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Support Confuser 1.7 r75056 constants encrypter

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This commit is contained in:
de4dot 2012-08-07 17:51:43 +02:00
parent 860dd5a0f5
commit 774e2e1880
1 changed files with 41 additions and 2 deletions
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43
de4dot.code/deobfuscators/Confuser/ConstantsDecrypterV17.cs
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@ -19,6 +19,7 @@
using System;
using System.Collections.Generic;
using System.Text;
using Mono.Cecil;
using Mono.Cecil.Cil;
using de4dot.blocks;
@ -28,6 +29,7 @@ namespace de4dot.code.deobfuscators.Confuser {
class ConstantsDecrypterV17 : ConstantsDecrypterBase {
MethodDefinition initMethod;
ConfuserVersion version = ConfuserVersion.Unknown;
string resourceName;
enum ConfuserVersion {
Unknown,
@ -40,6 +42,9 @@ namespace de4dot.code.deobfuscators.Confuser {
v17_r74816_normal,
v17_r74816_dynamic,
v17_r74816_native,
v17_r75056_normal,
v17_r75056_dynamic,
v17_r75056_native,
}
class DecrypterInfoV17 : DecrypterInfo {
@ -97,6 +102,7 @@ namespace de4dot.code.deobfuscators.Confuser {
case ConfuserVersion.v17_r74708_normal:
case ConfuserVersion.v17_r74788_normal:
case ConfuserVersion.v17_r74816_normal:
case ConfuserVersion.v17_r75056_normal:
return findKey4_normal(method, out key);
case ConfuserVersion.v17_r74708_dynamic:
case ConfuserVersion.v17_r74708_native:
@ -104,6 +110,8 @@ namespace de4dot.code.deobfuscators.Confuser {
case ConfuserVersion.v17_r74788_native:
case ConfuserVersion.v17_r74816_dynamic:
case ConfuserVersion.v17_r74816_native:
case ConfuserVersion.v17_r75056_dynamic:
case ConfuserVersion.v17_r75056_native:
return findKey4_other(method, out key);
default:
throw new ApplicationException("Invalid version");
@ -161,6 +169,9 @@ namespace de4dot.code.deobfuscators.Confuser {
case ConfuserVersion.v17_r74816_normal:
case ConfuserVersion.v17_r74816_dynamic:
case ConfuserVersion.v17_r74816_native:
case ConfuserVersion.v17_r75056_normal:
case ConfuserVersion.v17_r75056_dynamic:
case ConfuserVersion.v17_r75056_native:
return findKey5_v17_r74788(method, out key);
default:
key = 0;
@ -218,7 +229,12 @@ namespace de4dot.code.deobfuscators.Confuser {
var method = getDecryptMethod();
if (method == null)
return;
if (DotNetUtils.callsMethod(method, "System.String System.Reflection.Module::get_ScopeName()"))
resourceName = getResourceName(cctor);
if (resourceName != null)
initVersion(method, ConfuserVersion.v17_r75056_normal, ConfuserVersion.v17_r75056_dynamic, ConfuserVersion.v17_r75056_native);
else if (DotNetUtils.callsMethod(method, "System.String System.Reflection.Module::get_ScopeName()"))
initVersion(method, ConfuserVersion.v17_r74816_normal, ConfuserVersion.v17_r74816_dynamic, ConfuserVersion.v17_r74816_native);
else if (DotNetUtils.callsMethod(method, "System.Reflection.Module System.Reflection.Assembly::GetModule(System.String)"))
initVersion(method, ConfuserVersion.v17_r74788_normal, ConfuserVersion.v17_r74788_dynamic, ConfuserVersion.v17_r74788_native);
@ -280,6 +296,9 @@ namespace de4dot.code.deobfuscators.Confuser {
case ConfuserVersion.v17_r74816_normal: return decryptConstant_v17_r74788_normal(info, encrypted, offs, typeCode);
case ConfuserVersion.v17_r74816_dynamic: return decryptConstant_v17_r74788_dynamic(info, encrypted, offs, typeCode);
case ConfuserVersion.v17_r74816_native: return decryptConstant_v17_r74788_native(info, encrypted, offs, typeCode);
case ConfuserVersion.v17_r75056_normal: return decryptConstant_v17_r74788_normal(info, encrypted, offs, typeCode);
case ConfuserVersion.v17_r75056_dynamic: return decryptConstant_v17_r74788_dynamic(info, encrypted, offs, typeCode);
case ConfuserVersion.v17_r75056_native: return decryptConstant_v17_r74788_native(info, encrypted, offs, typeCode);
default:
throw new ApplicationException("Invalid version");
}
@ -314,7 +333,11 @@ namespace de4dot.code.deobfuscators.Confuser {
}
public override void initialize() {
if ((resource = findResource(initMethod)) == null)
if (resourceName != null)
resource = DotNetUtils.getResource(module, resourceName) as EmbeddedResource;
else
resource = findResource(initMethod);
if (resource == null)
throw new ApplicationException("Could not find encrypted consts resource");
findDecrypterInfos();
@ -353,5 +376,21 @@ namespace de4dot.code.deobfuscators.Confuser {
}
return numMethods > 0;
}
static string getResourceName(MethodDefinition method) {
var instrs = method.Body.Instructions;
for (int i = 0; i < instrs.Count; i++) {
i = ConfuserUtils.findCallMethod(instrs, i, Code.Call, "System.Byte[] System.BitConverter::GetBytes(System.Int32)");
if (i < 0)
break;
if (i == 0)
continue;
var ldci4 = instrs[i - 1];
if (!DotNetUtils.isLdcI4(ldci4))
continue;
return Encoding.UTF8.GetString(BitConverter.GetBytes(DotNetUtils.getLdcI4Value(ldci4)));
}
return null;
}
}
}