Tutorial on W32Dasm!
Once you got it unzipped just click on the w32dasm.exe
and W32dasm open...better to have full screen view if it doesnt automatically open like this.
To open a file to disassemble you can either go to Disassembler menu (thats top left) and
click 'open file to disassemble', or click on
the 'open file to disassemble' button (top left but directly below the menu option):
In the message box that appears, just scroll round till you find the program you want (in our case it gonna be crackme1.exe)
and click open.
You now got a whole 'dead listing' of the programs code,
and you should be able to follow the tuts you find that use this tool.
If you look along the top you see a row of menu items and below these a row of buttons. A few of the buttons you should get familiar with are:
Note: these buttons will 'light up' when they are useable.
Another function you use quite often is the 'Goto' menu...along the top about halfway. Click on this menu item and you get four options, but probably the one you use most is
'Goto Code Location'...the last of the four. Click this option and a box appears. Type in the code location, (obviously only if you know it) click ok, and you be taken to that line of code. Shift/F12 also brings up this box:
There one more thing I explain coz a lot of tuts mention it. This is the offset. Once you found the relevant bit of code that you think you got to change you highlight the line, then look down bottom and you'll see this:
See right at bottom: 'Line 896 Pg 11 of 32 Code Data @ blah blah @ Offset 00001595h. What we interested in is Offset 00001595h... Forget the zeros at the beginning, and the h at the end means hex. Take note of the remaining numbers...1595...that the offset. Thats the number we put in hiew to take us to that piece of code we want to change.
Anyway, get used to this program coz a lot of tuts use it.