Merge other proxy method class with the V10 one
This commit is contained in:
parent
94acbc7131
commit
a2798908b0
|
@ -73,7 +73,6 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
List<EmbeddedAssemblyInfo> embeddedAssemblyInfos = new List<EmbeddedAssemblyInfo>();
|
List<EmbeddedAssemblyInfo> embeddedAssemblyInfos = new List<EmbeddedAssemblyInfo>();
|
||||||
JitMethodsDecrypter jitMethodsDecrypter;
|
JitMethodsDecrypter jitMethodsDecrypter;
|
||||||
MemoryMethodsDecrypter memoryMethodsDecrypter;
|
MemoryMethodsDecrypter memoryMethodsDecrypter;
|
||||||
ProxyCallFixer proxyCallFixer;
|
|
||||||
ProxyCallFixerV10 proxyCallFixerV10;
|
ProxyCallFixerV10 proxyCallFixerV10;
|
||||||
AntiDebugger antiDebugger;
|
AntiDebugger antiDebugger;
|
||||||
AntiDumping antiDumping;
|
AntiDumping antiDumping;
|
||||||
|
@ -134,7 +133,6 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
|
|
||||||
int sum = toInt32(jitMethodsDecrypter != null ? jitMethodsDecrypter.Detected : false) +
|
int sum = toInt32(jitMethodsDecrypter != null ? jitMethodsDecrypter.Detected : false) +
|
||||||
toInt32(memoryMethodsDecrypter != null ? memoryMethodsDecrypter.Detected : false) +
|
toInt32(memoryMethodsDecrypter != null ? memoryMethodsDecrypter.Detected : false) +
|
||||||
toInt32(proxyCallFixer != null ? proxyCallFixer.Detected : false) +
|
|
||||||
toInt32(proxyCallFixerV10 != null ? proxyCallFixerV10.Detected : false) +
|
toInt32(proxyCallFixerV10 != null ? proxyCallFixerV10.Detected : false) +
|
||||||
toInt32(antiDebugger != null ? antiDebugger.Detected : false) +
|
toInt32(antiDebugger != null ? antiDebugger.Detected : false) +
|
||||||
toInt32(antiDumping != null ? antiDumping.Detected : false) +
|
toInt32(antiDumping != null ? antiDumping.Detected : false) +
|
||||||
|
@ -191,12 +189,8 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
}
|
}
|
||||||
} while (false);
|
} while (false);
|
||||||
|
|
||||||
proxyCallFixer = new ProxyCallFixer(module, getFileData(), DeobfuscatedFile);
|
|
||||||
proxyCallFixer.findDelegateCreator();
|
|
||||||
if (!proxyCallFixer.Detected) {
|
|
||||||
proxyCallFixerV10 = new ProxyCallFixerV10(module, getFileData());
|
proxyCallFixerV10 = new ProxyCallFixerV10(module, getFileData());
|
||||||
proxyCallFixerV10.findDelegateCreator(DeobfuscatedFile);
|
proxyCallFixerV10.findDelegateCreator(DeobfuscatedFile);
|
||||||
}
|
|
||||||
antiDebugger = new AntiDebugger(module);
|
antiDebugger = new AntiDebugger(module);
|
||||||
antiDebugger.find();
|
antiDebugger.find();
|
||||||
antiDumping = new AntiDumping(module);
|
antiDumping = new AntiDumping(module);
|
||||||
|
@ -346,8 +340,6 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
addTypeToBeRemoved(antiDumping.Type, "Anti dumping type");
|
addTypeToBeRemoved(antiDumping.Type, "Anti dumping type");
|
||||||
}
|
}
|
||||||
|
|
||||||
if (proxyCallFixer != null)
|
|
||||||
proxyCallFixer.find();
|
|
||||||
if (proxyCallFixerV10 != null)
|
if (proxyCallFixerV10 != null)
|
||||||
proxyCallFixerV10.find();
|
proxyCallFixerV10.find();
|
||||||
|
|
||||||
|
@ -503,8 +495,6 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
}
|
}
|
||||||
|
|
||||||
public override void deobfuscateMethodEnd(Blocks blocks) {
|
public override void deobfuscateMethodEnd(Blocks blocks) {
