├── README.md
├── VBoxCloak.ps1
└── LICENSE


/README.md:
--------------------------------------------------------------------------------
 1 | # VBoxCloak
 2 | 
 3 | A PowerShell script that attempts to help malware analysts hide their VirtualBox Windows VM's from malware that may be trying to evade analysis. Guaranteed to bring down your pafish ratings by at least a few points ;)
 4 | 
 5 | The script accomplishes this by doing the following:
 6 | 
 7 | - Renames several registry keys that malware typically uses for VM detection.
 8 | - Kills VirtualBox processes (VBoxService and VBoxTray, etc.).
 9 | - Deletes VirtualBox driver files (this will not crash VirtualBox, since these drivers are loaded into memory anyway!).
10 | - Deletes or renames VirtualBox supporting files in System32 and SysWOW64 directories.
11 | 
12 | For more info, see my blog post here: 
13 | https://securityliterate.com/hiding-virtual-machines-from-malware-introducing-vmwarecloak-vboxcloak/
14 | 
15 | Note: This script will not cover ALL VM detection techniques! There are a lot of ways to detect a VM, and many of these cannot be fixed with a simple Powershell script. For example, techniques such as RDTSC and timing detection are not covered, neither is CPUID detection.
16 | 
17 | Tested on Windows 7 and Windows 10 - Probably works on Windows XP and Windows 11 as well.
18 | 
19 | Spot any bugs? Let me know!
20 | 
21 | # Usage
22 | 
23 | 1. Simply run VBoxCloak.ps1 as Administrator on your Windows VirtualBox VM.
24 | 2. Detonate your malware. Profit.
25 | 3. When done, reset your VM to clean state.
26 | 
27 | Usage examples:
28 | 
29 | Make registry changes, remove VBox files, and kill VBox processes:
30 |   
31 |   - "VBoxCloak.ps1 -all"
32 |   
33 | Just make registry modificaitons:
34 |   
35 |   - "VBoxCloak.ps1 -reg"
36 |   
37 | Just remove VBox files:
38 |   
39 |   - "VBoxCloak.ps1 -files"
40 |   
41 | Just kill VBox processes:
42 |   
43 |   - "VBoxCloak.ps1 -procs"
44 | 
45 | # Warnings & Disclaimers
46 | 
47 | - This code is in Beta. I know I could have coded it better, but sometimes quick and dirty is best.
48 | - Use at your own risk! Use only in a VM, and NOT on your host.
49 | - Ensure to make a snapshot of your VM before running this.
50 | - Using the "files" and/or "procs" command line arguments may result in lower VM performance. This is because this script removes several files that are required for supporting functions such as graphics, keyboard input, etc. Just revert VM to clean state if this messes anything up.
51 | 
52 | 


--------------------------------------------------------------------------------
/VBoxCloak.ps1:
--------------------------------------------------------------------------------
  1 | #################################################
  2 | ## VBoxCloak.ps1: A script that attempts to hide the VirtualBox hypervisor from malware by modifying registry keys, killing associated processes, and removing uneeded driver/system files.
  3 | ## Written and tested on Windows 7 and Windows 10. Should work for Windows 11 as well!
  4 | ## Many thanks to pafish for some of the ideas - https://github.com/a0rtega/pafish
  5 | ##################################################
  6 | ## Author: d4rksystem (Kyle Cucci)
  7 | ## Version: 0.7 (July 2025)
  8 | ##################################################
  9 | 
 10 | # Define command line parameters
 11 | param (
 12 |     [switch]$all = $false,
 13 |     [switch]$reg = $false,
 14 |     [switch]$procs = $false,
 15 |     [switch]$files = $false
 16 | )
 17 | 
 18 | if ($all) {
 19 |     $reg = $true
 20 |     $procs = $true
 21 |     $files = $true
 22 | }
 23 | 
 24 | # Menu / Helper stuff
 25 | Write-Output "VBoxCloak.ps1 by @d4rksystem (Kyle Cucci)"
 26 | Write-Output "Usage: VBoxCloak.ps1 -<option>"
 27 | Write-Output "Example Usage: VBoxCloak.ps1 -all"
 28 | Write-Output "Options:"
 29 | Write-Output "all: Enable all options."
 30 | Write-Output "reg: Make registry changes."
 31 | Write-Output "procs: Kill processes."
 32 | Write-Output "files: Make file system changes."
