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You're reading from  Windows Malware Analysis Essentials

Product typeBook
Published inSep 2015
Reading LevelIntermediate
Publisher
ISBN-139781785281518
Edition1st Edition
Languages
Assembly
Tools
Windows OS
Concepts
Malware Analysis
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Author (1)
Victor Marak
Victor Marak
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Victor Marak

Victor Marak is a security researcher, an electronic musician, and a world backpacker. He is a college dropout and an autodidact, and he loves working on interesting subjects such as medieval music composition, demonology, DSP electronics, and psychology. He has worked for start-ups, mid-tier, and fortune 500 companies with 5 years of experience in anti-virus technologies and malware research. He was into music production prior to joining the anti-malware industry, and his solo projects are on the world's largest electronic dance music market— Beatport, as well as other major retailers like iTunes, Amazon and Traxxsource. He is in perpetual backpacking mode, set to globe-trotting, especially to his favorite countries in Europe and Russia. He can be found hanging around in the wrong social networks - LinkedIn and Quora. This is his first book.
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Registers

The microprocessor has a set of internal memory scratchpads called registers. These are divided into categories and sub-functions. For 32-bit designs, the general-purpose registers, or rather multipurpose registers, (E is for extended) are EAX, EBX, ECX, EDX, EBP, ESI, EDI, and ESP. Their 16-bit counterparts are AX, BX, CX, DX, BP, SI, DI, and SP

Four of them have the following 8-bit subdivisions, where H means High and L means Low:

  • AX = AH,AL

  • BX = BH,BL

  • CX = CH,CL

  • DX = DH,DL

For 64-bit programming, the general-purpose registers are RAX, RBX, RCX, RDX, RBP, RSI, RDI, and RSP:

  • RAX (addressable as EAX/AX/AH/AL) plays the standard role of an accumulator. It is also used as the placeholder for the return value of a function call. All registers of this set are addressable in a 32/16/8-bit size as well.

  • RBX plays the standard role of base indexing during memory access.

  • RCX is normally used as a counter.

  • RDX is normally used for data operations during division and data type extensions using EAX...

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Windows Malware Analysis Essentials
Published in: Sep 2015Publisher: ISBN-13: 9781785281518
© 2015 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Victor Marak

Victor Marak is a security researcher, an electronic musician, and a world backpacker. He is a college dropout and an autodidact, and he loves working on interesting subjects such as medieval music composition, demonology, DSP electronics, and psychology. He has worked for start-ups, mid-tier, and fortune 500 companies with 5 years of experience in anti-virus technologies and malware research. He was into music production prior to joining the anti-malware industry, and his solo projects are on the world's largest electronic dance music market— Beatport, as well as other major retailers like iTunes, Amazon and Traxxsource. He is in perpetual backpacking mode, set to globe-trotting, especially to his favorite countries in Europe and Russia. He can be found hanging around in the wrong social networks - LinkedIn and Quora. This is his first book.
Read more about Victor Marak

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