2011-10-25 01:44:49 +08:00
|
|
|
|
/*
|
|
|
|
|
Copyright (C) 2011 de4dot@gmail.com
|
|
|
|
|
|
|
|
|
|
This file is part of de4dot.
|
|
|
|
|
|
|
|
|
|
de4dot is free software: you can redistribute it and/or modify
|
|
|
|
|
it under the terms of the GNU General Public License as published by
|
|
|
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
|
|
|
(at your option) any later version.
|
|
|
|
|
|
|
|
|
|
de4dot is distributed in the hope that it will be useful,
|
|
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
|
GNU General Public License for more details.
|
|
|
|
|
|
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
|
|
|
along with de4dot. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
*/
|
|
|
|
|
|
2011-10-27 01:49:25 +08:00
|
|
|
|
using System.IO;
|
2011-10-25 01:44:49 +08:00
|
|
|
|
using System.Collections.Generic;
|
|
|
|
|
using Mono.Cecil;
|
|
|
|
|
using de4dot.blocks;
|
|
|
|
|
|
|
|
|
|
namespace de4dot.deobfuscators.dotNET_Reactor {
|
|
|
|
|
class DeobfuscatorInfo : DeobfuscatorInfoBase {
|
2011-10-27 04:24:31 +08:00
|
|
|
|
BoolOption decryptMethods;
|
|
|
|
|
BoolOption decryptBools;
|
|
|
|
|
|
2011-10-25 01:44:49 +08:00
|
|
|
|
public DeobfuscatorInfo()
|
|
|
|
|
: base("dr") {
|
2011-10-27 04:24:31 +08:00
|
|
|
|
decryptMethods = new BoolOption(null, makeArgName("methods"), "Decrypt methods", true);
|
|
|
|
|
decryptBools = new BoolOption(null, makeArgName("bools"), "Decrypt booleans", true);
|
2011-10-25 01:44:49 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
internal static string ObfuscatorType {
|
2011-10-27 08:07:33 +08:00
|
|
|
|
get { return "dotNet_Reactor"; }
|
2011-10-25 01:44:49 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public override string Type {
|
|
|
|
|
get { return ObfuscatorType; }
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public override IDeobfuscator createDeobfuscator() {
|
|
|
|
|
return new Deobfuscator(new Deobfuscator.Options {
|
|
|
|
|
ValidNameRegex = validNameRegex.get(),
|
2011-10-27 04:24:31 +08:00
|
|
|
|
DecryptMethods = decryptMethods.get(),
|
|
|
|
|
DecryptBools = decryptBools.get(),
|
2011-10-25 01:44:49 +08:00
|
|
|
|
});
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
protected override IEnumerable<Option> getOptionsInternal() {
|
|
|
|
|
return new List<Option>() {
|
2011-10-27 04:24:31 +08:00
|
|
|
|
decryptMethods,
|
|
|
|
|
decryptBools,
|
2011-10-25 01:44:49 +08:00
|
|
|
|
};
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
class Deobfuscator : DeobfuscatorBase {
|
|
|
|
|
Options options;
|
|
|
|
|
|
2011-10-27 01:49:25 +08:00
|
|
|
|
PE.PeImage peImage;
|
|
|
|
|
byte[] fileData;
|
2011-10-25 14:27:36 +08:00
|
|
|
|
MethodsDecrypter methodsDecrypter;
|
2011-10-27 01:49:25 +08:00
|
|
|
|
StringDecrypter stringDecrypter;
|
2011-10-27 02:23:45 +08:00
|
|
|
|
BooleanDecrypter booleanDecrypter;
|
2011-10-27 03:05:35 +08:00
|
|
|
|
BoolValueInliner boolValueInliner;
|
2011-10-25 14:27:36 +08:00
|
|
|
|
|
2011-10-25 01:44:49 +08:00
|
|
|
|
internal class Options : OptionsBase {
|
2011-10-27 04:24:31 +08:00
|
|
|
|
public bool DecryptMethods { get; set; }
|
|
|
|
|
public bool DecryptBools { get; set; }
|
