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Questions tagged [patching]

Patching is the process of adding or deleting code from an executable file in order to modify its functioning.

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5 votes
1 answer

Replacing small length instruction with larger length instruction

Basically I want to replace MOVS R1, #0x0 with MOV.W R1, #0x123, since later instruction requires 4 bytes it is impossible to simply replace in HEX code. I am using IDA Pro for analyzing native ...
user2578525's user avatar
5 votes
4 answers

Are there any modern assembly-level patching tools?

I've recently been undertaking a little RE project where I needed to patch the executable. For small modifications, I know enough x86 to patch in an jump, nop, infinite loop, etc, so a hex editor is ...
ultramancool's user avatar
7 votes
2 answers

Virus uses a custom XOR encryption and need help possibly cracking it / Reversing EXE

As stated in my previous question i was infected by a encrypting virus that encrypts two 1024 byte blocks of any given file (First 1024, and last 1024) in some type of custom CFB XOR encryption. I ...
user3546043's user avatar
3 votes
2 answers

Convert Mach-O VM Address To File Offset

this maybe total no brainer but i'm really new to this and i'd really appreciate some help! Basically i'm trying to patch(out aka nop) a obj-c function inside an iOS Application. I've successfully ...
Malte's user avatar
  • 183
2 votes
2 answers

Avoid re-enabling patches between reruns in Ollydbg

In Ollydbg 1.1, when I create on the fly patches, they're automatically disabled when I restart the application (the debugged one, not Olly) and I have to enable them manually again. Is there a menu ...
Mellowcandle's user avatar
  • 4,825
2 votes
2 answers

translate arm instructions to hex

I looking for simple tool(not site) to translate arm instruction to hex like Without linker , I want put 1 instruction , and want get the hex . Do you know one please?'s user avatar
2 votes
1 answer

Turn ¨Assemble¨ option on, in IDA Pro Demo

Is there a way to highlight "assemble" option in EDIT menu at IDA pro to apply a patch. Guess that idagui.cfg must be changed at some point, and turn NO to YES somewhere. I use the last demo version....
danielsoy's user avatar