|
||||||
if (proxyCallFixer != null)
|
|
||||||
proxyCallFixer.deobfuscate(blocks);
|
|
||||||
if (proxyCallFixerV10 != null)
|
if (proxyCallFixerV10 != null)
|
||||||
proxyCallFixerV10.deobfuscate(blocks);
|
proxyCallFixerV10.deobfuscate(blocks);
|
||||||
resourceDecrypter.deobfuscate(blocks);
|
resourceDecrypter.deobfuscate(blocks);
|
||||||
|
@ -519,8 +509,6 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
}
|
}
|
||||||
|
|
||||||
public override void deobfuscateEnd() {
|
public override void deobfuscateEnd() {
|
||||||
if (proxyCallFixer != null)
|
|
||||||
removeProxyDelegates(proxyCallFixer);
|
|
||||||
if (proxyCallFixerV10 != null) {
|
if (proxyCallFixerV10 != null) {
|
||||||
if (removeProxyDelegates(proxyCallFixerV10))
|
if (removeProxyDelegates(proxyCallFixerV10))
|
||||||
addFieldsToBeRemoved(proxyCallFixerV10.Fields, "Proxy delegate instance field");
|
addFieldsToBeRemoved(proxyCallFixerV10.Fields, "Proxy delegate instance field");
|
||||||
|
|
|
@ -1,274 +0,0 @@
|
||||||
/*
|
|
||||||
Copyright (C) 2011-2012 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/>.
|
|
||||||
*/
|
|
||||||
|
|
||||||
using System;
|
|
||||||
using System.Collections.Generic;
|
|
||||||
using Mono.Cecil;
|
|
||||||
using Mono.Cecil.Cil;
|
|
||||||
using de4dot.blocks;
|
|
||||||
using de4dot.PE;
|
|
||||||
|
|
||||||
namespace de4dot.code.deobfuscators.Confuser {
|
|
||||||
// Since 1.8 r75367
|
|
||||||
class ProxyCallFixer : ProxyCallFixer2 {
|
|
||||||
byte[] fileData;
|
|
||||||
ISimpleDeobfuscator simpleDeobfuscator;
|
|
||||||
MethodDefinitionAndDeclaringTypeDict<ProxyCreatorInfo> methodToInfo = new MethodDefinitionAndDeclaringTypeDict<ProxyCreatorInfo>();
|
|
||||||
FieldDefinitionAndDeclaringTypeDict<MethodDefinition> fieldToMethod = new FieldDefinitionAndDeclaringTypeDict<MethodDefinition>();
|
|
||||||
x86Emulator x86emu;
|
|
||||||
|
|
||||||
enum ProxyCreatorType {
|
|
||||||
None,
|
|
||||||
CallOrCallvirt,
|
|
||||||
Newobj,
|
|
||||||
}
|
|
||||||
|
|
||||||
class ProxyCreatorInfo {
|
|
||||||
public readonly MethodDefinition creatorMethod;
|
|
||||||
public readonly ProxyCreatorType proxyCreatorType;
|
|
||||||
public uint? key;
|
|
||||||
public MethodDefinition nativeMethod;
|
|
||||||
public ushort callvirtChar;
|
|
||||||
|
|
||||||
public ProxyCreatorInfo(MethodDefinition creatorMethod, ProxyCreatorType proxyCreatorType) {
|
|
||||||
this.creatorMethod = creatorMethod;
|
|
||||||
this.proxyCreatorType = proxyCreatorType;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
protected override bool ProxyCallIsObfuscated {
|
|
||||||
get { return true; }
|
|
||||||
}
|
|
||||||
|
|
||||||
public override IEnumerable<Tuple<MethodDefinition, string>> OtherMethods {
|
|
||||||
get {
|
|
||||||
var list = new List<Tuple<MethodDefinition, string>>();
|
|
||||||
foreach (var info in methodToInfo.getValues()) {
|
|
||||||
list.Add(new Tuple<MethodDefinition, string> {
|
|
||||||
Item1 = info.creatorMethod,
|
|
||||||
Item2 = "Delegate creator method",
|
|
||||||
});
|
|
||||||
list.Add(new Tuple<MethodDefinition, string> {
|
|
||||||
Item1 = info.nativeMethod,
|
|
||||||
Item2 = "Calculate RID native method",
|
|
||||||
});
|
|
||||||
}
|
|
||||||
return list;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
