labs:disassembly
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labs:disassembly [2016/04/06 17:04] manuelei |
labs:disassembly [2016/04/07 18:08] manuelei |
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| * Intel IA-32 instruction set reference: http://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.pdf | * Intel IA-32 instruction set reference: http://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.pdf | ||
| - | * We have written a tool which allows you to insert your own machine code (produced e.g. with as) into a binary. It is contained in the same zip folder as the other executables. \\ Usage: ./elf_tool <executable_file> <new_machine_code_file (inject_code.bin)> <insertion_address>. \\ The tool inserts the code into the executable, and writes a jump to the new code at the specified insertion_address (given in hexadecimal, e.g. 80487f0). Note that the inserted jump will **overwrite 5 bytes** of the code, so if the overwritten code is still needed, you have to repeat it in your new code. | + | * We have written a tool which allows you to insert your own machine code (produced e.g. with as) into a binary. It is contained in the same zip folder as the other executables. \\ Usage: ./elf_tool <executable_file> <new_machine_code_file (inject_code.bin)> <insertion_address>. \\ The tool inserts the code into the executable, and writes a jump to the new code at the specified insertion_address (given in hexadecimal, e.g. 80487f0). Note that the inserted jump will **overwrite 6 bytes** of the code, so if the overwritten code is still needed, you have to repeat it in your new code. |
| * Assembling: Write assembly in a file called inject_code.s and execute the following command to get the machine code binary file required for the elf_tool: as %%--%%32 -o inject_code.o inject_code.s && objcopy -O binary inject_code.o inject_code.bin && rm inject_code.o | * Assembling: Write assembly in a file called inject_code.s and execute the following command to get the machine code binary file required for the elf_tool: as %%--%%32 -o inject_code.o inject_code.s && objcopy -O binary inject_code.o inject_code.bin && rm inject_code.o | ||
labs/disassembly.txt · Last modified: 2020/08/31 21:03 (external edit)
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