Checking files

Some files are created by Virtualbox and VMware on the system.

Malware can check the different folders to find Virtualbox artifacts like VBoxMouse.sys.

Malware can check the different folders to find VMware artifacts like vmmouse.sys, vmhgfs.sys.

Some Files Example

Below is a list of files that can be detected on virtual machines:

  • “C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\agent.pyw”,
  • “C:\WINDOWS\system32\drivers\vmmouse.sys”,
  • “C:\WINDOWS\system32\drivers\vmhgfs.sys”,
  • “C:\WINDOWS\system32\drivers\VBoxMouse.sys”,
  • “C:\WINDOWS\system32\drivers\VBoxGuest.sys”,
  • “C:\WINDOWS\system32\drivers\VBoxSF.sys”,
  • “C:\WINDOWS\system32\drivers\VBoxVideo.sys”,
  • “C:\WINDOWS\system32\vboxdisp.dll”,
  • “C:\WINDOWS\system32\vboxhook.dll”,
  • “C:\WINDOWS\system32\vboxmrxnp.dll”,
  • “C:\WINDOWS\system32\vboxogl.dll”,
  • “C:\WINDOWS\system32\vboxoglarrayspu.dll”,
  • “C:\WINDOWS\system32\vboxoglcrutil.dll”,
  • “C:\WINDOWS\system32\vboxoglerrorspu.dll”,
  • “C:\WINDOWS\system32\vboxoglfeedbackspu.dll”,
  • “C:\WINDOWS\system32\vboxoglpassthroughspu.dll”,
  • “C:\WINDOWS\system32\vboxservice.exe”,
  • “C:\WINDOWS\system32\vboxtray.exe”,
  • “C:\WINDOWS\system32\VBoxControl.exe”

Code Snippets

#include <iostream>
#include <windows.h>

using namespace std;


BOOL FileExists(TCHAR* szPath)
{
	DWORD dwAttrib = GetFileAttributes(szPath);
	return (dwAttrib != INVALID_FILE_ATTRIBUTES) && !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY);
}

// Check if file related to sandbox exist
int CheckFile()
{
    bool hAppend;
    LPSTR fname[] = {"C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\StartUp\\agent.pyw",
                     "C:\\WINDOWS\\system32\\drivers\\vmmouse.sys",
                     "C:\\WINDOWS\\system32\\drivers\\vmhgfs.sys",
                     "C:\\WINDOWS\\system32\\drivers\\VBoxMouse.sys",
                     "C:\\WINDOWS\\system32\\drivers\\VBoxGuest.sys",
                     "C:\\WINDOWS\\system32\\drivers\\VBoxSF.sys",
                     "C:\\WINDOWS\\system32\\drivers\\VBoxVideo.sys",
                     "C:\\WINDOWS\\system32\\vboxdisp.dll",
                     "C:\\WINDOWS\\system32\\vboxhook.dll",
                     "C:\\WINDOWS\\system32\\vboxmrxnp.dll",
                     "C:\\WINDOWS\\system32\\vboxogl.dll",
                     "C:\\WINDOWS\\system32\\vboxoglarrayspu.dll",
                     "C:\\WINDOWS\\system32\\vboxoglcrutil.dll",
                     "C:\\WINDOWS\\system32\\vboxoglerrorspu.dll",
                     "C:\\WINDOWS\\system32\\vboxoglfeedbackspu.dll",
                     "C:\\WINDOWS\\system32\\vboxoglpackspu.dll",
                     "C:\\WINDOWS\\system32\\vboxoglpassthroughspu.dll",
                     "C:\\WINDOWS\\system32\\vboxservice.exe",
                     "C:\\WINDOWS\\system32\\vboxtray.exe",
                     "C:\\WINDOWS\\system32\\VBoxControl.exe",
                     // ADD YOUR FILE HERE!
                    };

    for (int i = 0; i < (sizeof(fname) / sizeof(LPSTR)); i++)
    {

        if (FileExists(fname[i]))
            cout << " [+] File exist: " << (fname[i]) << endl;
		else
            cout << " [-] File doesn't exist: " << (fname[i]) << endl;

    }

    return 0;
}


int main()
{
    CheckFile();
    return 0;
}

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