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feat: Add logic stub and support for Memory CRC protection in Ryujin-protected binaries

Browse Source 
- Implemented support for CRC-based memory protection stub.
- Improved CRC algorithm for better uniqueness and robustness.
- Added capability for Ryujin to store CRC from the .ryujin section into section header fields.
- Bug fixes and updated documentation.
This commit is contained in:
keowu
2025-07-24 21:10:27 -03:00
parent 0988e8e078
commit b8a571871d
6 changed files with 296 additions and 58 deletions
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284
RyujinCore/Ryujin/RyujinCore/RyujinObfuscationCore.cc
View File

@@ -1927,7 +1927,7 @@ void RyujinObfuscationCore::insertAntiDump() {
const auto pOpcodeBuffer = opcodeBuffer.data();
antidump_instructions.reserve(opcodeBuffer.size());
// Storing our new opcodes for antidebug detection
// Storing our new opcodes for antidump detection
for (auto i = 0; i < opcodeBuffer.size(); ++i) antidump_instructions.push_back(static_cast<ZyanU8>(pOpcodeBuffer[i]));
// Saving the opcode block
@@ -1943,11 +1943,259 @@ void RyujinObfuscationCore::insertAntiDump() {
void RyujinObfuscationCore::insertMemoryProtection() {
unsigned char ucTest[]{ 0xDE, 0xAD, 0xBE, 0xEF };
BOOL isInserted{ FALSE };
RyujinCRC32Utils crcTest;
std::printf("RyujinObfuscationCore::insertMemoryProtection.TEST: 0x%X\n", crcTest.crc32(ucTest, 4));
for (auto& block : m_proc.basic_blocks) {
for (auto& instr : block.instructions) {
if (isInserted) break;
if (!isInserted) {
auto block_info = findBlockId(instr.instruction.info.opcode, instr.instruction.operands[1].imm.value.u, 2, sizeof(unsigned char));
if (block_info.first == -1 || block_info.second == -1) continue;
auto& data = m_proc.basic_blocks[block_info.first].opcodes[block_info.second];
asmjit::JitRuntime runtime;
asmjit::CodeHolder code;
code.init(runtime.environment());
asmjit::x86::Assembler a(&code);
// First, saving the states
// Push flags
a.pushfq();
// Push regs
a.push(asmjit::x86::rax);
a.push(asmjit::x86::rcx);
a.push(asmjit::x86::rdx);
a.push(asmjit::x86::rbx);
a.push(asmjit::x86::rbp);
a.push(asmjit::x86::rsi);
a.push(asmjit::x86::rdi);
a.push(asmjit::x86::r8);
a.push(asmjit::x86::r9);
a.push(asmjit::x86::r10);
a.push(asmjit::x86::r11);
a.push(asmjit::x86::r12);
a.push(asmjit::x86::r13);
