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timelessname.com | ||
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blog.nuculabs.dev
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| | | | | Hello, In this article I'll present you my solution on the Chapter 5 CTF from the book Practical Binary Analysis. For this binary, the hint is to fix four broken things. Running file gives us the following response: 1 2 binary@binary-VirtualBox:~/ctf$ file ./lvl3 ./lvl3: ERROR: ELF 64-bit LSB executable, Motorola Coldfire, version 1 (Novell Modesto) error reading (Invalid argument) And the readelf command gives us: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 binary@binary-VirtualBox:~/ctf$ readelf -h ./lvl3 ELF Header: Magic: 7f 45 4c 46 02 01 01 0b 00 00 00 00 00 00 00 00 Class: ELF64 Data: 2's complement, little endian Version: 1 (current) OS/ABI: Novell - Modesto ABI Version: 0 Type: EXEC (Executable file) Machine: Motorola Coldfire Version: ... | |
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www.caichinger.com
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| | | | | Introduction ELF is the file format used for object files (.o's), binaries, shared libraries and core dumps in Linux. It's actually pretty simple and well thought-out. ELF has the same layout for all architectures, however endianness and word size can differ; relocation types, symbol types and the like may have platform-specific values, and of course the contained code is arch specific. An ELF file provides 2 views on the data it contains: A linking view and an execution view. Those two views can be accessed by two headers: the section header table and the program header table. Linking view: Section Header Table (SHT) The SHT gives an overview on the sections contained in the ELF file. Of particular interest are REL sections (relocations), SYMTAB/DYNSYM (sym... | |
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blog.nuculabs.de
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| | | | | I've recently finished reading a book called Practical Binary Analysis which I consider a state of the art book (review will come soon) and I would like to post my solution to the crackme found in chapter 5. 1. A New CTF ChallengeComplete the new CTF challenge unlocked by the oracle program!You can complete the entire challenge using only the tools discussedin this chapter and what you learned in Chapter 2. After completingthe challenge, don't forget to give the flag you found to the oracle tounlock the next challenge | |
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www.nynaeve.net
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| | | [AI summary] A technical overview of Windows Thread Local Storage (TLS) implementation, covering the TEB structure, allocation mechanisms, and its historical uses in debugging and anti-debugging. | ||
