125 lines
3.1 KiB
C#
125 lines
3.1 KiB
C#
/*
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Copyright (C) 2011-2015 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 dnlib.DotNet;
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using de4dot.blocks;
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namespace de4dot.code.deobfuscators.Rummage {
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public class DeobfuscatorInfo : DeobfuscatorInfoBase {
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public const string THE_NAME = "Rummage";
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public const string THE_TYPE = "rm";
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const string DEFAULT_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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string obfuscatorName = DeobfuscatorInfo.THE_NAME;
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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_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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}
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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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if (sum > 0)
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val += 100 + 10 * (sum - 1);
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return val;
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}
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protected override void ScanForObfuscator() {
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stringDecrypter = new StringDecrypter(module);
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stringDecrypter.Find();
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DetectVersion();
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}
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void DetectVersion() {
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string version;
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switch (stringDecrypter.Version) {
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case RummageVersion.V1_1_445: version = "v1.1 - v2.0"; break;
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case RummageVersion.V2_1_729: version = "v2.1+"; break;
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default: version = null; break;
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}
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if (version != null)
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obfuscatorName += " " + 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();
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}
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public override void DeobfuscateMethodEnd(Blocks blocks) {
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if (CanRemoveStringDecrypterType)
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stringDecrypter.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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AddTypeToBeRemoved(stringDecrypter.Type, "String decrypter type");
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AddTypesToBeRemoved(stringDecrypter.OtherTypes, "Decrypted string type");
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}
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base.DeobfuscateEnd();
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}
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public override IEnumerable<int> GetStringDecrypterMethods() {
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return new List<int>();
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}
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}
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}
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