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Support old CW 2.x

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This commit is contained in:
de4dot 2012-05-27 02:31:24 +02:00
parent baddb63d32
commit eebb090827
1 changed files with 39 additions and 8 deletions
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47
de4dot.code/deobfuscators/CodeWall/AssemblyDecrypter.cs
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@ -37,6 +37,7 @@ namespace de4dot.code.deobfuscators.CodeWall {
string resourcePassword;
string resourceSalt;
EmbeddedResource assemblyResource;
ModuleDefinition resourceModule;
public class AssemblyInfo {
public readonly byte[] data;
@ -68,10 +69,6 @@ namespace de4dot.code.deobfuscators.CodeWall {
this.deob = deob;
}
static readonly string[] requiredLocals = new string[] {
"System.AppDomain",
"System.DateTime",
};
public void find() {
var method = module.EntryPoint;
if (!checkEntryPoint(method))
@ -83,7 +80,8 @@ namespace de4dot.code.deobfuscators.CodeWall {
return;
deobfuscateAll(decryptAssemblyMethod);
var resource = getResource(decryptAssemblyMethod);
ModuleDefinition theResourceModule;
var resource = getResource(decryptAssemblyMethod, out theResourceModule);
if (resource == null)
return;
string password, salt;
@ -94,9 +92,14 @@ namespace de4dot.code.deobfuscators.CodeWall {
resourcePassword = password;
resourceSalt = salt;
assemblyResource = resource;
resourceModule = theResourceModule;
decryptAllAssemblies();
}
static readonly string[] requiredLocals = new string[] {
"System.AppDomain",
"System.DateTime",
};
bool checkEntryPoint(MethodDefinition method) {
if (method == null)
return false;
@ -152,15 +155,43 @@ namespace de4dot.code.deobfuscators.CodeWall {
return null;
}
EmbeddedResource getResource(MethodDefinition method) {
EmbeddedResource getResource(MethodDefinition method, out ModuleDefinition theResourceModule) {
string resourceDllFileName = null;
theResourceModule = module;
foreach (var s in DotNetUtils.getCodeStrings(method)) {
var resource = DotNetUtils.getResource(module, s + ".resources") as EmbeddedResource;
if (s.Length > 0 && s[0] == '\\')
resourceDllFileName = s;
var resource = DotNetUtils.getResource(theResourceModule, s + ".resources") as EmbeddedResource;
if (resource != null)
return resource;
}
if (resourceDllFileName == null)
return null;
// Here if CW 2.x
theResourceModule = getResourceModule(resourceDllFileName);
if (theResourceModule == null)
return null;
foreach (var s in DotNetUtils.getCodeStrings(method)) {
var resource = DotNetUtils.getResource(theResourceModule, s + ".resources") as EmbeddedResource;
if (resource != null)
return resource;
}
theResourceModule = null;
return null;
}
ModuleDefinition getResourceModule(string name) {
try {
var resourceDllFileName = Path.Combine(Path.GetDirectoryName(module.FullyQualifiedName), name.Substring(1));
return ModuleDefinition.ReadModule(resourceDllFileName);
}
catch {
return null;
}
}
bool getPassword(MethodDefinition method, out string password, out string salt) {
var instrs = method.Body.Instructions;
for (int i = 0; i < instrs.Count - 1; i++) {
@ -186,7 +217,7 @@ namespace de4dot.code.deobfuscators.CodeWall {
void decryptAllAssemblies() {
if (assemblyResource == null)
return;
var resourceSet = ResourceReader.read(module, assemblyResource.GetResourceStream());
var resourceSet = ResourceReader.read(resourceModule, assemblyResource.GetResourceStream());
foreach (var resourceElement in resourceSet.ResourceElements) {
if (resourceElement.ResourceData.Code != ResourceTypeCode.ByteArray)
throw new ApplicationException("Invalid resource");