2011-10-25 01:44:49 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public override string Type {
|
|
|
|
|
get { return DeobfuscatorInfo.ObfuscatorType; }
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public override string Name {
|
|
|
|
|
get { return ".NET Reactor"; }
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public Deobfuscator(Options options)
|
|
|
|
|
: base(options) {
|
|
|
|
|
this.options = options;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public override void init(ModuleDefinition module) {
|
|
|
|
|
base.init(module);
|
|
|
|
|
}
|
|
|
|
|
|
2011-10-26 20:29:12 +08:00
|
|
|
|
protected override int detectInternal() {
|
2011-10-25 01:44:49 +08:00
|
|
|
|
int val = 0;
|
|
|
|
|
|
2011-10-27 02:23:45 +08:00
|
|
|
|
if (methodsDecrypter.Detected || stringDecrypter.Detected || booleanDecrypter.Detected)
|
2011-10-27 01:49:25 +08:00
|
|
|
|
val += 100;
|
2011-10-27 02:23:45 +08:00
|
|
|
|
|
|
|
|
|
int sum = convert(methodsDecrypter.Detected) +
|
|
|
|
|
convert(stringDecrypter.Detected) +
|
|
|
|
|
convert(booleanDecrypter.Detected);
|
|
|
|
|
if (sum > 1)
|
|
|
|
|
val += 10 * (sum - 1);
|
2011-10-25 14:27:36 +08:00
|
|
|
|
|
2011-10-25 01:44:49 +08:00
|
|
|
|
return val;
|
|
|
|
|
}
|
|
|
|
|
|
2011-10-27 02:23:45 +08:00
|
|
|
|
static int convert(bool b) {
|
|
|
|
|
return b ? 1 : 0;
|
|
|
|
|
}
|
|
|
|
|
|
2011-10-26 20:29:12 +08:00
|
|
|
|
protected override void scanForObfuscator() {
|
2011-10-25 14:27:36 +08:00
|
|
|
|
methodsDecrypter = new MethodsDecrypter(module);
|
|
|
|
|
methodsDecrypter.find();
|
2011-10-27 01:49:25 +08:00
|
|
|
|
stringDecrypter = new StringDecrypter(module);
|
|
|
|
|
stringDecrypter.find();
|
2011-10-27 02:23:45 +08:00
|
|
|
|
booleanDecrypter = new BooleanDecrypter(module);
|
|
|
|
|
booleanDecrypter.find();
|
2011-10-25 01:44:49 +08:00
|
|
|
|
}
|
|
|
|
|
|
2011-10-26 20:40:55 +08:00
|
|
|
|
public override byte[] getDecryptedModule() {
|
2011-10-27 01:49:25 +08:00
|
|
|
|
using (var fileStream = new FileStream(module.FullyQualifiedName, FileMode.Open, FileAccess.Read, FileShare.Read)) {
|
|
|
|
|
fileData = new byte[(int)fileStream.Length];
|
|
|
|
|
fileStream.Read(fileData, 0, fileData.Length);
|
|
|
|
|
}
|
|
|
|
|
peImage = new PE.PeImage(fileData);
|
|
|
|
|
|
2011-10-27 04:24:31 +08:00
|
|
|
|
if (!options.DecryptMethods)
|
|
|
|
|
return null;
|
|
|
|
|
|
2011-10-27 01:49:25 +08:00
|
|
|
|
if (!methodsDecrypter.decrypt(peImage, DeobfuscatedFile))
|
|
|
|
|
return null;
|
|
|
|
|
|
|
|
|
|
return fileData;
|
2011-10-26 20:40:55 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public override IDeobfuscator moduleReloaded(ModuleDefinition module) {
|
|
|
|
|
var newOne = new Deobfuscator(options);
|
|
|
|
|
newOne.setModule(module);
|
2011-10-27 02:23:45 +08:00
|
|
|
|
newOne.fileData = fileData;
|
2011-10-27 01:49:25 +08:00
|
|
|
|
newOne.peImage = new PE.PeImage(fileData);
|
2011-10-26 20:40:55 +08:00
|
|
|
|
newOne.methodsDecrypter = new MethodsDecrypter(module, methodsDecrypter);
|
2011-10-27 01:49:25 +08:00
|
|
|
|
newOne.stringDecrypter = new StringDecrypter(module, stringDecrypter);
|
2011-10-27 02:23:45 +08:00
|
|
|
|
newOne.booleanDecrypter = new BooleanDecrypter(module, booleanDecrypter);
