60 lines
1.6 KiB
C#
60 lines
1.6 KiB
C#
/*
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Copyright (C) 2011 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 Mono.Cecil;
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using de4dot.blocks;
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namespace de4dot.deobfuscators.CryptoObfuscator {
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class TamperDetection {
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ModuleDefinition module;
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TypeDefinition tamperType;
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MethodDefinition tamperMethod;
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public bool Detected {
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get { return tamperMethod != null; }
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}
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public TamperDetection(ModuleDefinition module) {
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this.module = module;
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}
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public void find() {
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var mainMethod = module.EntryPoint;
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if (mainMethod == null)
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return;
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foreach (var info in DotNetUtils.getCalledMethods(module, mainMethod)) {
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var type = info.Item1;
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var method = info.Item2;
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if (!method.IsStatic || !DotNetUtils.isMethod(method, "System.Void", "()"))
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continue;
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if (type.Methods.Count != 3)
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continue;
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if (DotNetUtils.getPInvokeMethod(type, "mscoree", "StrongNameSignatureVerificationEx") == null)
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continue;
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tamperType = type;
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tamperMethod = method;
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return;
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}
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}
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}
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}
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