SLAE #4: Encoding Shellcode for Linux/x86

Introduction This blog series has been created for completing the requirements of the SecurityTube Linux Assembly Expert certification: http://securitytube-training.com/online-courses/securitytube-linux-assembly-expert/ Student ID: SLAE-877 To get the code provided in this exercise: % git clone https://github.com/droberson/SLAE.git The code will be within the Assignment-4 directory. What is an Encoder? An encoder takes a set of data and transforms …

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SLAE #3: Egg Hunters for Linux/x86

Introduction This blog series has been created for completing the requirements of the SecurityTube Linux Assembly Expert certification: http://securitytube-training.com/online-courses/securitytube-linux-assembly-expert/ Student ID: SLAE-877 To get the code provided in this exercise: % git clone https://github.com/droberson/SLAE.git The code will be within the Assignment-3 directory. What is an Egg Hunter? Egg hunter shellcodes are one example of a …

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SLAE #2: Reverse Shell For Linux/x86

Introduction This blog series has been created for completing the requirements of the SecurityTube Linux Assembly Expert certification: http://securitytube-training.com/online-courses/securitytube-linux-assembly-expert/ Student ID: SLAE-877 To get the code provided in this exercise: % git clone https://github.com/droberson/SLAE.git The code will be within the Assignment-2 directory. The previous post outlined how the basics of writing shellcode and the prerequisite …

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SLAE #1: Bindshell Shellcode for Linux/x86

Introduction This blog series has been created for completing the requirements of the SecurityTube Linux Assembly Expert certification: http://securitytube-training.com/online-courses/securitytube-linux-assembly-expert/ Student ID: SLAE-877 This course is an introduction to writing shellcode for Linux systems running on 32 bit x86 architecture. It consists of seven assignments: Writing a TCP bind shell shellcode Writing a reverse (connectback) shellcode A …

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Windows base64 Encoding and Decoding Using certutil

I ran into a scenario where I was able to upload ASCII files, but executable files were being saved improperly. A common workaround for this is to use base64 to encode the executable, transfer the encoded data, then decode it on the recipient machine. The version of Windows I was using did not have base64 …

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