public ProxyCallFixer(ModuleDefinition module, byte[] fileData, ISimpleDeobfuscator simpleDeobfuscator)
|
|
||||||
: base(module) {
|
|
||||||
this.fileData = fileData;
|
|
||||||
this.simpleDeobfuscator = simpleDeobfuscator;
|
|
||||||
}
|
|
||||||
|
|
||||||
protected override object checkCctor(TypeDefinition type, MethodDefinition cctor) {
|
|
||||||
var instrs = cctor.Body.Instructions;
|
|
||||||
object retVal = null;
|
|
||||||
for (int i = 0; i < instrs.Count - 1; i++) {
|
|
||||||
var ldtoken = instrs[i];
|
|
||||||
if (ldtoken.OpCode.Code != Code.Ldtoken)
|
|
||||||
continue;
|
|
||||||
var field = ldtoken.Operand as FieldDefinition;
|
|
||||||
if (field == null)
|
|
||||||
continue;
|
|
||||||
|
|
||||||
var call = instrs[i + 1];
|
|
||||||
if (call.OpCode.Code != Code.Call)
|
|
||||||
continue;
|
|
||||||
var calledMethod = call.Operand as MethodDefinition;
|
|
||||||
if (!isDelegateCreatorMethod(calledMethod))
|
|
||||||
continue;
|
|
||||||
|
|
||||||
fieldToMethod.add(field, calledMethod);
|
|
||||||
retVal = this;
|
|
||||||
}
|
|
||||||
return retVal;
|
|
||||||
}
|
|
||||||
|
|
||||||
protected override void getCallInfo(object context, FieldDefinition field, out MethodReference calledMethod, out OpCode callOpcode) {
|
|
||||||
var info = getProxyCreatorInfo(field);
|
|
||||||
var sig = module.GetSignatureBlob(field);
|
|
||||||
int len = sig.Length;
|
|
||||||
uint magic = (uint)((sig[len - 2] << 24) | (sig[len - 3] << 16) | (sig[len - 5] << 8) | sig[len - 6]);
|
|
||||||
uint rid = getRid(info, magic);
|
|
||||||
int token = (sig[len - 7] << 24) | (int)rid;
|
|
||||||
calledMethod = module.LookupToken(token) as MethodReference;
|
|
||||||
callOpcode = getCallOpCode(info, field);
|
|
||||||
}
|
|
||||||
|
|
||||||
OpCode getCallOpCode(ProxyCreatorInfo info, FieldDefinition field) {
|
|
||||||
switch (info.proxyCreatorType) {
|
|
||||||
case ProxyCreatorType.CallOrCallvirt:
|
|
||||||
if (field.Name.Length > 0 && field.Name[0] == info.callvirtChar)
|
|
||||||
return OpCodes.Callvirt;
|
|
||||||
return OpCodes.Call;
|
|
||||||
|
|
||||||
case ProxyCreatorType.Newobj:
|
|
||||||
return OpCodes.Newobj;
|
|
||||||
|
|
||||||
default: throw new NotSupportedException();
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
ProxyCreatorInfo getProxyCreatorInfo(FieldReference field) {
|
|
||||||
return methodToInfo.find(fieldToMethod.find(field));
|
|
||||||
}
|
|
||||||
|
|
||||||
uint getRid(ProxyCreatorInfo info, uint magic) {
|
|
||||||
if (info.key != null)
|
|
||||||
return magic ^ info.key.Value;
|
|
||||||
|
|
||||||
if (info.nativeMethod != null) {
|
|
||||||
if (x86emu == null)
|
|
||||||
x86emu = new x86Emulator(new PeImage(fileData));
|
|
||||||
return x86emu.emulate((uint)info.nativeMethod.RVA, magic);
|
|
||||||
}
|
|
||||||
|
|
||||||
throw new NotImplementedException();
|
|
||||||
}
|
|
||||||
|
|
||||||
public void findDelegateCreator() {
|
|
||||||
var type = DotNetUtils.getModuleType(module);
|
|
||||||
if (type == null)
|
|
||||||
return;
|
|
||||||
foreach (var method in type.Methods) {
|
|
||||||
if (!method.IsStatic || method.Body == null)
|
|
||||||
continue;
|
|
||||||
if (!DotNetUtils.isMethod(method, "System.Void", "(System.RuntimeFieldHandle)"))
|
|
||||||
continue;
|
|
||||||
var creatorType = getProxyCreatorType(method);
|
|
||||||
if (creatorType == ProxyCreatorType.None)
|
|
||||||
continue;
|
|
||||||
if (!DotNetUtils.callsMethod(method, "System.Byte[] System.Reflection.Module::ResolveSignature(System.Int32)"))
|
|
||||||
continue;
|
|
||||||
if (!DotNetUtils.callsMethod(method, "System.Reflection.MethodBase System.Reflection.Module::ResolveMethod(System.Int32)"))
|
|
||||||
continue;
|
|
||||||
|
|
||||||
methodToInfo.add(method, createProxyCreatorInfo(method, creatorType));
|
|
||||||
setDelegateCreatorMethod(method);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
static ProxyCreatorType getProxyCreatorType(MethodDefinition method) {
|
|
||||||
foreach (var instr in method.Body.Instructions) {
|
|
||||||
var field = instr.Operand as FieldReference;
|
|
||||||
if (field == null)
|
|
||||||
continue;
|
|
||||||
switch (field.FullName) {
|
|
||||||
case "System.Reflection.Emit.OpCode System.Reflection.Emit.OpCodes::Call":
|
|
||||||
case "System.Reflection.Emit.OpCode System.Reflection.Emit.OpCodes::Callvirt":
|
|
||||||
return ProxyCreatorType.CallOrCallvirt;
|
|
||||||
|
|
||||||
case "System.Reflection.Emit.OpCode System.Reflection.Emit.OpCodes::Newobj":
|
|
||||||
return ProxyCreatorType.Newobj;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return ProxyCreatorType.None;
|
|
||||||
}
|
|
||||||
|
|
||||||
ProxyCreatorInfo createProxyCreatorInfo(MethodDefinition creatorMethod, ProxyCreatorType proxyCreatorType) {
|
|
||||||
simpleDeobfuscator.deobfuscate(creatorMethod, true);
|
|
||||||
var info = new ProxyCreatorInfo(creatorMethod, proxyCreatorType);
|
|
||||||
|
|
||||||
if (!initializeKey(info))
|
|
||||||
throw new NotSupportedException("Couldn't find decryption key");
|
|
||||||
|
|
||||||
if (info.proxyCreatorType == ProxyCreatorType.CallOrCallvirt) {
|
|
||||||
if (!initializeCallvirtChar(info))
|
|
||||||
throw new ApplicationException("Couldn't find callvirt char");
|
|
||||||
}
|
|
||||||
|
|
||||||
return info;
|
|
||||||
}
|
|
||||||
|
|
||||||
bool initializeKey(ProxyCreatorInfo info) {
|
|
||||||
var instrs = info.creatorMethod.Body.Instructions;
|
|
||||||
for (int index = 0; index < instrs.Count; index++) {
|
|
||||||
index = ConfuserUtils.findCallMethod(instrs, index, Code.Callvirt, "System.Reflection.Module System.Reflection.MemberInfo::get_Module()");
|
|
||||||
if (index < 0)
|
|
||||||
break;
|
|
||||||
|
|
||||||
uint key;
|
|
||||||
if (getKey(instrs, index + 1, out key)) {
|
|
||||||
info.key = key;
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
var nativeMethod = getNativeMethod(instrs, index + 1);
|
|
||||||
if (nativeMethod != null) {
|
|
||||||
info.nativeMethod = nativeMethod;
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
static bool getKey(IList<Instruction> instrs, int index, out uint key) {
|
|
||||||
key = 0;
|
|
||||||
if (index + 2 >= instrs.Count)
|
|
||||||
return false;
|
|
||||||
if (!DotNetUtils.isLdloc(instrs[index++]))
|
|
||||||
return false;
|
|
||||||
var ldci4 = instrs[index++];
|
|
||||||
if (!DotNetUtils.isLdcI4(ldci4))
|
|
||||||
return false;
|
|
||||||
if (instrs[index++].OpCode.Code != Code.Xor)
|
|
||||||
return false;
|
|
||||||
|
|
||||||
key = (uint)DotNetUtils.getLdcI4Value(ldci4);
