[Help] Lena's Tuts

[258456]

I just have a question about them. I understand what asm instructions do when i look at them i just don't know why they are there. Like, it's hard to explain, i know what they do but i don't know what they are doing with a program, it's weird. If i finish all of Lena's tuts will i be able to make find addresses for important stuff like recoil and such for fps games?

['Bruno]

Why they are there? i don't get what you mean.

But when those application are reversed, they are reversed "into" ASM (the lowest level for you to understand). It's code pretty much.

[why06]

You can find addreses for recoil without doing Lena's tuts.

Anyway I think I might know what you mean. When I first started the tutorials. I understood that the disassembly was the opcodes that made up the program, what I didn't understand is why the program would start off in ntdll, or why the modules loaded up the way they did, or what C++ looked like when assembled, so though I could understand singular opcodes quite easily it was much harder to understand the entire picture. I was having such a difficult time I actually ended up quitting. Then I read up on asm language and disassembly, I actually began to program a little in asm for a bit using izechelions tutorials. While at the same time studying disassembly using x86 Disassembly - Wikibooks, open books for an open world to see how C++ is compiled. Having programmed in C++ and asm I could think logically in both, C++ looks different assembled then asm does, if that makes sense. The stack frames and how API's will help you get a sense of where you are. If you only can see what's in front of you then your not reversing. you have to force yourself to see the bigger picture from those relatively inconsequential opcodes.

Scope is also very important. Not everything you disassemble is going to make sense in C++, but you have to be malleable enough to just take asm as is, when you can't relate it to higher level code and insightful enough to see when asm does relate to C++. This is why being able to program in both I think is very important. that way the logic caries across on multiple levels. Now I'm a craptastic asm programmer, I can do hello world without having to look at a tut, but that's about it, but even with a little understanding of 32bit and 16 bit x86 asm, it helped me a lot.

The crazy thing is I now spend very little time looking at the actual asm to see what it does. Mainly its about judging program flow, and predicting what code will do from understanding the higher level logic and then predicting the low level asm that might fulfill this task.

['Bruno]

rofl. I RQed lena tuts at around... 2 or 3 tut..

[whit]

rofl. I RQed lena tuts at around... 2 or 3 tut..

..
Im still flowing strong on tut 2

[Void]

I'm flowing strong on tut 0.

[whit]

I'm flowing strong on tut 0.

Tut 2, Get on my level

[aanthonyz]

Tut 2, Get on my level

Were on the same level!

[Hell_Demon]

Lena's tuts? Never done them =)

[xAnthal]

Hello all,

i've recently decided to learn C++ / Reverse engineering, but when i downloaded lena's tutorial package my antivirus warned me about an virus called:

Trojan-Spy.Win32.Ardamax.ega

Is this an false threat or should i be worried?


Thanks in advance.

[aanthonyz]

Its a falsie!