 30 30 64 4a 30 42 21 00 00 00 00  ....g00dJ0B!....
......

[firmy@Reverse]$ strings -d xxd_crackme
......
g00dJ0B!
......