updated vmprofiler, starting to save register values for each

instruction executed.. this way profilers can have access to those
register values and extract decrypted imm's...

.gitmodules

@@ -1,6 +1,3 @@
 [submodule "deps/vmprofiler"]
 	path = deps/vmprofiler
 	url = https://githacks.org/vmp3/vmprofiler.git
-[submodule "deps/unicorn"]
-	path = deps/unicorn
-	url = https://github.com/unicorn-engine/unicorn.git

cmake.toml

@@ -1,5 +1,4 @@
- 
-[project]
+ [project]
 name = "vmemu"
 
 [subdir.deps]

deps/CMakeLists.txt

@@ -16,13 +16,3 @@ endif()
 add_subdirectory(vmprofiler)
 set(CMAKE_FOLDER ${CMKR_CMAKE_FOLDER})
 
-# unicorn
-set(CMKR_CMAKE_FOLDER ${CMAKE_FOLDER})
-if(CMAKE_FOLDER)
-	set(CMAKE_FOLDER "${CMAKE_FOLDER}/unicorn")
-else()
-	set(CMAKE_FOLDER unicorn)
-endif()
-add_subdirectory(unicorn)
-set(CMAKE_FOLDER ${CMKR_CMAKE_FOLDER})
-

deps/cmake.toml

@@ -1,2 +1 @@
 [subdir.vmprofiler]
-[subdir.unicorn]

deps/unicorn

@@ -1 +0,0 @@
-Subproject commit 63a445cbba18bf1313ac3699b5d25462b5d529f4

deps/vmprofiler

@@ -1 +1 @@
-Subproject commit 20ad0b595078ebf82d977ddfb5999332b2ce0e73
+Subproject commit 79c369582866ed888741b283bd6dca6677bf3a9d

include/vmemu_t.hpp

@@ -12,16 +12,20 @@
 namespace vm {
 class emu_t {
  public:
-  explicit emu_t(vm::vmctx_t* vm_ctx);
-  ~emu_t();
+  explicit emu_t(
+      vm::vmctx_t* vm_ctx,
+      std::map<std::uint32_t, vm::instrs::profiler_t*>* known_hndlrs);
 
+  ~emu_t();
   bool init();
   void emulate();
 
  private:
-  uc_engine* uc_ctx;
-  const vm::vmctx_t* m_vm_ctx;
+  uc_engine* uc;
+  const vm::vmctx_t* m_vm;
   zydis_reg_t vip, vsp;
+  std::map<std::uint32_t, vm::instrs::profiler_t*>* m_known_hndlrs;
+  std::unique_ptr<vm::instrs::hndlr_trace_t> cc_trace;
   uc_hook code_exec_hook, invalid_mem_hook, int_hook;
 
   static void int_callback(uc_engine* uc, std::uint32_t intno, emu_t* obj);

src/main.cpp

@@ -46,9 +46,7 @@ int __cdecl main(int argc, const char* argv[]) {
     return 0;
   }
 
-  vm::utils::init();
   std::vector<std::uint8_t> module_data, tmp, unpacked_bin;
-
   if (!vm::utils::open_binary_file(parser.get<std::string>("bin"),
                                    module_data)) {
     std::printf("[!] failed to open binary file...\n");
@@ -127,7 +125,9 @@ int __cdecl main(int argc, const char* argv[]) {
       return -1;
     }
 
-    vm::emu_t emu(&vmctx);
+    std::map<std::uint32_t, vm::instrs::profiler_t*> known_hndlrs;
+    vm::emu_t emu(&vmctx, &known_hndlrs);
+
     if (!emu.init()) {
       std::printf(
           "[!] failed to init vm::emu_t... read above in the console for the "

src/vmemu_t.cpp

@@ -1,55 +1,60 @@
 #include <vmemu_t.hpp>
 
 namespace vm {
-emu_t::emu_t(vm::vmctx_t* vm_ctx)
-    : m_vm_ctx(vm_ctx), vip(vm_ctx->get_vip()), vsp(vm_ctx->get_vsp()) {}
+emu_t::emu_t(vm::vmctx_t* vm_ctx,
+             std::map<std::uint32_t, vm::instrs::profiler_t*>* known_hndlrs)
+    : m_vm(vm_ctx),
+      vip(vm_ctx->get_vip()),
+      vsp(vm_ctx->get_vsp()),
+      cc_trace(nullptr),
+      m_known_hndlrs(known_hndlrs) {}
 
