diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..e175e04
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.10)
+project(LDPathHackDemo)
+
+add_subdirectory(real_lib)
+add_subdirectory(fake_lib)
+add_subdirectory(victim)
diff --git a/README.md b/README.md
index e69de29..90eedab 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,11 @@
+# 빌드
+mkdir build && cd build
+cmake ..
+cmake --build .
+
+# 정상 실행
+./victim/victim
+
+# 가짜 라이브러리 우선 경로 설정
+mv real_lib/libmylib.so real_lib/libmylib_
+LD_LIBRARY_PATH=./fake_lib ./victim/victim
\ No newline at end of file
diff --git a/fake_lib/CMakeLists.txt b/fake_lib/CMakeLists.txt
new file mode 100644
index 0000000..c5b6d8a
--- /dev/null
+++ b/fake_lib/CMakeLists.txt
@@ -0,0 +1,2 @@
+add_library(mylib_fake SHARED mylib.cpp)
+set_target_properties(mylib_fake PROPERTIES OUTPUT_NAME mylib)
diff --git a/fake_lib/mylib.cpp b/fake_lib/mylib.cpp
new file mode 100644
index 0000000..94cbee2
--- /dev/null
+++ b/fake_lib/mylib.cpp
@@ -0,0 +1,4 @@
+#include <iostream>
+void greet() {
+    std::cout << "❌ HACKED: This is the fake library!" << std::endl;
+}
diff --git a/real_lib/CMakeLists.txt b/real_lib/CMakeLists.txt
new file mode 100644
index 0000000..08be752
--- /dev/null
+++ b/real_lib/CMakeLists.txt
@@ -0,0 +1,2 @@
+add_library(mylib SHARED mylib.cpp)
+set_target_properties(mylib PROPERTIES OUTPUT_NAME mylib)
\ No newline at end of file
diff --git a/real_lib/mylib.cpp b/real_lib/mylib.cpp
new file mode 100644
index 0000000..4588ccc
--- /dev/null
+++ b/real_lib/mylib.cpp
@@ -0,0 +1,4 @@
+#include <iostream>
+void greet() {
+    std::cout << "✅ Hello from the real library!" << std::endl;
+}
\ No newline at end of file
diff --git a/victim/CMakeLists.txt b/victim/CMakeLists.txt
new file mode 100644
index 0000000..a65c4b9
--- /dev/null
+++ b/victim/CMakeLists.txt
@@ -0,0 +1,3 @@
+add_executable(victim main.cpp)
+target_include_directories(victim PRIVATE ${CMAKE_SOURCE_DIR}/victim)
+target_link_libraries(victim PRIVATE mylib)
diff --git a/victim/main.cpp b/victim/main.cpp
new file mode 100644
index 0000000..bc6f7d4
--- /dev/null
+++ b/victim/main.cpp
@@ -0,0 +1,6 @@
+#include "mylib.h"
+
+int main() {
+    greet();
+    return 0;
+}
diff --git a/victim/mylib.h b/victim/mylib.h
new file mode 100644
index 0000000..66f5e6e
--- /dev/null
+++ b/victim/mylib.h
@@ -0,0 +1,2 @@
+#pragma once
+void greet();