-
-
Save SavSanta/308acda1d7bdd45e5a4f83fd1207c45e to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#[ | |
Author: Ward | |
Example of NtAllocateVirtualMemory, NtReadVirtualMemory, NtFreeVirtualMemory | |
References: | |
https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/nf-ntifs-ntallocatevirtualmemory | |
]# | |
import winim/lean | |
# There are no definitions for these APIs in winim yet, define them at first. | |
proc NtAllocateVirtualMemory(processHandle: HANDLE, baseAddress: PVOID, | |
zeroBits: ULONG_PTR, regionSize: PSIZE_T, allocationType: ULONG, | |
Protect: ULONG): NTSTATUS {.stdcall, dynlib: "ntdll", importc, discardable.} | |
proc NtReadVirtualMemory(processHandle: HANDLE, baseAddress: PVOID, | |
buffer: PVOID, bufferSize: ULONG, numberOfBytesRead: PULONG): NTSTATUS | |
{.stdcall, dynlib: "ntdll", importc, discardable.} | |
proc NtFreeVirtualMemory(processHandle: HANDLE, baseAddress: PVOID, | |
regionSize: PSIZE_T, freeType: ULONG): NTSTATUS | |
{.stdcall, dynlib: "ntdll", importc, discardable.} | |
var | |
address: PVOID | |
size: SIZE_T = 1024 | |
if NtAllocateVirtualMemory(-1, &address, 0, &size, MEM_COMMIT, PAGE_READWRITE).NT_SUCCESS: | |
# Write something at the address | |
cast[LPSTR](address) << "This is a message." | |
var | |
buffer = newString(1024) | |
bytesRead: ULONG | |
# Read the message via API | |
if NtReadVirtualMemory(-1, address, &buffer, cint buffer.len, &bytesRead).NT_SUCCESS: | |
buffer.nullTerminate() | |
echo buffer | |
NtFreeVirtualMemory(-1, &address, &size, MEM_RELEASE) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment