mirror of
https://github.com/DosX-dev/Astral-PE
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DosX
73 lines
3.6 KiB
C#
73 lines
3.6 KiB
C#
/*
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* This file is part of the Astral-PE project.
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* Copyright (c) 2025 DosX. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Astral-PE is a low-level post-compilation PE header mutator (obfuscator) for native
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* Windows x86/x64 binaries. It modifies structural metadata while preserving execution integrity.
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*
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* For source code, updates, and documentation, visit:
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* https://github.com/DosX-dev/Astral-PE
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*/
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using PeNet;
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namespace AstralPE.Obfuscator.Modules {
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public class SectionNameWiper : IAstralPeModule {
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// The size of a section header in the PE file format (40 bytes).
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private const int SectionHeaderSize = 40;
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/// <summary>
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/// Wipes the names of all sections in the PE file.
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/// This is done by clearing the first 8 bytes (section name) of each section header.
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/// </summary>
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/// <param name="raw">The raw byte array representing the PE file.</param>
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/// <param name="pe">The parsed PE file object containing section headers.</param>
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/// <param name="e_lfanew">The offset to the IMAGE_NT_HEADERS.</param>
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/// <param name="optStart">The offset to the Optional Header.</param>
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/// <param name="sectionTableOffset">The offset to the section table.</param>
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/// <param name="rnd">Random generator, which is not used in this method.</param>
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public void Apply(ref byte[] raw, PeFile pe, int e_lfanew, int optStart, int sectionTableOffset, Random rnd) {
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// Ensure the section headers are present
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if (pe.ImageSectionHeaders == null)
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throw new InvalidPeImageException();
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// Check that section table offset is not obviously broken
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if (sectionTableOffset <= 0 || sectionTableOffset > raw.Length)
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throw new ArgumentOutOfRangeException(nameof(sectionTableOffset), "Section table offset is invalid.");
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// Iterate through all section headers in the PE file
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for (int i = 0; i < pe.ImageSectionHeaders.Length; i++) {
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// Calculate the offset of the current section header
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int sectionNameOffset = sectionTableOffset + i * SectionHeaderSize;
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// Bounds check to avoid corrupting memory
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if (sectionNameOffset + 8 > raw.Length)
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throw new IndexOutOfRangeException("Section name offset exceeds buffer length.");
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// Clear the first 8 bytes of each section header (section name)
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for (int j = 0; j < 8; j++)
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raw[sectionNameOffset + j] = 0x00;
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}
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}
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}
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}
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