|
2011-10-26 20:40:55 +08:00
|
|
|
|
return newOne;
|
|
|
|
|
}
|
|
|
|
|
|
2011-10-25 01:44:49 +08:00
|
|
|
|
public override void deobfuscateBegin() {
|
|
|
|
|
base.deobfuscateBegin();
|
2011-10-27 01:49:25 +08:00
|
|
|
|
|
2011-10-28 07:33:05 +08:00
|
|
|
|
stringDecrypter.init(peImage, fileData, DeobfuscatedFile);
|
2011-10-27 02:23:45 +08:00
|
|
|
|
booleanDecrypter.init(fileData, DeobfuscatedFile);
|
2011-10-27 03:05:35 +08:00
|
|
|
|
boolValueInliner = new BoolValueInliner();
|
|
|
|
|
|
2011-10-27 04:24:31 +08:00
|
|
|
|
if (options.DecryptBools) {
|
|
|
|
|
boolValueInliner.add(booleanDecrypter.BoolDecrypterMethod, (method, args) => {
|
|
|
|
|
return booleanDecrypter.decrypt((int)args[0]);
|
|
|
|
|
});
|
|
|
|
|
}
|
2011-10-27 01:49:25 +08:00
|
|
|
|
|
|
|
|
|
foreach (var info in stringDecrypter.DecrypterInfos) {
|
|
|
|
|
staticStringDecrypter.add(info.method, (method2, args) => {
|
|
|
|
|
return stringDecrypter.decrypt(method2, (int)args[0]);
|
|
|
|
|
});
|
|
|
|
|
}
|
2011-10-28 04:25:44 +08:00
|
|
|
|
if (stringDecrypter.OtherStringDecrypter != null) {
|
|
|
|
|
staticStringDecrypter.add(stringDecrypter.OtherStringDecrypter, (method2, args) => {
|
|
|
|
|
return stringDecrypter.decrypt((string)args[0]);
|
|
|
|
|
});
|
|
|
|
|
}
|
2011-10-27 01:49:25 +08:00
|
|
|
|
DeobfuscatedFile.stringDecryptersAdded();
|
2011-10-27 05:00:01 +08:00
|
|
|
|
|
|
|
|
|
if (Operations.DecryptStrings != OpDecryptString.None)
|
|
|
|
|
addResourceToBeRemoved(stringDecrypter.StringsResource, "Encrypted strings");
|
|
|
|
|
if (options.DecryptMethods) {
|
|
|
|
|
addResourceToBeRemoved(methodsDecrypter.MethodsResource, "Encrypted methods");
|
|
|
|
|
addCctorInitCallToBeRemoved(methodsDecrypter.MethodsDecrypterMethod);
|
|
|
|
|
}
|
|
|
|
|
if (options.DecryptBools)
|
|
|
|
|
addResourceToBeRemoved(booleanDecrypter.BooleansResource, "Encrypted booleans");
|
|
|
|
|
if (Operations.DecryptStrings != OpDecryptString.None && options.DecryptMethods && options.DecryptBools)
|
|
|
|
|
addTypeToBeRemoved(methodsDecrypter.MethodsDecrypterMethod.DeclaringType, "Decrypter type");
|
2011-10-25 01:44:49 +08:00
|
|
|
|
}
|
|
|
|
|
|
2011-10-27 04:16:51 +08:00
|
|
|
|
public override bool deobfuscateOther(Blocks blocks) {
|
2011-10-27 03:05:35 +08:00
|
|
|
|
if (boolValueInliner.HasHandlers)
|
2011-10-27 04:16:51 +08:00
|
|
|
|
return boolValueInliner.decrypt(blocks) > 0;
|
|
|
|
|
return false;
|
|
|
|
|
}
|
2011-10-27 03:05:35 +08:00
|
|
|
|
|
2011-10-27 04:16:51 +08:00
|
|
|
|
public override void deobfuscateMethodEnd(Blocks blocks) {
|
2011-10-25 01:44:49 +08:00
|
|
|
|
base.deobfuscateMethodEnd(blocks);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public override void deobfuscateEnd() {
|
|
|
|
|
base.deobfuscateEnd();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public override IEnumerable<string> getStringDecrypterMethods() {
|
|
|
|
|
var list = new List<string>();
|
2011-10-27 01:49:25 +08:00
|
|
|
|
foreach (var info in stringDecrypter.DecrypterInfos)
|
|
|
|
|
list.Add(info.method.MetadataToken.ToInt32().ToString("X8"));
|
2011-10-25 01:44:49 +08:00
|
|
|
|
return list;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|