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
static MethodDefinition getNativeMethod(IList<Instruction> instrs, int index) {
|
|
||||||
if (index + 1 >= instrs.Count)
|
|
||||||
return null;
|
|
||||||
if (!DotNetUtils.isLdloc(instrs[index++]))
|
|
||||||
return null;
|
|
||||||
var call = instrs[index++];
|
|
||||||
if (call.OpCode.Code != Code.Call)
|
|
||||||
return null;
|
|
||||||
var calledMethod = call.Operand as MethodDefinition;
|
|
||||||
if (calledMethod == null || calledMethod.Body != null || !calledMethod.IsNative)
|
|
||||||
return null;
|
|
||||||
return calledMethod;
|
|
||||||
}
|
|
||||||
|
|
||||||
bool initializeCallvirtChar(ProxyCreatorInfo info) {
|
|
||||||
var instrs = info.creatorMethod.Body.Instructions;
|
|
||||||
for (int index = 0; index < instrs.Count; index++) {
|
|
||||||
index = ConfuserUtils.findCallMethod(instrs, index, Code.Callvirt, "System.Char System.String::get_Chars(System.Int32)");
|
|
||||||
if (index < 0)
|
|
||||||
break;
|
|
||||||
|
|
||||||
index++;
|
|
||||||
if (index >= instrs.Count)
|
|
||||||
break;
|
|
||||||
|
|
||||||
var ldci4 = instrs[index];
|
|
||||||
if (!DotNetUtils.isLdcI4(ldci4))
|
|
||||||
continue;
|
|
||||||
info.callvirtChar = (ushort)DotNetUtils.getLdcI4Value(ldci4);
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
|
@ -34,6 +34,7 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
ConfuserVersion version = ConfuserVersion.Unknown;
|
ConfuserVersion version = ConfuserVersion.Unknown;
|
||||||
byte[] fileData;
|
byte[] fileData;
|
||||||
x86Emulator x86emu;
|
x86Emulator x86emu;
|
||||||
|
ushort callvirtChar;
|
||||||
|
|
||||||
enum ConfuserVersion {
|
enum ConfuserVersion {
|
||||||
Unknown,
|
Unknown,
|
||||||
|
@ -45,6 +46,8 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
v17_r73740_native,
|
v17_r73740_native,
|
||||||
v17_r74708_normal,
|
v17_r74708_normal,
|
||||||
v17_r74708_native,
|
v17_r74708_native,
|
||||||
|
v18_r75367_normal,
|
||||||
|
v18_r75367_native,
|
||||||
}
|
}
|
||||||
|
|
||||||
enum ProxyCreatorType {
|
enum ProxyCreatorType {
|
||||||
|
@ -59,13 +62,15 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
public readonly ConfuserVersion version;
|
public readonly ConfuserVersion version;
|
||||||
public readonly uint magic;
|
public readonly uint magic;
|
||||||
public readonly MethodDefinition nativeMethod;
|
public readonly MethodDefinition nativeMethod;
|
||||||
|
public readonly ushort callvirtChar;
|
||||||
|
|
||||||
public ProxyCreatorInfo(MethodDefinition creatorMethod, ProxyCreatorType proxyCreatorType, ConfuserVersion version, uint magic, MethodDefinition nativeMethod) {
|
public ProxyCreatorInfo(MethodDefinition creatorMethod, ProxyCreatorType proxyCreatorType, ConfuserVersion version, uint magic, MethodDefinition nativeMethod, ushort callvirtChar) {
|
||||||
this.creatorMethod = creatorMethod;
|
this.creatorMethod = creatorMethod;
|
||||||
this.proxyCreatorType = proxyCreatorType;
|
this.proxyCreatorType = proxyCreatorType;
|
||||||
this.version = version;
|
this.version = version;
|
||||||
this.magic = magic;
|
this.magic = magic;
|
||||||
this.nativeMethod = nativeMethod;
|
this.nativeMethod = nativeMethod;
|
||||||
|
this.callvirtChar = callvirtChar;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -206,6 +211,14 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
