[BUGKU] [REVERSE] 逆向入门

[BUGKU] [REVERSE] 逆向入门


例行PEID查壳,发现不是有效的PE文件

winhex打开

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

### 回答1: CTF逆向是CTF竞赛中的一种题型之一,通过逆向工程方法来解决问题。入门CTF逆向需要了解的知识领域很广泛,比如二进制文件、硬件逆向、反汇编技术、加密算法、网络协议等等。下面是一个简单的脑图,介绍了CTF逆向入门所需要掌握的知识点: 首先是二进制文件的相关知识,包括ELF、PE等格式的文件结构和常见工具的使用。其次是反汇编和调试技术,了解汇编语言和调试器的使用方法,可以帮助我们在逆向分析中更深入地了解程序逻辑。接下来是加密算法和转换方式的理解,比如Base64、SHA、AES、DES等加密方式的原理和常见攻击方式。此外,网络协议的了解也是非常重要的,包括TCP/IP协议、HTTP协议、UDP协议等,可以帮助我们理解网络数据的传输和安全隐患。最后,还需要了解一些常见的漏洞和技术,比如堆栈溢出、格式化字符串漏洞、ROP等,可以帮助我们攻击和利用目标程序。总的来说,CTF逆向入门需要多方面的知识储备和实践经验,在不断学习和实践过程中提升自己的能力,才能更好地应对复杂的逆向挑战。 ### 回答2: ctf逆向(reverse)是赛事中的一项重要技能,难度较高,需要掌握一定的专业知识。以下是初学者入门ctf逆向的脑图: 1.计算机组成原理:掌握计算机的各种硬件组件和内部结构,如处理器、内存、I/O设备等。 2.汇编语言:掌握常用汇编指令和机器指令,包括基本的数据类型、运算符、控制结构和子程序等。 3.操作系统:理解操作系统原理,掌握基本的程序调试和反汇编工具,如IDA Pro、OllyDbg等。 4.反编译:了解反编译工具和技术,学会使用OllyDbg进行程序的动态调试和逆向分析。 5.加密技术:了解常见的加密和解密算法,如MD5、SHA1、AES、RSA等。 6.漏洞利用:掌握常见的漏洞类型和利用技术,如缓冲区溢出、格式化字符串漏洞、堆溢出等。 7.网络安全:了解网络安全基础知识,包括TCP/IP协议、网络攻击和防御、网络数据包分析等。 8.实践和练习:参加ctf比赛,通过练习和实践逐步提高自己的逆向技能和解题能力。 通过以上脑图的学习,初学者可以逐步掌握ctf逆向技能,提高自己在竞赛中的排名和成绩。
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