Shellcode is having an important part in cyber intrusion activities and mostly spotted to be executed during the process/thread injection or during the exploitation of memory space that mostly related to a vulnerability. Either way, the purpose of shellcode is to utilize a small executable size so it can run and can trigger further steps of actions in a specifically targeted environment.
Depends on the nature of the shell code itself it can be made for a good purpose or bad one. The analysis of a shellcode requires know-how of which system library and functions will be invoked to help its execution, and depends on the operating system it can be a wide variation of commands from direct calls to an OS functions calls to the hash of the API of certain OS libraries. A good analysis tool can help you dissect a shellcode if the low-level language analysis operation is supported, as any shellcode is coded in assembly language. radare2 is one example of those tools.
In this presentation, I explain how to utilize radare2 for variation of shellcode analysis and will lead you as a tutorial from a basic know-how in analyzing shell code with multiple demonstrations.
I also state the definition of the shellcode to avoid misleading and adding up some samples on interesting cases that can help you to see how they can be utilized for any kind of (bad) purpose that is explaining the importance for all of us in learning how to analyze them. I was having only 30 minutes to present this rich content so I condensed the material in the video of the presentation so please read the slides and pause the video while you are watching, I hope you can learn something from this presentation.
Below the Q&A video published by Unixfreaxjp:
About the author: Unixfreaxjp
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(SecurityAffairs – hacking, malware)
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