The code appears to attempt privilege escalation on a Windows...
The code appears to attempt privilege escalation on a Windows system using a known "fodhelper" UAC (User Account Control) bypass technique. Here’s a detailed breakdown of what it does:
1. Registry Key Manipulation
The function Elevate
first creates or opens the Windows registry key:
HKEY_CURRENT_USER\Software\Classes\ms-settings\shell\open\command
This key is often targeted in UAC bypass techniques since the "ms-settings" protocol can trigger elevated processes.
- The
registry.CreateKey
function creates the key if it doesn't exist or opens it withALL_ACCESS
permissions. - If there's an error, the function immediately returns it.
2. Setting Registry Values
The code sets two values in the opened registry key:
- The default value (
""
) is set to the path of the current executable (os.Executable()
). This means that whenever the associated handler is triggered (viams-settings
), the current executable will be executed. - A
DelegateExecute
value is set as an empty string (""
). This is a required step for bypassing UAC using "fodhelper.exe", asDelegateExecute
disables some safeguards when triggering elevated commands.
3. Launching "fodhelper.exe"
The code then runs the fodhelper.exe
utility:
cmd := exec.Command("cmd.exe", "/C", "fodhelper")
cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
err = cmd.Run()
fodhelper.exe
is a legitimate Windows executable that runs with elevated privileges by default. Since the attacker-controlled registry key (ms-settings
) has been modified earlier, launching "fodhelper.exe" indirectly executes the attacker's process (the current program) with administrator privileges, bypassing UAC.
4. Cleanup
After executing the "fodhelper.exe" utility, the code cleans up by deleting the modified registry values:
err = k.DeleteValue("")
err = k.DeleteValue("DelegateExecute")
This removes traces of the modification, leaving the system in its original state.
5. Return
Finally, the function returns any errors encountered during the process.
Summary:
This function implements a UAC bypass using fodhelper.exe. It:
- Modifies a registry key to execute the current program as an elevated process.
- Launches
fodhelper.exe
to trigger the modified registry key. - Cleans up the registry changes after execution.
This code could be used for malicious purposes, so caution is recommended. It exploits a well-documented Windows technique and highlights the dangers of improperly secured UAC mechanisms.