a.push(asmjit::x86::r14);
a.push(asmjit::x86::r15);
std::vector<unsigned char> memoryProtectionShellcode = {
/*
TODO
*/
0x48, 0x81, 0xEC, 0x58, 0x01, 0x00, 0x00, 0x65, 0x48, 0x8B, 0x04, 0x25,
0x60, 0x00, 0x00, 0x00, 0x48, 0x89, 0x84, 0x24, 0x80, 0x00, 0x00, 0x00,
0x48, 0x83, 0xBC, 0x24, 0x80, 0x00, 0x00, 0x00, 0x00, 0x74, 0x1E, 0x48,
0x8B, 0x84, 0x24, 0x80, 0x00, 0x00, 0x00, 0x48, 0x83, 0x78, 0x10, 0x00,
0x74, 0x0F, 0x48, 0x8B, 0x84, 0x24, 0x80, 0x00, 0x00, 0x00, 0x48, 0x83,
0x78, 0x18, 0x00, 0x75, 0x05, 0xE9, 0x16, 0x07, 0x00, 0x00, 0x48, 0x8B,
0x84, 0x24, 0x80, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x40, 0x10, 0x48, 0x89,
0x84, 0x24, 0xE8, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0xE8, 0x00,
0x00, 0x00, 0x48, 0x89, 0x84, 0x24, 0x00, 0x01, 0x00, 0x00, 0x48, 0x8B,
0x84, 0x24, 0x00, 0x01, 0x00, 0x00, 0x0F, 0xB7, 0x00, 0x3D, 0x4D, 0x5A,
0x00, 0x00, 0x74, 0x05, 0xE9, 0xDB, 0x06, 0x00, 0x00, 0x48, 0x8B, 0x84,
0x24, 0x00, 0x01, 0x00, 0x00, 0x48, 0x63, 0x40, 0x3C, 0x48, 0x8B, 0x8C,
0x24, 0xE8, 0x00, 0x00, 0x00, 0x48, 0x03, 0xC8, 0x48, 0x8B, 0xC1, 0x48,
0x89, 0x84, 0x24, 0xA0, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0xA0,
0x00, 0x00, 0x00, 0x81, 0x38, 0x50, 0x45, 0x00, 0x00, 0x74, 0x05, 0xE9,
0xA4, 0x06, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0xA0, 0x00, 0x00, 0x00,
0x0F, 0xB7, 0x40, 0x14, 0x48, 0x8B, 0x8C, 0x24, 0xA0, 0x00, 0x00, 0x00,
0x48, 0x8D, 0x44, 0x01, 0x18, 0x48, 0x89, 0x84, 0x24, 0xA8, 0x00, 0x00,
0x00, 0x48, 0x8B, 0x84, 0x24, 0xA0, 0x00, 0x00, 0x00, 0x0F, 0xB7, 0x40,
0x06, 0x89, 0x84, 0x24, 0xF8, 0x00, 0x00, 0x00, 0xC6, 0x44, 0x24, 0x50,
0x2E, 0xC6, 0x44, 0x24, 0x51, 0x52, 0xC6, 0x44, 0x24, 0x52, 0x79, 0xC6,
0x44, 0x24, 0x53, 0x75, 0xC6, 0x44, 0x24, 0x54, 0x6A, 0xC6, 0x44, 0x24,
0x55, 0x69, 0xC6, 0x44, 0x24, 0x56, 0x6E, 0xC6, 0x44, 0x24, 0x57, 0x00,
0x48, 0xC7, 0x84, 0x24, 0x98, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xC7, 0x44, 0x24, 0x78, 0x00, 0x00, 0x00, 0x00, 0xEB, 0x1E, 0x8B, 0x44,
0x24, 0x78, 0xFF, 0xC0, 0x89, 0x44, 0x24, 0x78, 0x48, 0x8B, 0x84, 0x24,
0xA8, 0x00, 0x00, 0x00, 0x48, 0x83, 0xC0, 0x28, 0x48, 0x89, 0x84, 0x24,
0xA8, 0x00, 0x00, 0x00, 0x8B, 0x84, 0x24, 0xF8, 0x00, 0x00, 0x00, 0x39,
0x44, 0x24, 0x78, 0x7D, 0x68, 0xC6, 0x44, 0x24, 0x20, 0x01, 0xC7, 0x44,
0x24, 0x2C, 0x00, 0x00, 0x00, 0x00, 0xEB, 0x0A, 0x8B, 0x44, 0x24, 0x2C,
