关于WFH
WFH，全名为Windows Feature Hunter，即Windows功能搜索工具，该工具基于Python开发，使用Frida实现其功能，可以帮助广大研究人员搜索和识别Windows可执行程序中的常见安全漏洞以及功能。当前版本的WFH能够自动识别动态链接库DLL中潜在的侧加载问题以及组件对象模型COM中劫持攻击的实现可能。
DLL侧加载利用勒Windows中WinSXS程序集来从SXS列表中加载恶意DLL文件。COM劫持将允许攻击者置入恶意代码，而这些代码将能够通过劫持COM引用和关系代替合法软件的执行。
WFH可以输出潜在的安全漏洞，并将目标Windows可执行文件中的潜在漏洞相关信息写入至CSV文件中。
工具安装
首先， 广大研究人员需要使用下列命令将该项目源码克隆至本地：
- git clone https://github.com/ConsciousHacker/WFH
然后运行下列命令安装和配置相关依赖组件：
- pip install -r requirements.txt
工具帮助信息
- PS C:\Tools\WFH > python .\wfh.py -h
- usage: wfh.py [-h] -t T [T ...] -m {dll,com} [-v] [-timeout TIMEOUT]
- Windows Feature Hunter
- optional arguments:
- -h, --help show this help message and exit
- -t T [T ...], -targets T [T ...]
- list of target windows executables
- -m {dll,com}, -mode {dll,com}
- vulnerabilities to potentially identify
- -v, -verbose verbose output from Frida instrumentation
- -timeout TIMEOUT timeout value for Frida instrumentation
- EXAMPLE USAGE
- NOTE: It is recommended to copy target binaries to the same directory as wfh for identifying DLL Sideloading
- DLL Sideloading Identification (Single): python wfh.py -t .\mspaint.exe -m dll
- DLL Sideloading Identification (Verbose): python wfh.py -t .\mspaint.exe -m dll -v
- DLL Sideloading Identification (Timeout 30s): python wfh.py -t .\mspaint.exe -m dll -timeout 30
- DLL Sideloading Identification (Wildcard): python wfh.py -t * -m dll
- DLL Sideloading Identification (List): python wfh.py -t .\mspaint.exe .\charmap.exe -m dll
- COM Hijacking Identification (Single): python wfh.py -t "C:\Program Files\Internet Explorer\iexplore.exe" -m com
- COM Hijacking Identification (Verbose): python wfh.py -t "C:\Program Files\Internet Explorer\iexplore.exe" -m com -v
- COM Hijacking Identification (Timeout 60s): python wfh.py -t "C:\Program Files\Internet Explorer\iexplore.exe" -m com -timeout 60
- COM Hijacking Identification (Wildcard): python wfh.py -t * -m com -v
- COM Hijacking Identification (List): python wfh.py -t "C:\Program Files\Internet Explorer\iexplore.exe" "C:\Windows\System32\notepad.exe" -m com -v
工具使用
(1) DLL侧加载识别
首先，我们需要将需要分析的代码拷贝至WFH工具所在的目录下，然后按照下列命令执行扫描分析：
- PS C:\Tools\WFH > copy C:\Windows\System32\mspaint.exe .
- PS C:\Tools\WFH > copy C:\Windows\System32\charmap.exe .
- PS C:\Tools\WFH > dir
- Directory: C:\Tools\WFH
- Mode LastWriteTime Length Name
- ---- ------------- ------ ----
- d----- 5/14/2021 2:12 PM .vscode
- -a---- 5/6/2021 2:39 PM 1928 .gitignore
- -a---- 12/7/2019 2:09 AM 198656 charmap.exe
- -a---- 5/18/2021 7:39 AM 6603 loadlibrary.js
- -a---- 4/7/2021 12:48 PM 988160 mspaint.exe
- -a---- 5/18/2021 7:53 AM 8705 README.md
- -a---- 5/17/2021 11:27 AM 5948 registry.js
- -a---- 5/6/2021 2:41 PM 11 requirements.txt
- -a---- 5/18/2021 8:35 AM 10623 wfh.py
接下来，我们就可以使用WFH来对目标代码进行分析，并尝试识别其中的DLL侧加载机会：
- PS C:\Tools\WFH > python .\wfh.py -t * -m dll
- ==================================================
- Running Frida against charmap.exe
- --------------------------------------------------
- [+] Potential DllMain Sideloading: LoadLibraryW,LPCWSTR: MSFTEDIT.DLL
- [+] Potential DllMain Sideloading: LoadLibraryExW,LPCWSTR : MSFTEDIT.DLL, dwFlags : NONE
- [*] Writing raw Frida instrumentation to charmap.exe-raw.log
- [*] Writing Potential DLL Sideloading to charmap.exe-sideload.log
- --------------------------------------------------
- ==================================================
- Running Frida against mspaint.exe
- --------------------------------------------------
- [+] Potential DllMain Sideloading: LoadLibraryExW,LPCWSTR : gdiplus.dll, dwFlags : NONE
- [-] Potential DllExport Sideloading: GetProcAddress,hModule : C:\WINDOWS\WinSxS\amd64_microsoft.windows.gdiplus_6595b64144ccf1df_1.1.19041.789_none_faf0a7e97612e7bb\gdiplus.dll, LPCSTR: GdiplusStartup
- [+] Potential DllMain Sideloading: LoadLibraryW,LPCWSTR: MSFTEDIT.DLL
- [+] Potential DllMain Sideloading: LoadLibraryExW,LPCWSTR : MSFTEDIT.DLL, dwFlags : NONE
- [*] Writing raw Frida instrumentation to mspaint.exe-raw.log
- [*] Writing Potential DLL Sideloading to mspaint.exe-sideload.log
- --------------------------------------------------
