95 lines
2.5 KiB
C#
95 lines
2.5 KiB
C#
/*
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Copyright (C) 2011-2015 de4dot@gmail.com
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This file is part of de4dot.
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de4dot is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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de4dot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with de4dot. If not, see <http://www.gnu.org/licenses/>.
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*/
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using dnlib.DotNet;
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using de4dot.blocks;
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namespace de4dot.code.deobfuscators.SmartAssembly {
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class MemoryManagerInfo {
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ModuleDefMD module;
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TypeDef memoryManagerType;
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MethodDef attachAppMethod;
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public bool Detected {
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get { return memoryManagerType != null; }
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}
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public TypeDef Type {
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get { return memoryManagerType; }
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}
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public MethodDef CctorInitMethod {
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get { return attachAppMethod; }
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}
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public MemoryManagerInfo(ModuleDefMD module) {
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this.module = module;
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}
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public bool Find() {
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if (CheckCalledMethods(DotNetUtils.GetModuleTypeCctor(module)))
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return true;
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if (CheckCalledMethods(module.EntryPoint))
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return true;
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return false;
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}
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bool CheckCalledMethods(MethodDef checkMethod) {
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if (checkMethod == null)
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return false;
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foreach (var method in DotNetUtils.GetCalledMethods(module, checkMethod)) {
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if (method.Name == ".cctor" || method.Name == ".ctor")
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continue;
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if (!method.IsStatic || !DotNetUtils.IsMethod(method, "System.Void", "()"))
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continue;
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if (CheckMemoryManagerType(method.DeclaringType, method)) {
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memoryManagerType = method.DeclaringType;
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attachAppMethod = method;
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return true;
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}
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}
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return false;
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}
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bool CheckMemoryManagerType(TypeDef type, MethodDef method) {
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// Only two fields: itself and a long
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int fields = 0;
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foreach (var field in type.Fields) {
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if (new SigComparer().Equals(field.FieldType, type) ||
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field.FieldType.FullName == "System.Int64") {
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fields++;
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continue;
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}
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if (DotNetUtils.DerivesFromDelegate(DotNetUtils.GetType(module, field.FieldType)))
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continue;
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return false;
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}
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if (fields != 2)
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return false;
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if (DotNetUtils.GetPInvokeMethod(type, "kernel32", "SetProcessWorkingSetSize") == null)
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return false;
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return true;
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}
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}
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}
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