0xFF, 0xC0, 0x89, 0x44, 0x24, 0x2C, 0x83, 0x7C, 0x24, 0x2C, 0x08, 0x7D,
0x28, 0x48, 0x63, 0x44, 0x24, 0x2C, 0x48, 0x8B, 0x8C, 0x24, 0xA8, 0x00,
0x00, 0x00, 0x0F, 0xB6, 0x04, 0x01, 0x48, 0x63, 0x4C, 0x24, 0x2C, 0x0F,
0xBE, 0x4C, 0x0C, 0x50, 0x3B, 0xC1, 0x74, 0x07, 0xC6, 0x44, 0x24, 0x20,
0x00, 0xEB, 0x02, 0xEB, 0xC7, 0x0F, 0xB6, 0x44, 0x24, 0x20, 0x85, 0xC0,
0x74, 0x12, 0x48, 0x8B, 0x84, 0x24, 0xA8, 0x00, 0x00, 0x00, 0x48, 0x89,
0x84, 0x24, 0x98, 0x00, 0x00, 0x00, 0xEB, 0x05, 0xE9, 0x6D, 0xFF, 0xFF,
0xFF, 0x48, 0x83, 0xBC, 0x24, 0x98, 0x00, 0x00, 0x00, 0x00, 0x75, 0x05,
0xE9, 0x8F, 0x05, 0x00, 0x00, 0xB8, 0x6E, 0x00, 0x00, 0x00, 0x66, 0x89,
0x84, 0x24, 0xC8, 0x00, 0x00, 0x00, 0xB8, 0x74, 0x00, 0x00, 0x00, 0x66,
0x89, 0x84, 0x24, 0xCA, 0x00, 0x00, 0x00, 0xB8, 0x64, 0x00, 0x00, 0x00,
0x66, 0x89, 0x84, 0x24, 0xCC, 0x00, 0x00, 0x00, 0xB8, 0x6C, 0x00, 0x00,
0x00, 0x66, 0x89, 0x84, 0x24, 0xCE, 0x00, 0x00, 0x00, 0xB8, 0x6C, 0x00,
0x00, 0x00, 0x66, 0x89, 0x84, 0x24, 0xD0, 0x00, 0x00, 0x00, 0xB8, 0x2E,
0x00, 0x00, 0x00, 0x66, 0x89, 0x84, 0x24, 0xD2, 0x00, 0x00, 0x00, 0xB8,
0x64, 0x00, 0x00, 0x00, 0x66, 0x89, 0x84, 0x24, 0xD4, 0x00, 0x00, 0x00,
0xB8, 0x6C, 0x00, 0x00, 0x00, 0x66, 0x89, 0x84, 0x24, 0xD6, 0x00, 0x00,
0x00, 0xB8, 0x6C, 0x00, 0x00, 0x00, 0x66, 0x89, 0x84, 0x24, 0xD8, 0x00,
0x00, 0x00, 0x33, 0xC0, 0x66, 0x89, 0x84, 0x24, 0xDA, 0x00, 0x00, 0x00,
0xC6, 0x44, 0x24, 0x58, 0x4E, 0xC6, 0x44, 0x24, 0x59, 0x74, 0xC6, 0x44,
0x24, 0x5A, 0x54, 0xC6, 0x44, 0x24, 0x5B, 0x65, 0xC6, 0x44, 0x24, 0x5C,
0x72, 0xC6, 0x44, 0x24, 0x5D, 0x6D, 0xC6, 0x44, 0x24, 0x5E, 0x69, 0xC6,
0x44, 0x24, 0x5F, 0x6E, 0xC6, 0x44, 0x24, 0x60, 0x61, 0xC6, 0x44, 0x24,
0x61, 0x74, 0xC6, 0x44, 0x24, 0x62, 0x65, 0xC6, 0x44, 0x24, 0x63, 0x50,
0xC6, 0x44, 0x24, 0x64, 0x72, 0xC6, 0x44, 0x24, 0x65, 0x6F, 0xC6, 0x44,
0x24, 0x66, 0x63, 0xC6, 0x44, 0x24, 0x67, 0x65, 0xC6, 0x44, 0x24, 0x68,
0x73, 0xC6, 0x44, 0x24, 0x69, 0x73, 0xC6, 0x44, 0x24, 0x6A, 0x00, 0x48,
0xC7, 0x44, 0x24, 0x38, 0x00, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24,
0x80, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x40, 0x18, 0x48, 0x8B, 0x40, 0x28,
0x48, 0x89, 0x84, 0x24, 0xB0, 0x00, 0x00, 0x00, 0xEB, 0x13, 0x48, 0x8B,
0x84, 0x24, 0xB0, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x00, 0x48, 0x89, 0x84,
0x24, 0xB0, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0x80, 0x00, 0x00,
