Writing to memory address using ASM?

[pinny]

This is for 1.12.1.
Trying to test something out and inject some code which will be overwriting a memory address at some point.

"mov esi, 267488086"
"mov [4803159], esi"

I am trying to overwrite the 4 bytes of memory at [0x494A57] (Decimal: 4803159) with the integer value 267488086.

However, I get this error:



I'm using BlackMagic in C# to do the asm injection. I have no issues mov'ing to memory locations that I allocated using VirtualAllocEx, but i'm unable to mov to memory locations that pre-existed before I injected. Any tips for what i'm doing wrong here? Thanks

[para_]

Hey Pinny, have you checked the access rights for that address and the surrounding memory? I'm betting it is set to Read-only and you'll need to make it writable.

[pinny]

Hey Pinny, have you checked the access rights for that address and the surrounding memory? I'm betting it is set to Read-only and you'll need to make it writable.

I think this must be the case. I'll have to look into how to go about making it writable for the injected asm. Thanks!

[lolp1]

See MemorySharp/src/MemorySharp/Assembly at master * ZenLulz/MemorySharp * GitHub for a clean 'external' assembly injection imp.