public bool Execute(DeoxysContext context)
{
PurgeCtor(context);
RemoveDLL(context);
context.Cfg.DeclaringType.Fields.Remove(context.Cfg);
return(true);
}
public bool Execute(DeoxysContext context)
{
//Locating Nasha0,Nasha1,Nasha2 Sections
var peSections = context.PeFile.Sections.Where(q =>
q.Name != ".text" && q.Name != ".rsrc" && q.Name != ".reloc" && q.Name.Contains("0") ||
q.Name.Contains("1") || q.Name.Contains("2")).ToList();
if (!peSections.Any())
{
return(false);
}
if (peSections.Count > 3)
{
peSections = peSections.Where(q => q.Name.Contains("Nasha")).ToList();
}
if (peSections.Count == 3)
{
context.Nasha0 = peSections[0];
context.Logger.Success(
$"Located Nasha Section {context.Nasha0.Name} With Offset {context.Nasha0.Offset}");
context.Nasha1 = peSections[1];
context.Logger.Success(
$"Located Nasha Section {context.Nasha1.Name} With Offset {context.Nasha1.Offset}");
context.Nasha2 = peSections[2];
context.Logger.Success(
$"Located Nasha Section {context.Nasha2.Name} With Offset {context.Nasha2.Offset}");
return(true);
}
return(false);
}
public void RemoveDLL(DeoxysContext context)
{
//Removing the dll reference
var dll = context.Cfg.Signature.FieldType.GetUnderlyingTypeDefOrRef().Scope;
context.Module.AssemblyReferences.Remove(new AssemblyReference(dll.GetAssembly()));
context.Logger.Success($"Successfully Removed DLL {dll.Name}");
}
public void PurgeCtor(DeoxysContext context)
{
//Clearing the .ctor
var ctor = context.Module.GetOrCreateModuleConstructor();
ctor.CilMethodBody = new CilMethodBody(ctor);
ctor.CilMethodBody.Instructions.Add(new CilInstruction(CilOpCodes.Ret));
context.Logger.Success("Purged NashaVM Runtime Initializer");
}
public void RecompileMethods(DeoxysContext context)
{
var recompiler = new NashaRecompiler(context);
foreach (var method in context.DisassembledVirtualizedMethods)
{
//Recompiling each method
recompiler.RecompileMethod(method);
}
}
public List <NashaMethod> DisassembleAllMethods(DeoxysContext context)
{
List <NashaMethod> nashaMethods = new List <NashaMethod>();
var methodDisassembler = new NashaMethodDisassembler(context);
foreach (var method in context.VirtualizedMethods)
{
//Disassembling each method
nashaMethods.Add(methodDisassembler.DisassembleMethod(method));
}
return(nashaMethods);
}
public Devirtualizer(DeoxysContext ctx)
{
Ctx = ctx;
DevirtualizationStages = new List <IDevirtualizationStage>
{
new SectionDetection(),
new CfgDetection(),
new MethodDetection(),
new OpCodeDetection(),
new MethodDisassembly(),
new MethodRecompiler(),
new Cleanup()
};
}
public bool Execute(DeoxysContext context)
{
var extractedOpCodes = ReadOpCodes(context, context.Nasha2.ToArray());
if (extractedOpCodes.Count < 14)
{
return(false);
}
foreach (var opCode in extractedOpCodes)
{
context.DeoxysOpCodes[opCode.RandomValue] = opCode;
}
return(true);
}
public bool Execute(DeoxysContext context)
{
//Nasha injects some methods to initialize the vm
var ctor = context.Module.GetOrCreateModuleConstructor();
var module = ctor.DeclaringType;
if (module.Fields.Count >= 1 && ctor.CilMethodBody.Instructions.Count >= 7)
{
var field = ctor.CilMethodBody.Instructions[1];
if (field.OpCode == CilOpCodes.Stsfld && field.Operand is FieldDefinition fieldDefinition)
{
context.Cfg = fieldDefinition;
context.Logger.Success($"Detected CFG Field [{context.Cfg.Name}] At Constructor {module.Name}");
return(true);
}
}
return(false);
}
private List <NashaOpCode> ReadOpCodes(DeoxysContext context, byte[] opcodeValues)
{
var opCodes = new List <NashaOpCode>();
var reader = new BinaryReader(new MemoryStream(opcodeValues));
reader.BaseStream.Position += 8;
//OpCode scrambling seems to have it's flaws.
