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Damn Vulnerable LinuxDamn Vulnerable Linux (DVL) is a Linux-based (modified Damn Small Linux) tool for IT-Security & IT-Anti- Security and Attack & Defense. [CLICK HERE FOR MORE INFOS! ]

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Low Cost Embedded x86 Teaching Tool
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Written by Mappatutu Salihun Darmawan   
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Reverse Engineering Backdoored Binaries

This paper is on reverse engineering backdoored binaries on an x86 Linux Operating System. It is meant for the beginner reverse engineer with some knowledge of ELF, C, x86 ASM, and Linux. We will begin by explaining the basics of our binary from what we can determine by disassembling and then we will recreate the source code for the evil part of our backdoored binary. You will need a few basic tools for this, objdump, elfsh, hexdump, a text editor. . . and your brain.


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The wide availability of personal computer based on the x86 architecture that conform to the PCI specification version 2.1 and Plug and Play BIOS specification version 1.0A or higher, along with the existence of free open source software development tools for this architecture, provides an opportunity to create a low cost embedded system teaching tool based on it. In this paper we will explain one of the implementation of this idea by exploiting the so called "Bootstrap Entry Vector" that exist as part of the Plug and Play BIOS.
Download: pdf Low Cost Embedded x86 Teaching Tool