 emu_t::~emu_t() {
-  if (uc_ctx)
-    uc_close(uc_ctx);
+  if (uc)
+    uc_close(uc);
 }
 
 bool emu_t::init() {
   uc_err err;
-  if ((err = uc_open(UC_ARCH_X86, UC_MODE_64, &uc_ctx))) {
+  if ((err = uc_open(UC_ARCH_X86, UC_MODE_64, &uc))) {
     std::printf("> uc_open err = %d\n", err);
     return false;
   }
 
-  if ((err = uc_mem_map(uc_ctx, STACK_BASE, STACK_SIZE, UC_PROT_ALL))) {
+  if ((err = uc_mem_map(uc, STACK_BASE, STACK_SIZE, UC_PROT_ALL))) {
     std::printf("> uc_mem_map stack err, reason = %d\n", err);
     return false;
   }
 
-  if ((err = uc_mem_map(uc_ctx, m_vm_ctx->m_module_base, m_vm_ctx->m_image_size,
+  if ((err = uc_mem_map(uc, m_vm->m_module_base, m_vm->m_image_size,
                         UC_PROT_ALL))) {
     std::printf("> map memory failed, reason = %d\n", err);
     return false;
   }
 
-  if ((err = uc_mem_write(uc_ctx, m_vm_ctx->m_module_base,
-                          reinterpret_cast<void*>(m_vm_ctx->m_module_base),
-                          m_vm_ctx->m_image_size))) {
+  if ((err = uc_mem_write(uc, m_vm->m_module_base,
+                          reinterpret_cast<void*>(m_vm->m_module_base),
+                          m_vm->m_image_size))) {
     std::printf("> failed to write memory... reason = %d\n", err);
     return false;
   }
 
-  if ((err = uc_hook_add(uc_ctx, &code_exec_hook, UC_HOOK_CODE,
+  if ((err = uc_hook_add(uc, &code_exec_hook, UC_HOOK_CODE,
                          (void*)&vm::emu_t::code_exec_callback, this,
-                         m_vm_ctx->m_module_base,
-                         m_vm_ctx->m_module_base + m_vm_ctx->m_image_size))) {
+                         m_vm->m_module_base,
+                         m_vm->m_module_base + m_vm->m_image_size))) {
     std::printf("> uc_hook_add error, reason = %d\n", err);
     return false;
   }
 
-  if ((err = uc_hook_add(uc_ctx, &int_hook, UC_HOOK_INTR,
+  if ((err = uc_hook_add(uc, &int_hook, UC_HOOK_INTR,
                          (void*)&vm::emu_t::int_callback, this, 0ull, 0ull))) {
     std::printf("> uc_hook_add error, reason = %d\n", err);
     return false;
   }
 
   if ((err =
-           uc_hook_add(uc_ctx, &invalid_mem_hook,
+           uc_hook_add(uc, &invalid_mem_hook,
                        UC_HOOK_MEM_READ_UNMAPPED | UC_HOOK_MEM_WRITE_UNMAPPED |
                            UC_HOOK_MEM_FETCH_UNMAPPED,
                        (void*)&vm::emu_t::invalid_mem, this, true, false))) {
@@ -61,21 +66,25 @@ bool emu_t::init() {
 
 void emu_t::emulate() {
   uc_err err;
-  std::uintptr_t rip = m_vm_ctx->m_vm_entry_rva + m_vm_ctx->m_module_base,
+  std::uintptr_t rip = m_vm->m_vm_entry_rva + m_vm->m_module_base,
                  rsp = STACK_BASE + STACK_SIZE - PAGE_4KB;
 
-  if ((err = uc_reg_write(uc_ctx, UC_X86_REG_RSP, &rsp))) {
+  if ((err = uc_reg_write(uc, UC_X86_REG_RSP, &rsp))) {
     std::printf("> uc_reg_write error, reason = %d\n", err);
     return;
   }
 