while (reader.BaseStream.Position != reader.BaseStream.Length)
{
var opc = ReadOpCode(reader);
if (opc.Code == (NashaCode)777 || opc.Code == (NashaCode)1337) // seems to be the exit code
{
break;
}
opCodes.Add(opc);
context.Logger.Info($"Found OpCode {opc.Code} with Random Value {opc.RandomValue}");
}
return(opCodes);
}
public static void PrintInfo(DeoxysContext Context)
{
foreach (var line in @"
______
| _ \
| | | |___ _____ ___ _ ___
| | | / _ \/ _ \ \/ / | | / __|
| |/ / __/ (_) > <| |_| \__ \
|___/ \___|\___/_/\_\\__, |___/
__/ |
|___/ ".Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries))
{
WriteLineMiddle(line, Color.Red);
}
Console.WriteLine();
WriteLineMiddle($"Version - {CurrentVersion} | https://github.com/StackUnderflowRE/Deoxys", Color.CornflowerBlue);
Console.WriteLine();
Context.Logger.Success($"Loaded file {Context.Module.Name}");
}
private List <NashaOpCode> ReadOpCodes(DeoxysContext context, byte[] opcodeValues)
{
var opCodes = new List <NashaOpCode>();
var reader = new BinaryReader(new MemoryStream(opcodeValues));
reader.BaseStream.Position += 4;
var first = reader.ReadInt32();
//OpCode scrambling seems to have it's flaws.
while (reader.BaseStream.Position != reader.BaseStream.Length)
{
var opc = ReadOpCode(reader);
if (opc.Code > (NashaCode)byte.MaxValue)
{
break;
}
opCodes.Add(opc);
}
var newCodes = new List <NashaOpCode>();
int currentId = first;
for (int i = 0; i < opCodes.Count; i++)
{
if (currentId > byte.MaxValue)
{
break;
}
var opc = opCodes.First(q => q.Code == (NashaCode)currentId);
var newOpCode = new NashaOpCode((NashaCode)i, opc.RandomValue);
newCodes.Add(newOpCode);
context.Logger.Info($"Found OpCode {newOpCode.Code} with Random Value {newOpCode.RandomValue}");
currentId = opc.NextId;
}
return(newCodes);
}
private void MapMethods(DeoxysContext context)
{
foreach (var type in context.Module.GetAllTypes())
{
foreach (var method in type.Methods.Where(q => q.IsIL && q.CilMethodBody.Instructions.Count >= 7))
{
var instructions = method.CilMethodBody.Instructions;
if (instructions.First().OpCode == CilOpCodes.Newobj &&
((IMethodDescriptor)instructions.First().Operand).DeclaringType !=
context.Cfg.Signature.FieldType.GetUnderlyingTypeDefOrRef())
{
var instructionField = instructions.First(q => q.OpCode == CilOpCodes.Ldsfld);
if (instructionField != null)
{
var index = instructions.IndexOf(instructionField);
var methodKey = instructions[index - 1].GetLdcI4Constant();
context.VirtualizedMethods.Add(new NashaMethodInfo(method, methodKey));
context.Logger.Success($"Found Virtualized Method {method.Name} With Key {methodKey}");
}
}
}
}
}
public static void Main(string[] args)
{
Console.Title = $"Deoxys - Version {CurrentVersion} | https://github.com/StackUnderflowRE/Deoxys";
ILogger logger = new ConsoleLogger();
if (args.Length == 0)
{
logger.Error("Use <Deoxys.exe> --help");
Console.ReadLine();
return;
}
var options = Parser.Default.ParseArguments <ParseOptions>(args).WithNotParsed(q =>
{
logger.Info($"Usage : <Deoxys.exe> <Input File> <Settings>");
Console.ReadLine();
Environment.Exit(0);
});
var deoxysOptions = new DeoxysOptions(args[0], options.Value);
var ctx = new DeoxysContext(deoxysOptions, logger);
PrintInfo(ctx);
var devirtualizer = new Devirtualizer(ctx);
bool result = devirtualizer.Devirtualize();
if (result)
{
devirtualizer.Save();
logger.Success("Finished Devirtualization With No Errors!");
}
else
{
logger.Error("Could not finish Devirtualization.");
}
Console.ReadLine();
}
public NashaMethodDisassembler(DeoxysContext context)
{
Context = context;
InstructionDisassembler = new NashaInstructionDisassembler(this);
}
public bool Execute(DeoxysContext context)
{
PurgeCtor(context);
RemoveDLL(context);
return(true);
}
public NashaRecompiler(DeoxysContext context)
{
Context = context;
}
public bool Execute(DeoxysContext context)
{
MapMethods(context);
return(context.VirtualizedMethods.Count != 0);
}
public NashaOperandResolver(DeoxysContext context)
{
Context = context;
}
public bool Execute(DeoxysContext context)
{
RecompileMethods(context);
return(true);
}
public bool Execute(DeoxysContext context)
{
context.DisassembledVirtualizedMethods = DisassembleAllMethods(context);
return(context.DisassembledVirtualizedMethods.Count == context.VirtualizedMethods.Count);
}
