mirror of
https://github.com/DosX-dev/Astral-PE
synced 2026-06-06 15:34:31 +00:00
DosX
60 lines
2.7 KiB
C#
60 lines
2.7 KiB
C#
/*
|
|
* This file is part of the Astral-PE project.
|
|
* Copyright (c) 2025 DosX. All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
* Astral-PE is a low-level post-compilation PE header mutator (obfuscator) for native
|
|
* Windows x86/x64 binaries. It modifies structural metadata while preserving execution integrity.
|
|
*
|
|
* For source code, updates, and documentation, visit:
|
|
* https://github.com/DosX-dev/Astral-PE
|
|
*/
|
|
|
|
using PeNet;
|
|
|
|
namespace AstralPE.Obfuscator.Modules {
|
|
public class MinimumOsVersionWiper : IAstralPeModule {
|
|
|
|
/// <summary>
|
|
/// Sets MajorOperatingSystemVersion and MinorOperatingSystemVersion to zero
|
|
/// in the IMAGE_OPTIONAL_HEADER if present.
|
|
/// </summary>
|
|
/// <param name="raw">Raw PE file bytes.</param>
|
|
/// <param name="pe">Parsed PE metadata.</param>
|
|
/// <param name="e_lfanew">Offset to IMAGE_NT_HEADERS.</param>
|
|
/// <param name="optStart">Offset to IMAGE_OPTIONAL_HEADER.</param>
|
|
/// <param name="sectionTableOffset">Offset to section headers.</param>
|
|
/// <param name="rnd">Random number generator (unused).</param>
|
|
public void Apply(ref byte[] raw, PeFile pe, int e_lfanew, int optStart, int sectionTableOffset, Random rnd) {
|
|
int majorOffset = optStart + 0x28,
|
|
minorOffset = optStart + 0x2A;
|
|
|
|
if (minorOffset + 2 > raw.Length)
|
|
throw new IndexOutOfRangeException("OS version fields are outside of file bounds.");
|
|
|
|
// Overwrite 2 bytes each (little-endian ushort = 0x0000)
|
|
raw[majorOffset] = 0x00;
|
|
raw[majorOffset + 1] = 0x00;
|
|
raw[minorOffset] = 0x00;
|
|
raw[minorOffset + 1] = 0x00;
|
|
}
|
|
|
|
}
|
|
} |