114 lines
3.1 KiB
C#
114 lines
3.1 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.Collections.Generic;
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using Mono.Cecil;
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namespace de4dot.deobfuscators.Xenocode {
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class DeobfuscatorInfo : DeobfuscatorInfoBase {
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public const string THE_NAME = "Xenocode";
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const string DEFAULT_REGEX = @"!^[oO01l]{4,}$&!^_?x[a-f0-9]{16,}$&" + 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 "xc"; }
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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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bool foundXenocodeAttribute = false;
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StringDecrypter stringDecrypter;
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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_NAME; }
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}
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public override string Name {
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get { return Type; }
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}
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public Deobfuscator(Options options)
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: base(options) {
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}
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protected override int detectInternal() {
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int val = 0;
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if (foundXenocodeAttribute || stringDecrypter.Detected)
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val += 100;
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if (foundXenocodeAttribute && stringDecrypter.Detected)
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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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findXenocodeAttribute();
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stringDecrypter = new StringDecrypter(module);
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stringDecrypter.find();
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}
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void findXenocodeAttribute() {
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foreach (var type in module.Types) {
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switch (type.FullName) {
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case "Xenocode.Client.Attributes.AssemblyAttributes.ProcessedByXenocode":
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case "Xenocode.Client.Attributes.AssemblyAttributes.SuppressDisassembly":
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addAttributeToBeRemoved(type, "Obfuscator attribute");
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foundXenocodeAttribute = true;
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break;
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}
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}
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}
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public override void deobfuscateBegin() {
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base.deobfuscateBegin();
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staticStringDecrypter.add(stringDecrypter.StringDecrypterMethod, (method, args) => stringDecrypter.decrypt((string)args[0], (int)args[1]));
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}
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public override void deobfuscateEnd() {
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if (Operations.DecryptStrings != OpDecryptString.None)
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addTypeToBeRemoved(stringDecrypter.Type, "String decrypter type");
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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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if (stringDecrypter.StringDecrypterMethod != null)
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list.Add(stringDecrypter.StringDecrypterMethod.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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