0x00, 0x48, 0x8B, 0x40, 0x18, 0x48, 0x83, 0xC0, 0x28, 0x48, 0x39, 0x84,
0x24, 0xB0, 0x00, 0x00, 0x00, 0x0F, 0x84, 0x6D, 0x01, 0x00, 0x00, 0x48,
0x8B, 0x84, 0x24, 0xB0, 0x00, 0x00, 0x00, 0x48, 0x83, 0xE8, 0x10, 0x48,
0x89, 0x84, 0x24, 0xE0, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0xE0,
0x00, 0x00, 0x00, 0x48, 0x83, 0x78, 0x60, 0x00, 0x75, 0x02, 0xEB, 0xAA,
0x48, 0x8B, 0x84, 0x24, 0xE0, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x40, 0x60,
0x48, 0x89, 0x44, 0x24, 0x48, 0x48, 0x8D, 0x84, 0x24, 0xC8, 0x00, 0x00,
0x00, 0x48, 0x89, 0x44, 0x24, 0x40, 0xC6, 0x44, 0x24, 0x21, 0x01, 0xEB,
0x1C, 0x48, 0x8B, 0x44, 0x24, 0x40, 0x48, 0x83, 0xC0, 0x02, 0x48, 0x89,
0x44, 0x24, 0x40, 0x48, 0x8B, 0x44, 0x24, 0x48, 0x48, 0x83, 0xC0, 0x02,
0x48, 0x89, 0x44, 0x24, 0x48, 0x48, 0x8B, 0x44, 0x24, 0x40, 0x0F, 0xB7,
0x00, 0x85, 0xC0, 0x0F, 0x84, 0xBE, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x44,
0x24, 0x48, 0x0F, 0xB7, 0x00, 0x85, 0xC0, 0x0F, 0x84, 0xAE, 0x00, 0x00,
0x00, 0x48, 0x8B, 0x44, 0x24, 0x48, 0x0F, 0xB7, 0x00, 0x83, 0xF8, 0x41,
0x7C, 0x21, 0x48, 0x8B, 0x44, 0x24, 0x48, 0x0F, 0xB7, 0x00, 0x83, 0xF8,
0x5A, 0x7F, 0x14, 0x48, 0x8B, 0x44, 0x24, 0x48, 0x0F, 0xB7, 0x00, 0x83,
0xC0, 0x20, 0x89, 0x84, 0x24, 0x88, 0x00, 0x00, 0x00, 0xEB, 0x0F, 0x48,
0x8B, 0x44, 0x24, 0x48, 0x0F, 0xB7, 0x00, 0x89, 0x84, 0x24, 0x88, 0x00,
0x00, 0x00, 0x0F, 0xB7, 0x84, 0x24, 0x88, 0x00, 0x00, 0x00, 0x66, 0x89,
0x44, 0x24, 0x70, 0x48, 0x8B, 0x44, 0x24, 0x40, 0x0F, 0xB7, 0x00, 0x83,
0xF8, 0x41, 0x7C, 0x21, 0x48, 0x8B, 0x44, 0x24, 0x40, 0x0F, 0xB7, 0x00,
0x83, 0xF8, 0x5A, 0x7F, 0x14, 0x48, 0x8B, 0x44, 0x24, 0x40, 0x0F, 0xB7,
0x00, 0x83, 0xC0, 0x20, 0x89, 0x84, 0x24, 0x8C, 0x00, 0x00, 0x00, 0xEB,
0x0F, 0x48, 0x8B, 0x44, 0x24, 0x40, 0x0F, 0xB7, 0x00, 0x89, 0x84, 0x24,
0x8C, 0x00, 0x00, 0x00, 0x0F, 0xB7, 0x84, 0x24, 0x8C, 0x00, 0x00, 0x00,
0x66, 0x89, 0x44, 0x24, 0x74, 0x0F, 0xB7, 0x44, 0x24, 0x70, 0x0F, 0xB7,
0x4C, 0x24, 0x74, 0x3B, 0xC1, 0x74, 0x07, 0xC6, 0x44, 0x24, 0x21, 0x00,
0xEB, 0x05, 0xE9, 0x16, 0xFF, 0xFF, 0xFF, 0x0F, 0xB6, 0x44, 0x24, 0x21,
0x85, 0xC0, 0x74, 0x2B, 0x48, 0x8B, 0x44, 0x24, 0x40, 0x0F, 0xB7, 0x00,
0x85, 0xC0, 0x75, 0x1F, 0x48, 0x8B, 0x44, 0x24, 0x48, 0x0F, 0xB7, 0x00,
0x85, 0xC0, 0x75, 0x13, 0x48, 0x8B, 0x84, 0x24, 0xE0, 0x00, 0x00, 0x00,
0x48, 0x8B, 0x40, 0x30, 0x48, 0x89, 0x44, 0x24, 0x38, 0xEB, 0x05, 0xE9,