 33 | Write-Output "`nTips: Run as Admin or you will get a lot of errors!"
 34 | Write-Output "Warning: Only run in a virtual machine!"
 35 | Write-Output "Warning: This script will likely temporarily break some functions like snapshots."
 36 | Write-Output "*****************************************"
 37 | 
 38 | # -------------------------------------------------------------------------------------------------------
 39 | # Define random string generator function
 40 | 
 41 | function Get-RandomString {
 42 | 
 43 |     $charSet = "abcdefghijklmnopqrstuvwxyz0123456789".ToCharArray()
 44 |     
 45 |     for ($i = 0; $i -lt 10; $i++ ) {
 46 |         $randomString += $charSet | Get-Random
 47 |     }
 48 | 
 49 |     return $randomString
 50 | }
 51 | 
 52 | # -------------------------------------------------------------------------------------------------------
 53 | # Stop VBox Processes
 54 | 
 55 | $process_list = "VBoxTray", "VBoxService", "VBoxControl"
 56 | 
 57 | if ($procs) {
 58 | 
 59 |     Write-Output "`n[*] Attempting to kill VMware processes..."
 60 | 
 61 |     foreach ($p in $process_list) {
 62 | 
 63 |         $process = Get-Process "$p" -ErrorAction SilentlyContinue
 64 | 
 65 |         if ($process) {
 66 |             $process | Stop-Process -Force
 67 |             Write-Output "[+] $p process killed!"
 68 |         }
 69 | 
 70 |         if (!$process) {
 71 |             Write-Output "[!] $p process does not exist!"
 72 |         }
 73 |      }        
 74 | }
 75 | 
 76 | # -------------------------------------------------------------------------------------------------------
 77 | # Modify VBox registry keys - Refactored with loops
 78 | 
 79 | if ($reg) {
 80 | 
 81 |     # Registry properties to modify (Set-ItemProperty)
 82 |     $propertiesToModify = @(
 83 |         @{ Path = "HKLM:\HARDWARE\Description\System"; Name = "SystemBiosVersion" },
 84 |         @{ Path = "HKLM:\HARDWARE\Description\System"; Name = "SystemBiosDate" },
 85 |         @{ Path = "HKLM:\HARDWARE\Description\System"; Name = "VideoBiosVersion" },
 86 |         @{ Path = "HKLM:\SYSTEM\CurrentControlSet\Control\SystemInformation"; Name = "BIOSVersion" },
 87 |         @{ Path = "HKLM:\SYSTEM\CurrentControlSet\Control\SystemInformation"; Name = "BIOSReleaseDate" },
 88 |         @{ Path = "HKLM:\SYSTEM\CurrentControlSet\Control\SystemInformation"; Name = "BIOSProductName" },
 89 |         @{ Path = "HKLM:\HARDWARE\DEVICEMAP\Scsi\Scsi Port 0\Scsi Bus 0\Target Id 0\Logical Unit Id 0"; Name = "Identifier" }
 90 |     )
 91 | 
 92 |     # Registry keys to rename (Rename-Item)
 93 |     $keysToRename = @(
 94 |         @{ Path = "HKLM:\SOFTWARE\Oracle\VirtualBox Guest Additions" },
 95 |         @{ Path = "HKLM:\HARDWARE\ACPI\DSDT\VBOX__" },
 96 |         @{ Path = "HKLM:\HARDWARE\ACPI\FADT\VBOX__" },
 97 |         @{ Path = "HKLM:\HARDWARE\ACPI\RSDT\VBOX__" },
 98 |         @{ Path = "HKLM:\SYSTEM\ControlSet001\services\VBoxMouse" },
 99 |         @{ Path = "HKLM:\SYSTEM\ControlSet001\services\VBoxService" },
100 |         @{ Path = "HKLM:\SYSTEM\ControlSet001\services\VBoxSF" },
101 |         @{ Path = "HKLM:\SYSTEM\ControlSet001\services\VBoxVideo" },
102 |         @{ Path = "HKLM:\SYSTEM\ControlSet001\services\VBoxGuest" },
103 | 	@{ Path = "HKLM:\SYSTEM\ControlSet001\Enum\ACPI\PNP0C0C" },
104 |         @{ Path = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Oracle VM VirtualBox Guest Additions" }
105 |     )
106 | 
107 |     # Registry property names to rename (Rename-ItemProperty)
108 |     $propertyNamesToRename = @(
109 |         @{ Path = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run"; Name = "VBoxTray" }
110 |     )
111 | 	
112 |     # Process registry properties to modify
113 |     Write-Output "`n[*] Modifying registry property values..."
