![]() Threat actors may also use masquerading to make the registry entries look as if they are associated with legitimate programs. Threat actors can use these configuration locations to execute malware to maintain persistence through system reboots. HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce Please note that this suggests to another trick to anti-VM (VirtualBox) HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run The following run keys are created by default on Windows Systems: It displays the entries in the order in which Windows processes them, and includes any programs that are in the startup folder, or Registry keys such as Run. These apps will be executed under the context of the user and will have the account’s associated permissions level. run keysĪdding an entry to the “run keys” in the registry will cause the app referenced to be executed when a user logs in. Today I’ll write about the result of my own research into the “classic” persistence trick: startup folder registry keys. This post starts a series of articles on windows malware persistence techniques and tricks. Hello, cybersecurity enthusiasts and white hackers! Restart your computer, give it a few seconds to properly load and you will see now that you can type in the Windows 10 Start Menu as you would usually do.Malware development: persistence - part 1. You need now to cut the recently created shortcut in the desktop and paste it in the StartUp directory like this: This will open the file explorer in a specific directory ( C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp). ![]() As first, create a Shortcut of the ctfmon.exe and send it to the desktop (you can find the executable in the following directory C:\Windows\System32 ):Īfter creating the shortcut, launch a new run dialog pressing Window R and type the following command ( Shell:common startup): If you are not into the command line world, then don't worry, there's a graphical way to do this without touching the registry of Windows. Restart the computer, give it a few seconds to properly load and you will see now that you can type in the Windows 10 Start Menu as you would usually do. In the registry editor, navigate to the mentioned key ( HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run) where you will find the entry: You can open the registry editor pressing Window R and typing regedit: The Registry Editor opens, divided into two parts. To do this, press the Windows key (the one with the emblem) R on the keyboard, and in the Run window that appears, type regedit and press Enter or Ok. The data value for a key is a command line no longer than 260 characters (if you don't have administrator rights, when using the command you will get the message ERROR: Access is denied):Īfter running the instruction, you can verify that the key has been created by opening the Registry Editor (you will get a message as well that says The operation completed successfully). Registry Keys Responsible for Startup Programs First, you need to open the registry editor. Once the new key is created, rename it Serialize. Right-click on Explorer and then select Key from the New option. In the registry editor, go to: Computer\ HKEYCURRENTUSER \Software\Microsoft\Windows\CurrentVersion\Explorer. What it basically does is to create a new registry in the Run Registry Key causing the specified programs to run each time that a user logs on. Open the registry editor by hitting the Win key then typing regedit. Launch a new command prompt as administrator (important), you can find the command prompt executable in the following directory ( C:\Windows\System32):Īnd type the following instruction: REG ADD HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v ctfmon /t REG_SZ /d "C:\Windows\system32\ctfmon.exe" The first option solves the problem with the execution of a single command in your command prompt. We will share with you 2 options to guarantee the startup of ctmon.exe in Windows 10. ![]() To fix this problem, you only need to make sure that this program starts every time you start windows automatically. After some research it all pointed that the service required to make this work wasn't starting automatically (this failure is caused by the CTF loader or the ctfmon.exe file that is on your computer). When Windows starts and I try to unlock it with the spacebar, it didn't work either. ![]() Even though I checked out some additional tips on looking for files and apps in Windows, basic stuff like opening the photo viewer and changing to the next one with the keyboard using the arrows didn't work either. The first thing I noticed is that when launching the start menu and quickly typing to search an app, it simply didn't work. The infection messed up a lot of basic things that used to work on my computer. Unfortunately a couple of weeks ago, my computer got a Virus when installing a program and removed it using MalwareBytes Antimalware:
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