getCallInfo_v17_r73740_native(info, creatorInfo, out calledMethod, out callOpcode);
|
getCallInfo_v17_r73740_native(info, creatorInfo, out calledMethod, out callOpcode);
|
||||||
break;
|
break;
|
||||||
|
|
||||||
|
case ConfuserVersion.v18_r75367_normal:
|
||||||
|
getCallInfo_v18_r75367_normal(info, creatorInfo, out calledMethod, out callOpcode);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case ConfuserVersion.v18_r75367_native:
|
||||||
|
getCallInfo_v18_r75367_native(info, creatorInfo, out calledMethod, out callOpcode);
|
||||||
|
break;
|
||||||
|
|
||||||
default:
|
default:
|
||||||
throw new ApplicationException("Unknown version");
|
throw new ApplicationException("Unknown version");
|
||||||
}
|
}
|
||||||
|
@ -366,6 +379,45 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
callOpcode = getCallOpCode(creatorInfo, isCallvirt);
|
callOpcode = getCallOpCode(creatorInfo, isCallvirt);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
void getCallInfo_v18_r75367_normal(DelegateInitInfo info, ProxyCreatorInfo creatorInfo, out MethodReference calledMethod, out OpCode callOpcode) {
|
||||||
|
getCallInfo_v18_r75367(info, creatorInfo, out calledMethod, out callOpcode, (creatorInfo2, magic) => creatorInfo2.magic ^ magic);
|
||||||
|
}
|
||||||
|
|
||||||
|
void getCallInfo_v18_r75367_native(DelegateInitInfo info, ProxyCreatorInfo creatorInfo, out MethodReference calledMethod, out OpCode callOpcode) {
|
||||||
|
getCallInfo_v18_r75367(info, creatorInfo, out calledMethod, out callOpcode, (creatorInfo2, magic) => {
|
||||||
|
if (x86emu == null)
|
||||||
|
x86emu = new x86Emulator(new PeImage(fileData));
|
||||||
|
return x86emu.emulate((uint)creatorInfo2.nativeMethod.RVA, magic);
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
void getCallInfo_v18_r75367(DelegateInitInfo info, ProxyCreatorInfo creatorInfo, out MethodReference calledMethod, out OpCode callOpcode, Func<ProxyCreatorInfo, uint, uint> getRid) {
|
||||||
|
var sig = module.GetSignatureBlob(info.field);
|
||||||
|
int len = sig.Length;
|
||||||
|
uint magic = (uint)((sig[len - 2] << 24) | (sig[len - 3] << 16) | (sig[len - 5] << 8) | sig[len - 6]);
|
||||||
|
uint rid = getRid(creatorInfo, magic);
|
||||||
|
int token = (sig[len - 7] << 24) | (int)rid;
|
||||||
|
uint table = (uint)token >> 24;
|
||||||
|
if (table != 6 && table != 0x0A && table != 0x2B)
|
||||||
|
throw new ApplicationException("Invalid method token");
|
||||||
|
calledMethod = module.LookupToken(token) as MethodReference;
|
||||||
|
callOpcode = getCallOpCode(creatorInfo, info.field);
|
||||||
|
}
|
||||||
|
|
||||||
|
static OpCode getCallOpCode(ProxyCreatorInfo info, FieldDefinition field) {
|
||||||
|
switch (info.proxyCreatorType) {
|
||||||
|
case ProxyCreatorType.CallOrCallvirt:
|
||||||
|
if (field.Name.Length > 0 && field.Name[0] == info.callvirtChar)
|
||||||
|
return OpCodes.Callvirt;
|
||||||
|
return OpCodes.Call;
|
||||||
|
|
||||||
|
case ProxyCreatorType.Newobj:
|
||||||
|
return OpCodes.Newobj;
|
||||||
|
|
||||||
|
default: throw new NotSupportedException();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
// A method token is not a stable value so this method can fail to return the correct method!
