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-ASM version set to 6.0, since javavm uses 6.0 -Obscure bug with MethodExecutor
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145 changes: 145 additions & 0 deletions
145
...main/java/com/javadeobfuscator/deobfuscator/transformers/special/BisGuardTransformer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| /* | ||
| * Copyright 2018 Sam Sun <[email protected]> | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package com.javadeobfuscator.deobfuscator.transformers.special; | ||
|
|
||
| import java.util.Collections; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.Map.Entry; | ||
| import java.util.concurrent.atomic.AtomicInteger; | ||
|
|
||
| import org.objectweb.asm.Opcodes; | ||
| import org.objectweb.asm.tree.ClassNode; | ||
| import org.objectweb.asm.tree.InsnNode; | ||
| import org.objectweb.asm.tree.MethodInsnNode; | ||
| import org.objectweb.asm.tree.MethodNode; | ||
| import org.objectweb.asm.tree.VarInsnNode; | ||
|
|
||
| import com.javadeobfuscator.deobfuscator.config.*; | ||
| import com.javadeobfuscator.deobfuscator.exceptions.*; | ||
| import com.javadeobfuscator.deobfuscator.transformers.*; | ||
| import com.javadeobfuscator.deobfuscator.utils.TransformerHelper; | ||
| import com.javadeobfuscator.javavm.MethodExecution; | ||
| import com.javadeobfuscator.javavm.VirtualMachine; | ||
| import com.javadeobfuscator.javavm.mirrors.JavaClass; | ||
| import com.javadeobfuscator.javavm.utils.ArrayConversionHelper; | ||
| import com.javadeobfuscator.javavm.values.JavaWrapper; | ||
|
|
||
| public class BisGuardTransformer extends Transformer<TransformerConfig> | ||
| { | ||
| @Override | ||
| public boolean transform() throws WrongTransformerException | ||
| { | ||
| VirtualMachine vm = TransformerHelper.newVirtualMachine(this); | ||
| AtomicInteger count = new AtomicInteger(); | ||
| System.out.println("[Special] [BisGuardTransformer] Starting"); | ||
| ClassNode loader = classNodes().stream().filter(c -> c.name.equals("JavaPreloader")).findFirst().orElse(null); | ||
| MethodNode getCipher = loader == null ? null : loader.methods.stream().filter(m -> m.name.equals("getCipher") | ||
| && m.desc.equals("([B)LJavaPreloader$Cipher;")).findFirst().orElse(null); | ||
| ClassNode cipher = classNodes().stream().filter(c -> c.name.equals("JavaPreloader$Cipher")).findFirst().orElse(null); | ||
| MethodNode decrypt = cipher == null ? null : cipher.methods.stream().filter(m -> m.name.equals("decrypt") | ||
| && m.desc.equals("([B)V")).findFirst().orElse(null); | ||
| if(getCipher != null && decrypt != null) | ||
| { | ||
| MethodNode init = new MethodNode(Opcodes.ACC_PUBLIC, "<init>", "(I)V", null, null); | ||
| init.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0)); | ||
| init.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false)); | ||
| init.instructions.add(new InsnNode(Opcodes.RETURN)); | ||
| loader.methods.add(init); | ||
| JavaWrapper instance = vm.newInstance(JavaClass.forName(vm, "JavaPreloader"), "(I)V", vm.newInt(0)); | ||
| loader.methods.remove(init); | ||
| MethodExecution cipherInstance = vm.execute(loader, getCipher, instance, Collections.<JavaWrapper>singletonList( | ||
| vm.getNull())); | ||
| boolean contains = getDeobfuscator().getInputPassthrough().containsKey("JavaSerialNo.class"); | ||
| byte[] decryptionKey = null; | ||
| if(contains) | ||
| { | ||
| byte[] data = getDeobfuscator().getInputPassthrough().get("JavaSerialNo.class"); | ||
| JavaWrapper byteArr = ArrayConversionHelper.convertByteArray(vm, data); | ||
| vm.execute(cipher, decrypt, cipherInstance.getReturnValue(), Collections.<JavaWrapper>singletonList(byteArr)); | ||
| byte[] b = ArrayConversionHelper.convertByteArray(byteArr.asArray()); | ||
| getDeobfuscator().getInputPassthrough().remove("JavaSerialNo.class"); | ||
| getDeobfuscator().loadInput("JavaSerialNo.class", b); | ||
| ClassNode cn = classNodes().stream().filter(c -> c.name.equals("JavaSerialNo")).findFirst().orElse(null); | ||