114 |     foreach ($property in $propertiesToModify) {
115 |         if (Get-ItemProperty -Path $property.Path -Name $property.Name -ErrorAction SilentlyContinue) {
116 |             Write-Output "[+] Modifying $($property.Path)\$($property.Name)..."
117 |             Set-ItemProperty -Path $property.Path -Name $property.Name -Value $(Get-RandomString) -ErrorAction SilentlyContinue
118 |         } else {
119 |             Write-Output "[!] Property $($property.Path)\$($property.Name) does not exist! Skipping..."
120 |         }
121 |     }
122 | 
123 |     # Process registry keys to rename
124 | 	Write-Output "`n[*] Renaming registry keys..."
125 | 	foreach ($key in $keysToRename) {
126 | 		if (Get-Item -Path $key.Path -ErrorAction SilentlyContinue) {
127 | 			Write-Output "[+] Renaming key $($key.Path)..."
128 | 			Rename-Item -Path $key.Path -NewName $(Get-RandomString) -ErrorAction SilentlyContinue
129 | 		} 	else {
130 |         Write-Output "[!] Key $($key.Path) does not exist or has already been renamed! Skipping..."
131 |     }
132 | }
133 | 
134 |     # Process registry property names to rename
135 |     Write-Output "`n[*] Renaming registry property names..."
136 |     foreach ($propertyName in $propertyNamesToRename) {
137 |         if (Get-ItemProperty -Path $propertyName.Path -Name $propertyName.Name -ErrorAction SilentlyContinue) {
138 |             Write-Output "[+] Renaming property $($propertyName.Path)\$($propertyName.Name)..."
139 |             Rename-ItemProperty -Path $propertyName.Path -Name $propertyName.Name -NewName $(Get-RandomString) -ErrorAction SilentlyContinue
140 |         } else {
141 |             Write-Output "[!] Property $($propertyName.Path)\$($propertyName.Name) does not exist or has already been renamed! Skipping..."
142 |         }
143 |     }
144 | 
145 |     Write-Output "`n[*] Registry modifications completed."
146 | }
147 | 
148 | # -------------------------------------------------------------------------------------------------------
149 | # Rename VBox Files
150 | 
151 | if ($files) {
152 | 	
153 | 	# Rename driver files
154 | 	
155 | 	$file_list = "VBoxMouse.sys", "VBoxSF.sys", "VBoxWddm.sys", "VBoxGuest.sys"
156 | 
157 | 	Write-Output "`n[*] Attempting to rename VirtualBox driver files..."
158 | 
159 |     foreach ($f in $file_list) {
160 | 		Write-Output "[+] Attempting to rename $f..."
161 | 		try {
162 | 			Rename-Item "C:\Windows\System32\drivers\$f" "C:\Windows\System32\drivers\$(Get-RandomString).sys" -ErrorAction Stop
163 | 		}
164 | 		catch {
165 | 			Write-Output "[!] File does not seem to exist! Skipping..."
166 | 		}
167 | 	}
168 | 
169 | 	# Rename system32 executable files
170 | 	
171 | 	Write-Output "`n[*] Attempting to rename System32 VirtualBox executable files..."
172 | 	
173 | 	$file_list = "VBoxTray.exe", "VBoxControl.exe", "VBoxService.exe", "VBoxMRXNP.dll", "VBoxSVGA.dll", "VBoxHook.dll", "VBoxNine.dll", "VBoxGL.dll", "VBoxDispD3D.dll", "VBoxICD.dll"
174 | 
175 |     foreach ($f in $file_list) {
176 |     	Write-Output "[+] Attempting to rename $f..."
177 | 		try {
178 | 			Rename-Item "C:\Windows\System32\$f" "C:\Windows\System32\$(Get-RandomString).sys" -ErrorAction Stop
179 | 		}
180 | 		catch {
181 | 			Write-Output "[!] File does not seem to exist! Skipping..."
182 | 		}
183 | 	}
184 | 	
185 | 	# Rename SysWOW64 executable files
186 | 	
187 | 	Write-Output "`n[*] Attempting to rename SysWOW64 VirtualBox executable files..."