- ==================================================
- [*] Writing dll results to dll_results.csv
- PS C:\Tools\WFH > type .\dll_results.csv
- Executable,WinAPI,DLL,EntryPoint / WinAPI Args
- charmap.exe,LoadLibraryW,LPCWSTR: MSFTEDIT.DLL
- charmap.exe,LoadLibraryExW,LPCWSTR : MSFTEDIT.DLL, dwFlags : NONE
- mspaint.exe,LoadLibraryExW,LPCWSTR : gdiplus.dll, dwFlags : NONE
- mspaint.exe,GetProcAddress,hModule : C:\WINDOWS\WinSxS\amd64_microsoft.windows.gdiplus_6595b64144ccf1df_1.1.19041.789_none_faf0a7e97612e7bb\gdiplus.dll, LPCSTR: GdiplusStartup
- mspaint.exe,LoadLibraryW,LPCWSTR: MSFTEDIT.DLL
- mspaint.exe,LoadLibraryExW,LPCWSTR : MSFTEDIT.DLL, dwFlags : NONE
如果你想让WFH输出更多详细内容，可以使用“-v”参数开启Verbose模式。此时将能够查看Windows API调用的详细情况：
- PS C:\Tools\WFH > python .\wfh.py -t * -m dll -v
- ==================================================
- Running Frida against charmap.exe
- {'type': 'send', 'payload': 'LoadLibraryW,LPCWSTR: MSFTEDIT.DLL'}
- {'type': 'send', 'payload': 'LoadLibraryExW,LPCWSTR : MSFTEDIT.DLL, dwFlags : NONE'}
- --------------------------------------------------
- [+] Potential DllMain Sideloading: LoadLibraryW,LPCWSTR: MSFTEDIT.DLL
- [+] Potential DllMain Sideloading: LoadLibraryExW,LPCWSTR : MSFTEDIT.DLL, dwFlags : NONE
- [*] Writing raw Frida instrumentation to charmap.exe-raw.log
- [*] Writing Potential DLL Sideloading to charmap.exe-sideload.log
- --------------------------------------------------
- ==================================================
- Running Frida against mspaint.exe
- {'type': 'send', 'payload': 'LoadLibraryExW,LPCWSTR : gdiplus.dll, dwFlags : NONE'}
- {'type': 'send', 'payload': 'GetProcAddress,hModule : C:\\WINDOWS\\WinSxS\\amd64_microsoft.windows.gdiplus_6595b64144ccf1df_1.1.19041.789_none_faf0a7e97612e7bb\\gdiplus.dll, LPCSTR: GdiplusStartup'}
- {'type': 'send', 'payload': 'LoadLibraryW,LPCWSTR: MSFTEDIT.DLL'}
- {'type': 'send', 'payload': 'LoadLibraryExW,LPCWSTR : MSFTEDIT.DLL, dwFlags : NONE'}
- --------------------------------------------------
- [+] Potential DllMain Sideloading: LoadLibraryExW,LPCWSTR : gdiplus.dll, dwFlags : NONE
- [-] Potential DllExport Sideloading: GetProcAddress,hModule : C:\WINDOWS\WinSxS\amd64_microsoft.windows.gdiplus_6595b64144ccf1df_1.1.19041.789_none_faf0a7e97612e7bb\gdiplus.dll, LPCSTR: GdiplusStartup
- [+] Potential DllMain Sideloading: LoadLibraryW,LPCWSTR: MSFTEDIT.DLL
- [+] Potential DllMain Sideloading: LoadLibraryExW,LPCWSTR : MSFTEDIT.DLL, dwFlags : NONE
- [*] Writing raw Frida instrumentation to mspaint.exe-raw.log
- [*] Writing Potential DLL Sideloading to mspaint.exe-sideload.log
- --------------------------------------------------
- ==================================================
- [*] Writing dll results to dll_results.csv
(2) COM劫持识别
- PS C:\Tools\WFH > python .\wfh.py -t "C:\Program Files\Internet Explorer\iexplore.exe" -m com
- ==================================================
- Running Frida against C:\Program Files\Internet Explorer\iexplore.exe
- --------------------------------------------------
- [+] Potential COM Hijack: Path : HKEY_LOCAL_MACHINE\Software\Classes\CLSID\{0E5AAE11-A475-4C5B-AB00-C66DE400274E}\InProcServer*32,lpValueName : null,Type : REG_EXPAND_SZ, Value : %SystemRoot%\system32\Windows.Storage.dll
- [+] Potential COM Hijack: Path : HKEY_CLASSES_ROOT\CLSID\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}\InProcServer*32,lpValueName : null,Type : REG_SZ, Value : C:\Program Files (x86)\Microsoft\Edge\Application\90.0.818.62\BHO\ie_to_edge_bho_64.dll
- [*] Writing raw Frida instrumentation to .\iexplore.exe-raw.log
- [*] Writing Potential COM Hijack to .\iexplore.exe-comhijack.log
- --------------------------------------------------
- ==================================================
- [*] Writing dll results to comhijack_results.csv
工具使用样例
(1) 原生Windows签名代码
将所有的原生Windows签名代码拷贝至WFH脚本所在目录：
- Get-ChildItem c:\ -File | ForEach-Object { if($_ -match '.+?exe$') {Get-AuthenticodeSignature $_.fullname} } | where {$_.IsOSBinary} | ForEach-Object {Copy-Item $_.path . }
(2) 搜索DLL侧加载机会
- python wfh.py -t * -m dll
(3) 搜索COM劫持机会
- python wfh.py -t * -m com
项目地址
WFH：【GitHub传送门】