| MethodNode serialBytes = cn.methods.stream().filter(m -> m.name.equals("toSerialNoBytes")).findFirst().orElse(null); | ||
| MethodExecution execution = vm.execute(cn, serialBytes); | ||
| String res = vm.convertJavaObjectToString(execution.getReturnValue()); | ||
| //Convert to decryption key | ||
| MethodNode hex2Bytes = loader.methods.stream().filter(m -> m.name.equals("hexToBytes")).findFirst().orElse(null); | ||
| MethodExecution execution2 = vm.execute(loader, hex2Bytes, instance, Collections.<JavaWrapper>singletonList( | ||
| vm.getString(res))); | ||
| cipherInstance = vm.execute(loader, getCipher, instance, Collections.<JavaWrapper>singletonList( | ||
| vm.getNull())); | ||
| decryptionKey = ArrayConversionHelper.convertByteArray(execution2.getReturnValue().asArray()); | ||
| JavaWrapper byteArr1 = ArrayConversionHelper.convertByteArray(vm, decryptionKey); | ||
| vm.execute(cipher, decrypt, cipherInstance.getReturnValue(), Collections.<JavaWrapper>singletonList(byteArr1)); | ||
| decryptionKey = ArrayConversionHelper.convertByteArray(byteArr1.asArray()); | ||
| cipherInstance = vm.execute(loader, getCipher, instance, Collections.<JavaWrapper>singletonList( | ||
| ArrayConversionHelper.convertByteArray(vm, decryptionKey))); | ||
| } | ||
| Map<String, byte[]> decrypted = new HashMap<>(); | ||
| for(Entry<String, byte[]> passthrough : getDeobfuscator().getInputPassthrough().entrySet()) | ||
| if(passthrough.getKey().endsWith(".class")) | ||
| { | ||
| byte[] data = passthrough.getValue(); | ||
| if(data[0] != -54 || data[1] != -2 || data[2] != -70 || data[3] != -66) | ||
| { | ||
| cipherInstance = vm.execute(loader, getCipher, instance, Collections.<JavaWrapper>singletonList( | ||
| decryptionKey == null ? vm.getNull() : ArrayConversionHelper.convertByteArray(vm, decryptionKey))); | ||
| JavaWrapper byteArr = ArrayConversionHelper.convertByteArray(vm, data); | ||
| vm.execute(cipher, decrypt, cipherInstance.getReturnValue(), Collections.<JavaWrapper>singletonList(byteArr)); | ||
| byte[] b = ArrayConversionHelper.convertByteArray(byteArr.asArray()); | ||
| decrypted.put(passthrough.getKey(), b); | ||
| count.getAndIncrement(); | ||
| } | ||
| } | ||
| for(Entry<String, byte[]> entry : decrypted.entrySet()) | ||
| { | ||
| getDeobfuscator().getInputPassthrough().remove(entry.getKey()); | ||
| getDeobfuscator().loadInput(entry.getKey(), entry.getValue()); | ||
| } | ||
| //Delete all class files related to encryption | ||
| classNodes().removeIf(c -> c.name.equals("JavaPreloader$1") || c.name.equals("JavaPreloader$2") | ||
| || c.name.equals("JavaPreloader$3") || c.name.equals("JavaPreloader$Cipher") | ||
| || c.name.equals("JavaPreloader$KlassLoader") || c.name.equals("JavaPreloader$Loader") | ||
| || c.name.equals("JavaPreloader$Protected") || c.name.equals("JavaPreloader") | ||
| || c.name.equals("JavaSerialNo") || c.name.equals("SerialNoClass") | ||
| || c.name.equals("com/bisguard/utils/Authenticator")); | ||
| //Set Main-Class to Subordinate-Class | ||
| String realMain = null; | ||
| int index = -1; | ||
| String[] lines = new String(getDeobfuscator().getInputPassthrough().get("META-INF/MANIFEST.MF")).split("\n"); | ||
| for(int i = 0; i < lines.length; i++) | ||
| { | ||
| String line = lines[i]; | ||
| if(line.startsWith("Subordinate-Class: ")) | ||
| realMain = line.replace("Subordinate-Class: ", ""); | ||
| else if(line.startsWith("Main-Class: ")) | ||
| index = i; | ||
| } | ||
| lines[index] = "Main-Class: " + realMain; | ||
| String res = ""; | ||
| for(String line : lines) | ||
| res += line + "\n"; | ||
| res = res.substring(0, res.length() - 2); | ||
| getDeobfuscator().getInputPassthrough().put("META-INF/MANIFEST.MF", res.getBytes()); | ||
| } | ||
| System.out.println("[Special] [BisGuardTransformer] Decrypted " + count.get() + " classes"); | ||
| System.out.println("[Special] [BisGuardTransformer] Done"); | ||
| return count.get() > 0; | ||
| } | ||
| } |
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