177 lines
5.5 KiB
C#
177 lines
5.5 KiB
C#
/*
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Copyright (C) 2011-2012 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.Collections.Generic;
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using dot10.DotNet;
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using de4dot.blocks;
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using de4dot.code.renamer;
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namespace de4dot.code.deobfuscators.Eazfuscator_NET {
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public class DeobfuscatorInfo : DeobfuscatorInfoBase {
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public const string THE_NAME = "Eazfuscator.NET";
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public const string THE_TYPE = "ef";
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const string DEFAULT_REGEX = @"!^#=&!^dje_.+_ejd$&" + DeobfuscatorBase.DEFAULT_VALID_NAME_REGEX;
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public DeobfuscatorInfo()
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: base(DEFAULT_REGEX) {
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}
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public override string Name {
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get { return THE_NAME; }
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}
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public override string Type {
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get { return THE_TYPE; }
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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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}
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class Deobfuscator : DeobfuscatorBase {
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Options options;
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string obfuscatorName = DeobfuscatorInfo.THE_NAME;
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bool detectedVersion = false;
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DecrypterType decrypterType;
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StringDecrypter stringDecrypter;
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AssemblyResolver assemblyResolver;
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ResourceResolver resourceResolver;
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ResourceMethodsRestorer resourceMethodsRestorer;
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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.THE_TYPE; }
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}
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public override string TypeLong {
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get { return DeobfuscatorInfo.THE_NAME; }
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}
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public override string Name {
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get { return obfuscatorName; }
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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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protected override int detectInternal() {
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int val = 0;
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int sum = toInt32(stringDecrypter.Detected) +
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toInt32(assemblyResolver.Detected) +
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toInt32(resourceResolver.Detected);
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if (sum > 0)
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val += 100 + 10 * (sum - 1);
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if (detectedVersion)
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val += 10;
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return val;
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}
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protected override void scanForObfuscator() {
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decrypterType = new DecrypterType(module, DeobfuscatedFile);
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stringDecrypter = new StringDecrypter(module, decrypterType);
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stringDecrypter.find();
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assemblyResolver = new AssemblyResolver(module, decrypterType);
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assemblyResolver.find();
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resourceResolver = new ResourceResolver(module, assemblyResolver);
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resourceResolver.find();
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if (stringDecrypter.Detected)
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detectVersion();
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}
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void detectVersion() {
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var version = new VersionDetector(module, stringDecrypter).detect();
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if (version == null)
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return;
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detectedVersion = true;
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obfuscatorName = DeobfuscatorInfo.THE_NAME + " " + version;
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}
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public override void deobfuscateBegin() {
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base.deobfuscateBegin();
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stringDecrypter.initialize(DeobfuscatedFile);
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staticStringInliner.add(stringDecrypter.Method, (method2, gim, args) => {
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return stringDecrypter.decrypt((int)args[0]);
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});
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DeobfuscatedFile.stringDecryptersAdded();
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assemblyResolver.initialize(DeobfuscatedFile, this);
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assemblyResolver.initializeEmbeddedFiles();
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addModuleCctorInitCallToBeRemoved(assemblyResolver.InitMethod);
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resourceResolver.initialize(DeobfuscatedFile, this);
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foreach (var info in resourceResolver.mergeResources())
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addResourceToBeRemoved(info.Resource, "Encrypted resources");
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addModuleCctorInitCallToBeRemoved(resourceResolver.InitMethod);
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resourceMethodsRestorer = new ResourceMethodsRestorer(module);
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if ((Operations.RenamerFlags & (RenamerFlags.RenameTypes | RenamerFlags.RenameNamespaces)) != 0)
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resourceMethodsRestorer.find(DeobfuscatedFile, this);
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dumpEmbeddedAssemblies();
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}
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void dumpEmbeddedAssemblies() {
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foreach (var info in assemblyResolver.AssemblyInfos) {
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DeobfuscatedFile.createAssemblyFile(info.Data, info.SimpleName, info.Extension);
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addResourceToBeRemoved(info.Resource, string.Format("Embedded assembly: {0}", info.AssemblyFullName));
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}
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}
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public override void deobfuscateMethodEnd(Blocks blocks) {
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resourceMethodsRestorer.deobfuscate(blocks);
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assemblyResolver.deobfuscate(blocks);
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base.deobfuscateMethodEnd(blocks);
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}
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public override void deobfuscateEnd() {
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if (CanRemoveStringDecrypterType) {
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addTypesToBeRemoved(stringDecrypter.Types, "String decrypter type");
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addTypeToBeRemoved(decrypterType.Type, "Decrypter type");
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addResourceToBeRemoved(stringDecrypter.Resource, "Encrypted strings");
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}
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addTypeToBeRemoved(assemblyResolver.Type, "Assembly resolver type");
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addTypeToBeRemoved(assemblyResolver.OtherType, "Assembly resolver other type");
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addTypeToBeRemoved(resourceResolver.Type, "Resource resolver type");
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addTypeToBeRemoved(resourceMethodsRestorer.Type, "GetManifestResourceStream type");
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addResourceToBeRemoved(resourceMethodsRestorer.Resource, "GetManifestResourceStream type resource");
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fixInterfaces();
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base.deobfuscateEnd();
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}
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public override IEnumerable<int> getStringDecrypterMethods() {
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var list = new List<int>();
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if (stringDecrypter.Method != null)
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list.Add(stringDecrypter.Method.MDToken.ToInt32());
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return list;
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}
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}
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}
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