0x62, 0xFE, 0xFF, 0xFF, 0x48, 0x83, 0x7C, 0x24, 0x38, 0x00, 0x75, 0x05,
0xE9, 0xE3, 0x02, 0x00, 0x00, 0x48, 0x8B, 0x44, 0x24, 0x38, 0x48, 0x89,
0x84, 0x24, 0x18, 0x01, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0x18, 0x01,
0x00, 0x00, 0x48, 0x63, 0x40, 0x3C, 0x48, 0x8B, 0x4C, 0x24, 0x38, 0x48,
0x03, 0xC8, 0x48, 0x8B, 0xC1, 0x48, 0x89, 0x84, 0x24, 0x20, 0x01, 0x00,
0x00, 0xB8, 0x08, 0x00, 0x00, 0x00, 0x48, 0x6B, 0xC0, 0x00, 0x48, 0x8B,
0x8C, 0x24, 0x20, 0x01, 0x00, 0x00, 0x48, 0x8D, 0x84, 0x01, 0x88, 0x00,
0x00, 0x00, 0x48, 0x89, 0x84, 0x24, 0x08, 0x01, 0x00, 0x00, 0x48, 0x8B,
0x84, 0x24, 0x08, 0x01, 0x00, 0x00, 0x83, 0x38, 0x00, 0x75, 0x05, 0xE9,
0x84, 0x02, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0x08, 0x01, 0x00, 0x00,
0x8B, 0x00, 0x48, 0x8B, 0x4C, 0x24, 0x38, 0x48, 0x03, 0xC8, 0x48, 0x8B,
0xC1, 0x48, 0x89, 0x84, 0x24, 0xB8, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x84,
0x24, 0xB8, 0x00, 0x00, 0x00, 0x8B, 0x40, 0x20, 0x48, 0x8B, 0x4C, 0x24,
0x38, 0x48, 0x03, 0xC8, 0x48, 0x8B, 0xC1, 0x48, 0x89, 0x84, 0x24, 0x28,
0x01, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0xB8, 0x00, 0x00, 0x00, 0x8B,
0x40, 0x24, 0x48, 0x8B, 0x4C, 0x24, 0x38, 0x48, 0x03, 0xC8, 0x48, 0x8B,
0xC1, 0x48, 0x89, 0x84, 0x24, 0x30, 0x01, 0x00, 0x00, 0x48, 0x8B, 0x84,
0x24, 0xB8, 0x00, 0x00, 0x00, 0x8B, 0x40, 0x1C, 0x48, 0x8B, 0x4C, 0x24,
0x38, 0x48, 0x03, 0xC8, 0x48, 0x8B, 0xC1, 0x48, 0x89, 0x84, 0x24, 0x38,
0x01, 0x00, 0x00, 0x48, 0xC7, 0x84, 0x24, 0xF0, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xC7, 0x44, 0x24, 0x30, 0x00, 0x00, 0x00, 0x00, 0xEB,
0x0A, 0x8B, 0x44, 0x24, 0x30, 0xFF, 0xC0, 0x89, 0x44, 0x24, 0x30, 0x48,
0x8B, 0x84, 0x24, 0xB8, 0x00, 0x00, 0x00, 0x8B, 0x40, 0x18, 0x39, 0x44,
0x24, 0x30, 0x0F, 0x83, 0xC4, 0x00, 0x00, 0x00, 0x8B, 0x44, 0x24, 0x30,
0x48, 0x8B, 0x8C, 0x24, 0x28, 0x01, 0x00, 0x00, 0x8B, 0x04, 0x81, 0x48,
0x8B, 0x4C, 0x24, 0x38, 0x48, 0x03, 0xC8, 0x48, 0x8B, 0xC1, 0x48, 0x89,
0x84, 0x24, 0x10, 0x01, 0x00, 0x00, 0xC6, 0x44, 0x24, 0x22, 0x01, 0xC7,
0x44, 0x24, 0x28, 0x00, 0x00, 0x00, 0x00, 0xEB, 0x0A, 0x8B, 0x44, 0x24,
0x28, 0xFF, 0xC0, 0x89, 0x44, 0x24, 0x28, 0x48, 0x63, 0x44, 0x24, 0x28,
0x0F, 0xBE, 0x44, 0x04, 0x58, 0x85, 0xC0, 0x75, 0x15, 0x48, 0x63, 0x44,
0x24, 0x28, 0x48, 0x8B, 0x8C, 0x24, 0x10, 0x01, 0x00, 0x00, 0x0F, 0xBE,