|
// A method token is not a stable value so this method can fail to return the correct method!
|
||||||
// There's nothing I can do about that. It's an obfuscator bug. It was fixed in 1.3 r55346.
|
// There's nothing I can do about that. It's an obfuscator bug. It was fixed in 1.3 r55346.
|
||||||
MethodReference createMethodReference(AssemblyNameReference asmRef, uint methodToken) {
|
MethodReference createMethodReference(AssemblyNameReference asmRef, uint methodToken) {
|
||||||
|
@ -413,6 +465,8 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
|
|
||||||
public void findDelegateCreator(ISimpleDeobfuscator simpleDeobfuscator) {
|
public void findDelegateCreator(ISimpleDeobfuscator simpleDeobfuscator) {
|
||||||
var type = DotNetUtils.getModuleType(module);
|
var type = DotNetUtils.getModuleType(module);
|
||||||
|
if (type == null)
|
||||||
|
return;
|
||||||
foreach (var method in type.Methods) {
|
foreach (var method in type.Methods) {
|
||||||
if (method.Body == null || !method.IsStatic || !method.IsAssembly)
|
if (method.Body == null || !method.IsStatic || !method.IsAssembly)
|
||||||
continue;
|
continue;
|
||||||
|
@ -438,6 +492,17 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
else
|
else
|
||||||
theVersion = ConfuserVersion.v14_r58857;
|
theVersion = ConfuserVersion.v14_r58857;
|
||||||
}
|
}
|
||||||
|
else if (!DotNetUtils.callsMethod(method, "System.Byte[] System.Convert::FromBase64String(System.String)") &&
|
||||||
|
DotNetUtils.callsMethod(method, "System.Reflection.MethodBase System.Reflection.Module::ResolveMethod(System.Int32)")) {
|
||||||
|
if (proxyType == ProxyCreatorType.CallOrCallvirt && !findCallvirtChar(method, out callvirtChar))
|
||||||
|
continue;
|
||||||
|
if ((nativeMethod = findNativeMethod_v18_r75367(method)) != null)
|
||||||
|
theVersion = ConfuserVersion.v18_r75367_native;
|
||||||
|
else if (findMagic_v18_r75367(method, out magic))
|
||||||
|
theVersion = ConfuserVersion.v18_r75367_normal;
|
||||||
|
else
|
||||||
|
continue;
|
||||||
|
}
|
||||||
else if (is_v17_r73740(method)) {
|
else if (is_v17_r73740(method)) {
|
||||||
if (DotNetUtils.callsMethod(method, "System.Boolean System.Type::get_IsArray()")) {
|
if (DotNetUtils.callsMethod(method, "System.Boolean System.Type::get_IsArray()")) {
|
||||||
if ((nativeMethod = findNativeMethod_v17_r73740(method)) != null)
|
if ((nativeMethod = findNativeMethod_v17_r73740(method)) != null)
|
||||||
|
@ -458,11 +523,55 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
}
|
}
|
||||||
|
|
||||||
setDelegateCreatorMethod(method);
|
setDelegateCreatorMethod(method);
|
||||||
methodToInfo.add(method, new ProxyCreatorInfo(method, proxyType, theVersion, magic, nativeMethod));
|
methodToInfo.add(method, new ProxyCreatorInfo(method, proxyType, theVersion, magic, nativeMethod, callvirtChar));
|
||||||
version = theVersion;
|
version = theVersion;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static bool findMagic_v18_r75367(MethodDefinition method, out uint magic) {
|
||||||
|
var instrs = method.Body.Instructions;
|
