1. Software reverse analysis , Try to write the source code of this software

2. The algorithm of the software is analyzed , So as to know the purpose of the algorithm

Crack : After studying the mechanism of software , Or by modifying the program file , Or write the registration machine and randomly generate a valid serial number registration code , To break through its functional limitations .

Reverse debugging :

1. dynamic analysis : Use the dynamic debugging tool to load the program and run it , At the same time, you can pause to view various states at any time

2. static analysis : virus

tool :

1. dynamic --

Ollydbg:32 Bit dynamic tracking tool ,Ring3 Level debugger .

OllylCe: After revision by fans , essence OD.

IDA Pro: Interactive disassembly tool .

x32dbg and x64dbg

Stack :

Is a part of memory , Two properties :

1. Last in, first out ( First in, second out )

2. Address reverse growth ( The bottom of the stack is a large address , The top of the stack is a small address )

It is used to store data temporarily

Push Pressing stack Push words onto the stack

Pop  Spring stack Pop words out of the stack

be careful : Both heap and stack are areas of memory , But not the same .

One , Memory allocation differences

Two , Differences in caching methods

Three , Data structure differences

Assembly instruction :

programing language :

classification : machine language , assembly language , high-level language ( currency )

Yes :win32 assembly , Easy language ( ordinary / static state ),Vb,C,C++,C#,Delphi

notes : Different programming languages have different entry characteristics .

Why identify entrance features ?

Although there is an identification shell / Tools of language (PEID/EXE info PE), But some new shells or others are indistinguishable .

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