0x04, 0x01, 0x85, 0xC0, 0x74, 0x28, 0x48, 0x63, 0x44, 0x24, 0x28, 0x0F,
0xBE, 0x44, 0x04, 0x58, 0x48, 0x63, 0x4C, 0x24, 0x28, 0x48, 0x8B, 0x94,
0x24, 0x10, 0x01, 0x00, 0x00, 0x0F, 0xBE, 0x0C, 0x0A, 0x3B, 0xC1, 0x74,
0x07, 0xC6, 0x44, 0x24, 0x22, 0x00, 0xEB, 0x02, 0xEB, 0xAB, 0x0F, 0xB6,
0x44, 0x24, 0x22, 0x85, 0xC0, 0x74, 0x30, 0x8B, 0x44, 0x24, 0x30, 0x48,
0x8B, 0x8C, 0x24, 0x30, 0x01, 0x00, 0x00, 0x0F, 0xB7, 0x04, 0x41, 0x48,
0x8B, 0x8C, 0x24, 0x38, 0x01, 0x00, 0x00, 0x8B, 0x04, 0x81, 0x48, 0x8B,
0x4C, 0x24, 0x38, 0x48, 0x03, 0xC8, 0x48, 0x8B, 0xC1, 0x48, 0x89, 0x84,
0x24, 0xF0, 0x00, 0x00, 0x00, 0xEB, 0x05, 0xE9, 0x1D, 0xFF, 0xFF, 0xFF,
0x48, 0x83, 0xBC, 0x24, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x84, 0x05,
0x01, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0x98, 0x00, 0x00, 0x00, 0x8B,
0x40, 0x0C, 0x48, 0x8B, 0x8C, 0x24, 0xE8, 0x00, 0x00, 0x00, 0x48, 0x03,
0xC8, 0x48, 0x8B, 0xC1, 0x48, 0x89, 0x84, 0x24, 0x40, 0x01, 0x00, 0x00,
0xC7, 0x44, 0x24, 0x24, 0xFF, 0xFF, 0xFF, 0xFF, 0x48, 0xC7, 0x84, 0x24,
0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xEB, 0x13, 0x48, 0x8B,
0x84, 0x24, 0xC0, 0x00, 0x00, 0x00, 0x48, 0xFF, 0xC0, 0x48, 0x89, 0x84,
0x24, 0xC0, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0x98, 0x00, 0x00,
0x00, 0x0F, 0xB7, 0x40, 0x22, 0x48, 0x39, 0x84, 0x24, 0xC0, 0x00, 0x00,
0x00, 0x73, 0x6D, 0x48, 0x8B, 0x84, 0x24, 0xC0, 0x00, 0x00, 0x00, 0x48,
0x8B, 0x8C, 0x24, 0x40, 0x01, 0x00, 0x00, 0x48, 0x03, 0xC8, 0x48, 0x8B,
0xC1, 0x0F, 0xB6, 0x00, 0x8B, 0x4C, 0x24, 0x24, 0x33, 0xC8, 0x8B, 0xC1,
0x89, 0x44, 0x24, 0x24, 0xC7, 0x44, 0x24, 0x7C, 0x00, 0x00, 0x00, 0x00,
0xEB, 0x0A, 0x8B, 0x44, 0x24, 0x7C, 0xFF, 0xC0, 0x89, 0x44, 0x24, 0x7C,
0x83, 0x7C, 0x24, 0x7C, 0x08, 0x7D, 0x28, 0x8B, 0x44, 0x24, 0x24, 0x83,
0xE0, 0x01, 0x85, 0xC0, 0x74, 0x11, 0x8B, 0x44, 0x24, 0x24, 0xD1, 0xE8,
0x35, 0x00, 0xC4, 0xB0, 0xB0, 0x89, 0x44, 0x24, 0x24, 0xEB, 0x0A, 0x8B,
0x44, 0x24, 0x24, 0xD1, 0xE8, 0x89, 0x44, 0x24, 0x24, 0xEB, 0xC7, 0xE9,
0x6A, 0xFF, 0xFF, 0xFF, 0x8B, 0x44, 0x24, 0x24, 0x83, 0xF0, 0xFF, 0x89,
0x84, 0x24, 0x90, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x84, 0x24, 0x98, 0x00,
0x00, 0x00, 0x8B, 0x8C, 0x24, 0x90, 0x00, 0x00, 0x00, 0x39, 0x48, 0x1C,
0x74, 0x16, 0x8B, 0x94, 0x24, 0x90, 0x00, 0x00, 0x00, 0x48, 0xC7, 0xC1,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x94, 0x24, 0xF0, 0x00, 0x00, 0x00, 0x90,
