Hello,
i tryed to modify jz to jnz in w32dasm and ida but it doesnt work.
Is there an other debugger for that task??

Please help

ollydbg?

in case you dont know how to do it in OllyDbg, after changing the jz to jnz, look for 'save changes to executable' from right-click menu

Make sure you're using the correct opcode. You will end up with an invalid image if you use an opcode of different length. There are a few utilities around, but i use this one for the most part currently. Hope it helps.

Ehtyar.

thanks!

usually, OllyDbg's built-in utility to 'code' while debugging works so no need for manually changing opcodes.

You gave me a idea to write a generic file patcher to patch files based on the offset got in w32dasm.
Soon I'll upload in my home page when it's completed.
For screenshot see: http://board.flatassembler.net/topic.php?t=6179
If you want an alpha version send me a PM.

note: to negate condition of jump, you just need to invert lowest bit. eg 70<->71, 72<->73 etc.

to make it unconditional jump, rewrite it to EB

common thingies when you... err.. "reversere engineer" a lot

vid: you've been reported to the proper authorities ;D