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Programming Languages for hackers and pentesters

To be frank, not a single programming language is enough to become a successful pentest engineer. The reason for this is that pentesters usually need to work with almost any technology like databases, applications, services, operating systems, and network protocols, and the list is endless. So a successful pentest engineer can’t limit himself to a specific technology. Despite all these things, we have listed only a few commonly used programming languages for hackers and pentesters in this article.

Is It Necessary to Learn Programming Languages for a Pentester?

Maybe different people have different answers. But, in my opinion, a programming language is very much required because of several reasons. In advance ethical hacking concepts, you will have to use plenty of scripts and exploits which are written in various programming languages. If you want to earn mastery in exploits, knowledge of programming is a must. And the second main reason is that if you want to use your own tools to perform penetration testing or want to modify the created tools as per your need, then you should write your own codes to create exploits. After all, How long do you rely on the other’s code?

We have listed only six languages here; this doesn’t mean that these are the only languages you should learn. We have picked these languages as we have seen these languages are being used very extensively in pentesting. Secondly, we are not giving rankings from best to worst. In our list, we have kept Python in the first and assembly language in the last. This doesn’t mean that Python is the best, and assembly language is the least to use. In pentesting, there is nothing best than others. Each one of the programming languages is unique. For a typical pentester, it is as good as he has knowledge of programming. Let’s start the list from Python.

1. Python

Python is my all-time favorite language. Python is a very simple, powerful, and general-purpose, high-level programming language. It’s quite popular these days because of its versatility. It can be used as both a programming and scripting language. Because of its simplest nature, object-oriented, rich libraries, and large community, is gaining traction in the cybersecurity field. It’s one of the languages which is very extensively used in hacking, pentesting, and ethical hacking. Using Python, you can easily create many network tools like sniffing tools, password cracker tools, keylogger tools, and GUI tools. In addition to those, Python can be used in creating automation tools, malicious programs, exploit writing, and more. Another big reason to use Python is it supports cross-platform, the same program can be run on multiple platforms. All these features make Python a perfect programming language for hackers and pentesters.

2. Java

Java is another popular programming language used in pentesting. Similar to Python, Java is also a versatile programming language. But, it can’t be used as a scripting language like Python. Java is an open-source, cross-platform, powerful, and general-purpose, high-level language used in multiple areas. Java is being used in web development, application development, and service development for multiple platforms. It is most popular for server-side programming in Apache tomcat and mobile application development. Pentesters admire Java because of its usage in android app development. On top of that, Java is being used in the development of hacking and pentesting GUI-based tools. Taking all these points, we have concluded Java is one of the best programming languages for hackers and pentesters.

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3. C#

C# is among the best programming language for Windows hacking and pentesting. Hackers and Pentesters use C# programming language to create many types of malicious programs like Cryptor, Binder, Dropper, RAT, Ransomeware, fuzzing, and many exploitation tools. And it can also be used in security tools automation. All in all, C# is the right choice for both black hat and white hat hackers.

4. C/C++

This list keeps continuing with C/C++. C/C++ is also known as the father of all high-level programming languages. This programming language has a great contribution to the development of Windows, Linux, and Unix operating systems. As C is the only high-level programming language that offers direct access to a hardware memory address, it is used to manipulate and control hardware resources like processors, RAM, and memory registers. Because of this nature, it is used to create a driver application for Windows operating system most extensively. Moreover, it is used for creating exploits and malicious programs. C is the only high-level programming language used in reverse engineering. As the C/C++ compiler is available for most of the OS platforms, its programs can be run on all standard platforms.

All these nature of C/C++ made this one of the good programming languages for hackers and pentesters.

5. Go Language

Go language is another open-source high-level programming language created by Google. Google has developed Golang similarly to the C language. So it is commonly known as C for the 21st century. Those who know C don’t have to struggle to learn the Go language as it shares the same syntax as C. Along with syntax, it offers pretty much everything that C offers. In program execution, it takes the same amount of time as C. In terms of performance, both are pretty much the same. Go language offers the same hardware accessibility features. You might ask, If everything is the same, then what is the need for Golang? Go language is rich in terms of libraries. Rich libraries and a clean package management system make this language more convenient for writing complex programs.

6. Assembly Language

As a short note, Computer programming languages were divided into three types: Machine Language, Assembly Language, and High-Level Language. In Machine Language, all instructions are written in binary codes, which can be understood only by computers. Assembly Language is similar to machine Language, where Machine Language instructions are represented like simple English-like commands. Ex: IN, OUT, JMP, POP, PUSH, MOV, etc. The last type of language that starts from C to Python is all High-Level Language.

Most hackers and pentesters normally will not pay much attention to assembly language because of its limitations. Assembly Language is rigorous to learn. It is difficult to write complex programs in assembly language. But, to become a successful hacker or pentester, Assembly Language is important to learn. Hackers and pentesters learn this language not to build the code but to break the code. Oftentimes, Assembly Language is used to find the 0-day vulnerabilities because debugging will only happen at the assembly level. Additionally, this is the best programming language for hackers and pentesters to perform Malware Analysis, Reverse Code Engineering, Software Vulnerability Analysis, and Bug Hunting.

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Wrap Up:

We have picked six programming languages for hackers and pentesters here in this article. This doesn’t mean that only these programming languages are enough to become a successful hacker or pentester. For a successful pentester, it is as good as you have your hands on the programming languages. We are going to list another few scripting languages for hackers and pentesters in this article.

Thanks for reading the article. Please visit our site to read more such interesting articles.

About the author

Arun KL

Hi All, I am Arun KL, an IT Security Professional. Founder of “thesecmaster.com”. Enthusiast, Security Blogger, Technical Writer, Editor, Author at TheSecMaster. To know more about me. Follow me on LinkedIn

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  1. In the context of ethical hacking and penetration testing, how does the choice of programming language impact the efficiency and effectiveness of developing and executing exploits? Can you provide examples of scenarios where certain languages excel over others in this field?

    1. C and C++ programming languages are often seen used to create rootkits and driver exploitations where direct memory access is required. Python is the best choice for pen testing because of its vast library support and ease of use. The best part is it can be used as a bash/shell script language. These days, go-lang is getting popular for writing malware programs too.

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