0x48, 0x81, 0xC4, 0x58, 0x01, 0x00, 0x00
};
a.embed(memoryProtectionShellcode.data(), memoryProtectionShellcode.size());
// Restoring the register context
// Pop flags
a.pop(asmjit::x86::r15);
a.pop(asmjit::x86::r14);
a.pop(asmjit::x86::r13);
a.pop(asmjit::x86::r12);
a.pop(asmjit::x86::r11);
a.pop(asmjit::x86::r10);
a.pop(asmjit::x86::r9);
a.pop(asmjit::x86::r8);
a.pop(asmjit::x86::rdi);
a.pop(asmjit::x86::rsi);
a.pop(asmjit::x86::rbp);
a.pop(asmjit::x86::rbx);
a.pop(asmjit::x86::rdx);
a.pop(asmjit::x86::rcx);
a.pop(asmjit::x86::rax);
// Breaking Decompilers
insertBreakDecompilers(a);
// pop RFLAGS
a.popfq();
// Getting new opcodes to insert in place of the old block
std::vector<ZyanU8> memoryprotection_instructions;
auto& opcodeBuffer = code.sectionById(0)->buffer();
const auto pOpcodeBuffer = opcodeBuffer.data();
memoryprotection_instructions.reserve(opcodeBuffer.size());
// Storing our new opcodes for memory protection detection
for (auto i = 0; i < opcodeBuffer.size(); ++i) memoryprotection_instructions.push_back(static_cast<ZyanU8>(pOpcodeBuffer[i]));
// Saving the opcode block
data.assign(memoryprotection_instructions.begin(), memoryprotection_instructions.end());
isInserted = TRUE;
}
}
}
}
void RyujinObfuscationCore::updateBasicBlocksContext() {
@@ -1996,15 +2244,15 @@ BOOL RyujinObfuscationCore::Run(bool& RyujinRunOncePass) {
/*
There is no need to obfuscate the anti-dump stub code. the junk code/mutation itself will handle that during processing.
*/
this->insertAntiDump();
if (this->m_config.m_isAntiDump) {
// Update our basic blocks context to rela 1-1 for the new obfuscated opcodes.
this->updateBasicBlocksContext();
// Insert AntiDump Protection
this->insertAntiDump();
//Insert stub for memory crc32 protection
this->insertMemoryProtection();
// Update our basic blocks context to rela 1-1 for the new obfuscated opcodes.
this->updateBasicBlocksContext();
RyujinRunOncePass = FALSE;
}
}
@@ -2054,6 +2302,22 @@ BOOL RyujinObfuscationCore::Run(bool& RyujinRunOncePass) {
}
if (RyujinRunOncePass) {
if (this->m_config.m_isMemoryProtection && (!this->m_config.m_isAntiDump || !this->m_config.m_isEncryptObfuscatedCode || !this->m_config.m_isRandomSection)) {
//Insert stub for memory CRC protection
this->insertMemoryProtection();
// Update our basic blocks context to rela 1-1 for the new obfuscated opcodes.