-  if ((err = uc_reg_write(uc_ctx, UC_X86_REG_RIP, &rip))) {
+  if ((err = uc_reg_write(uc, UC_X86_REG_RIP, &rip))) {
     std::printf("> uc_reg_write error, reason = %d\n", err);
     return;
   }
 
+  cc_trace = std::make_unique<vm::instrs::hndlr_trace_t>();
+  cc_trace->m_vip = vip;
+  cc_trace->m_vsp = vsp;
+
   std::printf("> beginning execution at = %p\n", rip);
-  if ((err = uc_emu_start(uc_ctx, rip, 0ull, 0ull, 0ull))) {
+  if ((err = uc_emu_start(uc, rip, 0ull, 0ull, 0ull))) {
     std::printf("> error starting emu... reason = %d\n", err);
     return;
   }
@@ -118,8 +127,6 @@ bool emu_t::code_exec_callback(uc_engine* uc,
                                emu_t* obj) {
   uc_err err;
   static thread_local zydis_decoded_instr_t instr;
-  static thread_local zydis_rtn_t instr_stream;
-
   if (!ZYAN_SUCCESS(ZydisDecoderDecodeBuffer(vm::utils::g_decoder.get(),
                                              reinterpret_cast<void*>(address),
                                              PAGE_4KB, &instr))) {
@@ -134,35 +141,36 @@ bool emu_t::code_exec_callback(uc_engine* uc,
   if (instr.mnemonic == ZYDIS_MNEMONIC_INVALID)
     return false;
 
-  instr_stream.push_back({instr});
+  uc_context* cpu_ctx;
+  uc_context_alloc(obj->uc, &cpu_ctx);
+  vm::instrs::emu_instr_t emu_instr{instr, cpu_ctx};
+  obj->cc_trace->m_instrs.push_back(emu_instr);
+
   if (instr.mnemonic == ZYDIS_MNEMONIC_RET ||
       (instr.mnemonic == ZYDIS_MNEMONIC_JMP &&
        instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER)) {
-    // find the last mov reg, [vip]
-    auto fetch_offset = std::find_if(
-        instr_stream.rbegin(), instr_stream.rend(),
-        [&](const zydis_instr_t& instr) -> bool {
-          return instr.instr.mnemonic == ZYDIS_MNEMONIC_MOV &&
-                 instr.instr.operands[0].type == ZYDIS_OPERAND_TYPE_REGISTER &&
-                 instr.instr.operands[1].type == ZYDIS_OPERAND_TYPE_MEMORY &&
-                 instr.instr.operands[1].mem.base == obj->m_vm_ctx->get_vip();
-        });
-
-    // cut off the extra stuff...
-    if (fetch_offset != instr_stream.rend())
-      instr_stream.erase((fetch_offset + 1).base(), instr_stream.end());
-
-    vm::utils::deobfuscate(instr_stream);
-    vm::utils::print(instr_stream);
-
-    auto vinstr = vm::instrs::determine(obj->vip, obj->vsp, instr_stream);
-    if (vinstr.mnemonic == vm::instrs::mnemonic_t::jmp) {
-      std::printf("> found jmp...\n");
+    const auto vinstr =
+        vm::instrs::determine(obj->vip, obj->vsp, *obj->cc_trace);
+
+    if (vinstr.mnemonic != vm::instrs::mnemonic_t::unknown) {
+      std::printf("> %s\n",
+                  vm::instrs::get_profile(vinstr.mnemonic)->name.c_str());
       std::getchar();
     }
 
-    instr_stream.clear();
-    std::printf("============\n");
+    if (vinstr.mnemonic == vm::instrs::mnemonic_t::jmp) {
+      obj->cc_trace->m_vip = obj->vip;
+      obj->cc_trace->m_vsp = obj->vsp;
+    }
+
+    // free the trace since we will start a new one...
+    std::for_each(obj->cc_trace->m_instrs.begin(),
+                  obj->cc_trace->m_instrs.end(),
+                  [&](const vm::instrs::emu_instr_t& instr) {
+                    uc_context_free(instr.m_cpu);
+                  });
+
+    obj->cc_trace->m_instrs.clear();
   }
   return true;
 }