||||||
|
for (int i = 0; i < instrs.Count; i++) {
|
||||||
|
i = ConfuserUtils.findCallMethod(instrs, i, Code.Callvirt, "System.Reflection.Module System.Reflection.MemberInfo::get_Module()");
|
||||||
|
if (i < 0 || i + 3 >= instrs.Count)
|
||||||
|
break;
|
||||||
|
|
||||||
|
if (!DotNetUtils.isLdloc(instrs[i + 1]))
|
||||||
|
continue;
|
||||||
|
var ldci4 = instrs[i + 2];
|
||||||
|
if (!DotNetUtils.isLdcI4(ldci4))
|
||||||
|
continue;
|
||||||
|
if (instrs[i+3].OpCode.Code != Code.Xor)
|
||||||
|
continue;
|
||||||
|
|
||||||
|
magic = (uint)DotNetUtils.getLdcI4Value(ldci4);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
magic = 0;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
static MethodDefinition findNativeMethod_v18_r75367(MethodDefinition method) {
|
||||||
|
var instrs = method.Body.Instructions;
|
||||||
|
for (int i = 0; i < instrs.Count; i++) {
|
||||||
|
i = ConfuserUtils.findCallMethod(instrs, i, Code.Callvirt, "System.Reflection.Module System.Reflection.MemberInfo::get_Module()");
|
||||||
|
if (i < 0 || i + 2 >= instrs.Count)
|
||||||
|
break;
|
||||||
|
|
||||||
|
if (!DotNetUtils.isLdloc(instrs[i + 1]))
|
||||||
|
continue;
|
||||||
|
|
||||||
|
var call = instrs[i + 2];
|
||||||
|
if (call.OpCode.Code != Code.Call)
|
||||||
|
continue;
|
||||||
|
var calledMethod = call.Operand as MethodDefinition;
|
||||||
|
if (calledMethod == null || calledMethod.Body != null || !calledMethod.IsNative)
|
||||||
|
continue;
|
||||||
|
|
||||||
|
return calledMethod;
|
||||||
|
}
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
static bool findMagic_v17_r73740(MethodDefinition method, out uint magic) {
|
static bool findMagic_v17_r73740(MethodDefinition method, out uint magic) {
|
||||||
var instrs = method.Body.Instructions;
|
var instrs = method.Body.Instructions;
|
||||||
for (int i = 0; i < instrs.Count; i++) {
|
for (int i = 0; i < instrs.Count; i++) {
|
||||||
|
@ -743,6 +852,27 @@ namespace de4dot.code.deobfuscators.Confuser {
|
||||||
return foundInvoke ? field : null;
|
return foundInvoke ? field : null;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static bool findCallvirtChar(MethodDefinition method, out ushort callvirtChar) {
|
||||||
|
var instrs = method.Body.Instructions;
|
||||||
|
for (int index = 0; index < instrs.Count; index++) {
|
||||||
|
index = ConfuserUtils.findCallMethod(instrs, index, Code.Callvirt, "System.Char System.String::get_Chars(System.Int32)");
|
||||||
|
if (index < 0)
|
||||||
|
break;
|
||||||
|
|
||||||
|
index++;
|
||||||
|
if (index >= instrs.Count)
|
||||||
|
break;
|
||||||
|
|
||||||
|
var ldci4 = instrs[index];
|
||||||
|
if (!DotNetUtils.isLdcI4(ldci4))
|
||||||
|
continue;
|
||||||
|
callvirtChar = (ushort)DotNetUtils.getLdcI4Value(ldci4);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
callvirtChar = 0;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
public void cleanUp() {
|
public void cleanUp() {
|
||||||
if (!Detected)
|
if (!Detected)
|
||||||
return;
|
return;
|
||||||
|
|
Loading…
Reference in New Issue
Block a user