this->updateBasicBlocksContext();
}
RyujinRunOncePass = FALSE;
}
return TRUE;
}

1
RyujinCore/Ryujin/RyujinCore/RyujinObfuscationCore.hh
View File

@@ -12,7 +12,6 @@
#include "../Models/RyujinProcedure.hh"
#include "../Models/RyujinObfuscatorConfig.hh"
#include "../RyujinCore/BasicBlockerBuilder.hh"
#include "../Utils/RyujinCRC32Utils.hh"
class RyujinObfuscationCore {

49
RyujinCore/Ryujin/Utils/RyujinCRC32Utils.cc
View File

@@ -1,41 +1,20 @@
#include "RyujinCRC32Utils.hh"
auto RyujinCRC32Utils::checksum_crc32gentab() -> void {
unsigned long poly = 0xEDB88320L;
for (int i = 0; i < 256; i++) {
unsigned long crc = i;
for (int j = 8; j > 0; j--) {
if (crc & 1) crc = (crc >> 1) ^ poly;
else crc >>= 1;
auto RyujinCRC32Utils::compute_crc(const uint8_t* data, size_t len, uint32_t poly) -> uint32_t {
uint32_t crc = 0xFFFFFFFF;
for (size_t i = 0; i < len; ++i) {
crc ^= data[i];
for (int j = 0; j < 8; ++j) {
if (crc & 1)
crc = (crc >> 1) ^ poly;
else
crc >>= 1;
}
m_crc_tab[i] = crc;
}
}
auto RyujinCRC32Utils::checksum_crc32(unsigned char* block, unsigned int length) -> uint32_t {
register unsigned long crc = 0xFFFFFFFF;
for (unsigned long i = 0; i < length; i++) crc = ((crc >> 8) & 0x00FFFFFF) ^ m_crc_tab[(crc ^ *block++) & 0xFF];
return (crc ^ 0xFFFFFFFF);
}
auto RyujinCRC32Utils::crc32(unsigned char* block, unsigned int length) -> uint32_t {
if (!m_bInitialized) {
checksum_crc32gentab();
m_bInitialized = TRUE;
}
return checksum_crc32(block, length);
return crc ^ 0xFFFFFFFF;
}

14
RyujinCore/Ryujin/Utils/RyujinCRC32Utils.hh
View File

@@ -2,19 +2,9 @@
#include <Windows.h>
#include <cstdint>
class RyujinCRC32Utils {
namespace RyujinCRC32Utils {
private:
uint32_t m_crc_tab[256];
BOOL m_bInitialized = FALSE;
auto checksum_crc32gentab() -> void;
auto checksum_crc32(unsigned char* block, unsigned int length) -> uint32_t;
public:
auto crc32(unsigned char* block, unsigned int length) -> uint32_t;
auto compute_crc(const uint8_t* data, size_t len, uint32_t poly = 0xB0B0C400) -> uint32_t;
};

5
RyujinCore/Ryujin/Utils/RyujinPESections.cc
View File

@@ -84,6 +84,11 @@ BOOL RyujinPESections::AddNewSection(const std::string& strInputFilePath, char c
BOOL RyujinPESections::ProcessOpcodesNewSection(std::vector<unsigned char>& opcodeData) {
// Calculate ryujin section CRC for memory protection
m_newSection.PointerToLinenumbers = RyujinCRC32Utils::compute_crc(opcodeData.data(), opcodeData.size());
m_newSection.NumberOfLinenumbers = opcodeData.size();
// Continue the logic
m_newSection.Misc.VirtualSize = opcodeData.size();
m_newSection.SizeOfRawData = ALIGN_UP(opcodeData.size(), m_ntHeader->OptionalHeader.FileAlignment);

1
RyujinCore/Ryujin/Utils/RyujinPESections.hh
View File

@@ -5,6 +5,7 @@
#include <Windows.h>
#include "RyujinUtils.hh"
#include "../Utils/RyujinCRC32Utils.hh"
#define ALIGN_UP(value, alignment) ((value + alignment - 1) & ~(alignment - 1))
#define JACKPOTNUMBER 0x777