Add BooleanDecrypter class
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@ -69,6 +69,7 @@
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<Compile Include="deobfuscators\DeobfuscatorInfoBase.cs" />
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<Compile Include="deobfuscators\DeobfuscatorInfoBase.cs" />
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<Compile Include="deobfuscators\DeobUtils.cs" />
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<Compile Include="deobfuscators\DeobUtils.cs" />
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<Compile Include="deobfuscators\Dotfuscator\Deobfuscator.cs" />
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<Compile Include="deobfuscators\Dotfuscator\Deobfuscator.cs" />
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<Compile Include="deobfuscators\dotNET_Reactor\BooleanDecrypter.cs" />
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<Compile Include="deobfuscators\dotNET_Reactor\Deobfuscator.cs" />
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<Compile Include="deobfuscators\dotNET_Reactor\Deobfuscator.cs" />
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<Compile Include="deobfuscators\dotNET_Reactor\EncryptedResource.cs" />
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<Compile Include="deobfuscators\dotNET_Reactor\EncryptedResource.cs" />
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<Compile Include="deobfuscators\dotNET_Reactor\LocalTypes.cs" />
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<Compile Include="deobfuscators\dotNET_Reactor\LocalTypes.cs" />
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80
de4dot.code/deobfuscators/dotNET_Reactor/BooleanDecrypter.cs
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80
de4dot.code/deobfuscators/dotNET_Reactor/BooleanDecrypter.cs
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@ -0,0 +1,80 @@
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/*
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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;
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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 BooleanDecrypter {
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ModuleDefinition module;
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EncryptedResource encryptedResource;
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byte[] fileData;
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byte[] decryptedData;
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public bool Detected {
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get { return encryptedResource.ResourceDecrypterMethod != null; }
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}
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public BooleanDecrypter(ModuleDefinition module) {
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this.module = module;
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this.encryptedResource = new EncryptedResource(module);
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}
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public BooleanDecrypter(ModuleDefinition module, BooleanDecrypter oldOne) {
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this.module = module;
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this.encryptedResource = new EncryptedResource(module, oldOne.encryptedResource);
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}
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public void find() {
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var additionalTypes = new string[] {
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"System.Boolean",
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};
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foreach (var type in module.Types) {
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if (type.BaseType == null || type.BaseType.FullName != "System.Object")
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continue;
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foreach (var method in type.Methods) {
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if (!method.IsStatic || !method.HasBody)
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continue;
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if (!DotNetUtils.isMethod(method, "System.Boolean", "(System.Int32)"))
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continue;
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if (!encryptedResource.couldBeResourceDecrypter(method, additionalTypes))
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continue;
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encryptedResource.ResourceDecrypterMethod = method;
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break;
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}
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}
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}
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public void init(byte[] fileData, ISimpleDeobfuscator simpleDeobfuscator) {
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if (encryptedResource.ResourceDecrypterMethod == null)
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return;
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this.fileData = fileData;
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encryptedResource.init(simpleDeobfuscator);
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decryptedData = encryptedResource.decrypt();
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}
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public bool decrypt(int offset) {
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uint byteOffset = BitConverter.ToUInt32(decryptedData, offset);
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return fileData[byteOffset] == 0x80;
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}
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}
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}
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@ -55,6 +55,7 @@ namespace de4dot.deobfuscators.dotNET_Reactor {
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byte[] fileData;
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byte[] fileData;
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MethodsDecrypter methodsDecrypter;
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MethodsDecrypter methodsDecrypter;
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StringDecrypter stringDecrypter;
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StringDecrypter stringDecrypter;
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BooleanDecrypter booleanDecrypter;
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internal class Options : OptionsBase {
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internal class Options : OptionsBase {
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}
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}
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@ -79,21 +80,29 @@ namespace de4dot.deobfuscators.dotNET_Reactor {
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protected override int detectInternal() {
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protected override int detectInternal() {
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int val = 0;
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int val = 0;
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if (methodsDecrypter.Detected)
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if (methodsDecrypter.Detected || stringDecrypter.Detected || booleanDecrypter.Detected)
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val += 100;
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val += 100;
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else if (stringDecrypter.Detected)
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val += 100;
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int sum = convert(methodsDecrypter.Detected) +
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if (methodsDecrypter.Detected && stringDecrypter.Detected)
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convert(stringDecrypter.Detected) +
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val += 10;
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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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return val;
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}
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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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protected override void scanForObfuscator() {
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methodsDecrypter = new MethodsDecrypter(module);
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methodsDecrypter = new MethodsDecrypter(module);
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methodsDecrypter.find();
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methodsDecrypter.find();
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stringDecrypter = new StringDecrypter(module);
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stringDecrypter = new StringDecrypter(module);
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stringDecrypter.find();
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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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}
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public override byte[] getDecryptedModule() {
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public override byte[] getDecryptedModule() {
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@ -112,9 +121,11 @@ namespace de4dot.deobfuscators.dotNET_Reactor {
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public override IDeobfuscator moduleReloaded(ModuleDefinition module) {
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public override IDeobfuscator moduleReloaded(ModuleDefinition module) {
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var newOne = new Deobfuscator(options);
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var newOne = new Deobfuscator(options);
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newOne.setModule(module);
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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.peImage = new PE.PeImage(fileData);
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newOne.methodsDecrypter = new MethodsDecrypter(module, methodsDecrypter);
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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.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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return newOne;
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}
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}
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@ -122,6 +133,7 @@ namespace de4dot.deobfuscators.dotNET_Reactor {
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base.deobfuscateBegin();
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base.deobfuscateBegin();
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stringDecrypter.init(peImage, DeobfuscatedFile);
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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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foreach (var info in stringDecrypter.DecrypterInfos) {
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staticStringDecrypter.add(info.method, (method2, args) => {
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staticStringDecrypter.add(info.method, (method2, args) => {
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