162 lines
4.3 KiB
C#
162 lines
4.3 KiB
C#
/*
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Copyright (C) 2011 de4dot@gmail.com
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This file is part of de4dot.
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de4dot is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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de4dot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with de4dot. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System.IO;
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using System.Collections.Generic;
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using Mono.Cecil;
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using de4dot.blocks;
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namespace de4dot.deobfuscators.dotNET_Reactor {
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class DeobfuscatorInfo : DeobfuscatorInfoBase {
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public DeobfuscatorInfo()
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: base("dr") {
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}
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internal static string ObfuscatorType {
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get { return "dotNetReactor"; }
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}
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public override string Type {
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get { return ObfuscatorType; }
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}
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public override IDeobfuscator createDeobfuscator() {
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return new Deobfuscator(new Deobfuscator.Options {
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ValidNameRegex = validNameRegex.get(),
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});
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}
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protected override IEnumerable<Option> getOptionsInternal() {
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return new List<Option>() {
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};
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}
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}
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class Deobfuscator : DeobfuscatorBase {
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Options options;
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PE.PeImage peImage;
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byte[] fileData;
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MethodsDecrypter methodsDecrypter;
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StringDecrypter stringDecrypter;
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BooleanDecrypter booleanDecrypter;
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internal class Options : OptionsBase {
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}
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public override string Type {
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get { return DeobfuscatorInfo.ObfuscatorType; }
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}
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public override string Name {
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get { return ".NET Reactor"; }
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}
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public Deobfuscator(Options options)
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: base(options) {
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this.options = options;
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}
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public override void init(ModuleDefinition module) {
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base.init(module);
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}
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protected override int detectInternal() {
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int val = 0;
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if (methodsDecrypter.Detected || stringDecrypter.Detected || booleanDecrypter.Detected)
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val += 100;
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int sum = convert(methodsDecrypter.Detected) +
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convert(stringDecrypter.Detected) +
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convert(booleanDecrypter.Detected);
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if (sum > 1)
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val += 10 * (sum - 1);
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return val;
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}
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static int convert(bool b) {
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return b ? 1 : 0;
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}
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protected override void scanForObfuscator() {
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methodsDecrypter = new MethodsDecrypter(module);
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methodsDecrypter.find();
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stringDecrypter = new StringDecrypter(module);
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stringDecrypter.find();
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booleanDecrypter = new BooleanDecrypter(module);
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booleanDecrypter.find();
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}
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public override byte[] getDecryptedModule() {
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using (var fileStream = new FileStream(module.FullyQualifiedName, FileMode.Open, FileAccess.Read, FileShare.Read)) {
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fileData = new byte[(int)fileStream.Length];
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fileStream.Read(fileData, 0, fileData.Length);
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}
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peImage = new PE.PeImage(fileData);
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if (!methodsDecrypter.decrypt(peImage, DeobfuscatedFile))
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return null;
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return fileData;
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}
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public override IDeobfuscator moduleReloaded(ModuleDefinition module) {
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var newOne = new Deobfuscator(options);
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newOne.setModule(module);
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newOne.fileData = fileData;
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newOne.peImage = new PE.PeImage(fileData);
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newOne.methodsDecrypter = new MethodsDecrypter(module, methodsDecrypter);
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newOne.stringDecrypter = new StringDecrypter(module, stringDecrypter);
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newOne.booleanDecrypter = new BooleanDecrypter(module, booleanDecrypter);
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return newOne;
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}
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public override void deobfuscateBegin() {
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base.deobfuscateBegin();
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stringDecrypter.init(peImage, DeobfuscatedFile);
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booleanDecrypter.init(fileData, DeobfuscatedFile);
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foreach (var info in stringDecrypter.DecrypterInfos) {
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staticStringDecrypter.add(info.method, (method2, args) => {
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return stringDecrypter.decrypt(method2, (int)args[0]);
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});
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}
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DeobfuscatedFile.stringDecryptersAdded();
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}
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public override void deobfuscateMethodEnd(Blocks blocks) {
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base.deobfuscateMethodEnd(blocks);
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}
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public override void deobfuscateEnd() {
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base.deobfuscateEnd();
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}
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public override IEnumerable<string> getStringDecrypterMethods() {
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var list = new List<string>();
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foreach (var info in stringDecrypter.DecrypterInfos)
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list.Add(info.method.MetadataToken.ToInt32().ToString("X8"));
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return list;
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}
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}
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}
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