Learning Reverse Engineer

[Cypher]

Yes. Start on offline games. Excellent recommendation.

The first game I hacked was Minesweeper! WOOT! (Serious :P)

[Sychotix]

Yes. Start on offline games. Excellent recommendation.

The first game I hacked was Minesweeper! WOOT! (Serious :P)

make that timer go backwards baby! =P (sub eax (or w/e register) to add eax)... at least thats what it was for health subtraction on Doom 95 =D too bad all their damage was calculated in the same place -.- even mobs.

[Cypher]

make that timer go backwards baby! =P (sub eax (or w/e register) to add eax)... at least thats what it was for health subtraction on Doom 95 =D too bad all their damage was calculated in the same place -.- even mobs.

Yea but you can avoid stuff like that by using clever hooks (ie giving yourself full health but not the enemies).

[Sychotix]

yeah... but i wasnt that worried about hacking doom =P i coulda traced the return to see what called it (or went to the first address with olly), and then just put a JMP... but yeah =D

Wish I knew as much as you, but I'm too lazy to go learning all that stuff... thats why I'm going to go to Clemson (WOOT WOOT JUST GOT MY ACCEPTANCE LETTER BTW!!!) for computer programming (and stuff of that sort). Btw cypher, do you know anything about hooking Direct X functions and messing with them? I know a certain someone that you may be interested in helping that has an idea for a hack... not gonna say it who/what though so others dont make it first =P

[jjaa]

yeah... but i wasnt that worried about hacking doom =P i coulda traced the return to see what called it (or went to the first address with olly), and then just put a JMP... but yeah =D

Wish I knew as much as you, but I'm too lazy to go learning all that stuff... thats why I'm going to go to Clemson (WOOT WOOT JUST GOT MY ACCEPTANCE LETTER BTW!!!) for computer programming (and stuff of that sort). Btw cypher, do you know anything about hooking Direct X functions and messing with them? I know a certain someone that you may be interested in helping that has an idea for a hack... not gonna say it who/what though so others dont make it first =P

Hooking DirectX functions is easy

If you don't know how just look at WoWX

[Cypher]

yeah... but i wasnt that worried about hacking doom =P i coulda traced the return to see what called it (or went to the first address with olly), and then just put a JMP... but yeah =D

Wish I knew as much as you, but I'm too lazy to go learning all that stuff... thats why I'm going to go to Clemson (WOOT WOOT JUST GOT MY ACCEPTANCE LETTER BTW!!!) for computer programming (and stuff of that sort). Btw cypher, do you know anything about hooking Direct X functions and messing with them? I know a certain someone that you may be interested in helping that has an idea for a hack... not gonna say it who/what though so others dont make it first =P

Yea. PM me if you want.

[danielrhodea]

so how would one go about disabling signature and glueXML checks

[bonehand]

edit: haha, first post....lulz, the professor in me is showing....

Another method, actually the easiest method, of seeing what C/C++ looks like in assembly is using gcc from the command line to compile your code. You can see the similarities and differences in for, while, do-while loops, if and switch constructs and so much more.

just gcc -s source.cc

It's easier in the beginning to use C code instead of the additional confusion of C++ code to learn the basics. Once you start with something simple like x=x+1, see how things move around in the registers, then add if's and loops...it's interesting and not really time consuming. We used this method to train ourselves for programming in ASM by hand for some little robots in one of my undergrad courses. khepera robot - Google Search check out some videos...

Anyway, you get the ASM files out of this and then you can modify them and compile the .s files into executables and see what you broke!

An live linux distribution is all you need if you don't want to clutter up your desktop/laptop and have better text editors at your finger tips...

While not related to reverse engineering a game, this method will let you identify quicker what IDA or Olly is showing you...

[danielrhodea]

I love you lol, this is soooo smart

[eLaps]

just gcc -s source.cc

gcc -S source.cc
and it's in the AT&T syntax, not intel

[bonehand]

gcc -S source.cc
and it's in the AT&T syntax, not intel

You are right! So I have been told that this should spit out Intel syntax, but I don't have a gnu compiler handy...at least one that supports compiling Intel code...Go Sun!

gcc source.cc -S -masm=intel