我爱编程

2018-05-27

2018-05-27  本文已影响0人  L_Longing

逆向观察分值:10

来源: 

                        墨流云

难度:易

参与人数:1516人

Get Flag:345人

答题人数:412人

解题通过率:84%

a simple reverse view

解题链接:

                      http://ctf5.shiyanbar.com/reverse/rev50/rev50                   

1.首先下载好插件,发现打不开。师傅说凡是这种需要选择打开的,需要在kali下打开。

2.接下来再kali下打开。

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2。百度相关的命令,如下:

(1)Linux下chmod 777 修改权限

在linux操作系统下,使用shell命令来操作:

关于权限的问题用chmod命令来修改权限

(2)./命令 ./<可执行程序>

表示运行该程序

(3)Linux file命令用于辨识文件类型。

通过file指令,我们得以辨识该文件的类型。

3.通过kali该插件,介绍关于该插件的基本信息:总体百度翻译 Rev50:ELF 64位LSB可执行文件,X8664,版本1(Sysv),动态链接,解释程序/LIb64/LD-LINUX X8664,SO 2,对于GNU/Linux 2.624,BuffDe[Sa1]=695AC6E2D5E1D05B327 B59D2C2D6EB6ABA99,未被剥离

(1)百度ELF文件:ELF文件

(2)LSB 最低有效位( least significant bit,LSB)指的是一个二进制数字中的第0位(即最低位)。最低有效位和最高有效位是相对应的概念。

4.将插件拖到IDA里面,进行分析,scr=一个很长的字符串,然后将它选中,转换为字符串形式,再进行逆序就可以得出答案。

5.

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