![]() ![]() Use regular user account, try to use privilges instead of adding it to "Administrators" group ( (v=vs.85).I am sure there are lots of places in registry I do not know about. In theory, you may try to stop it my denying your user to write to registry hives I mentioned here, but list is not complete. It may me installed anywhere (including %TEMP%) and then add link in your registry. It may be assumed that the active user is always logged-in as standard, local user (not as an administrator) on Windows 10 and that write access is specifically denied to that user, using NTFS' security features. So, asnwering your queestion: NTFS permissions have nothing to do with ransomware. Add itself right after autochk (or even patch it!) in BootExecute key in HKLM\SYSTEM\CurrentControlSet\Control\Session Manager (may update another control sets as well), so it will be launched at early boot stage and install itself somewhere. ![]() Use group policy (physically stored in %SYSTEMROOT%\System32\GroupPolicy) to update registry and add itself there again.This hive was created for debuggers, but may be used by ransomware.Įven if you clean your registry, malware can: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\: it may add ransomware dll for userinit or winlogon or explorer to be loaded with process. HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon one may fake userinit here and winlogon will launch it. HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run: one may launch ransomware and then disable task manager (CTRL+ALT+DEL) with policy (set 1 in HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskmgr) and display itself in full screen mode. ![]() There are infinite number of places ransomware may install itself in Windows. Of course, it is always better to adapt this strategy in addition to " fully patched OS, fully patched AV, high frequency offline backups and high frequency off-site backups" as mentioned in the comments to other answers.
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