188 | 	
189 | 	$file_list = "VBoxGL-x86.dll", "VBoxMRXNP.dll", "VBoxDispD3D-x86.dll", "VBoxICD-x86.dll", "VBoxSVGA-x86.dll", "VBoxNine-x86.dll"
190 | 
191 |     foreach ($f in $file_list) {
192 |     	Write-Output "[+] Attempting to rename $f..."
193 | 		
194 | 		try {
195 | 			Rename-Item "C:\Windows\SysWOW64\$f" "C:\Windows\SysWOW64\$(Get-RandomString).sys" -ErrorAction Stop
196 | 		}
197 | 		
198 | 		catch {
199 | 			Write-Output "[!] File does not seem to exist! Skipping..."
200 | 		}
201 | 	}
202 | 
203 | 	# Rename program directory
204 | 
205 | 	Write-Output "[+] Attempting to rename VirtualBox program directory..."
206 | 	
207 | 	$vboxDir = Get-ChildItem "C:\Program Files\Oracle\VirtualBox*"
208 | 	
209 | 	# Check for existence of files.
210 | 	if ($vboxDir) {
211 | 	
212 | 		Rename-Item "C:\Program Files\Oracle\VirtualBox Guest Additions" "C:\Program Files\Oracle\$(Get-RandomString)" -ErrorAction SilentlyContinue
213 | 	}
214 | 	
215 | 	else {
216 | 		Write-Output "[!] Directory does not appear to exist! Skipping..."
217 | 	}
218 | }
219 | 
220 | Write-Output ""
221 | Write-Output "** Done! Did you recieve a lot of errors? You need to run as Admin!"
222 | Write-Output "** Spot any bugs or issues? DM me on Twitter or open an issues on Github! :)"
223 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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270 |   12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
278 | POSSIBILITY OF SUCH DAMAGES.
279 | 
280 |                      END OF TERMS AND CONDITIONS
281 | 
282 |             How to Apply These Terms to Your New Programs
283 | 
284 |   If you develop a new program, and you want it to be of the greatest
285 | possible use to the public, the best way to achieve this is to make it
286 | free software which everyone can redistribute and change under these terms.
287 | 
288 |   To do so, attach the following notices to the program.  It is safest
289 | to attach them to the start of each source file to most effectively
290 | convey the exclusion of warranty; and each file should have at least
291 | the "copyright" line and a pointer to where the full notice is found.
292 | 
293 |     <one line to give the program's name and a brief idea of what it does.>
294 |     Copyright (C) <year>  <name of author>
295 | 
296 |     This program is free software; you can redistribute it and/or modify
297 |     it under the terms of the GNU General Public License as published by
298 |     the Free Software Foundation; either version 2 of the License, or
299 |     (at your option) any later version.
300 | 
301 |     This program is distributed in the hope that it will be useful,
302 |     but WITHOUT ANY WARRANTY; without even the implied warranty of
303 |     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
304 |     GNU General Public License for more details.
305 | 
306 |     You should have received a copy of the GNU General Public License along
307 |     with this program; if not, write to the Free Software Foundation, Inc.,
308 |     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
309 | 
310 | Also add information on how to contact you by electronic and paper mail.
311 | 
312 | If the program is interactive, make it output a short notice like this
313 | when it starts in an interactive mode:
314 | 
315 |     Gnomovision version 69, Copyright (C) year name of author
316 |     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
317 |     This is free software, and you are welcome to redistribute it
318 |     under certain conditions; type `show c' for details.
319 | 
320 | The hypothetical commands `show w' and `show c' should show the appropriate
321 | parts of the General Public License.  Of course, the commands you use may
322 | be called something other than `show w' and `show c'; they could even be
323 | mouse-clicks or menu items--whatever suits your program.
324 | 
325 | You should also get your employer (if you work as a programmer) or your
326 | school, if any, to sign a "copyright disclaimer" for the program, if
327 | necessary.  Here is a sample; alter the names:
328 | 
329 |   Yoyodyne, Inc., hereby disclaims all copyright interest in the program
330 |   `Gnomovision' (which makes passes at compilers) written by James Hacker.
331 | 
332 |   <signature of Ty Coon>, 1 April 1989
333 |   Ty Coon, President of Vice
334 | 
335 | This General Public License does not permit incorporating your program into
336 | proprietary programs.  If your program is a subroutine library, you may
337 | consider it more useful to permit linking proprietary applications with the
338 | library.  If this is what you want to do, use the GNU Lesser General
339 | Public License instead of this License.
340 | 


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