To launch a DLL hijack, a cybercriminal just needs to deposit a payload DLL into the directory of a targeted application. This technique is also known as DLL search order hijacking. If a cybercriminal deposits an infected DLL file in this location, the application will open it instead of the original because its location was searched first, before the system directory. Regardless of whether or not safe search is enabled, the directory from which the application is launched is the first location that is searched. This is the exploit that makes DLL hacking possible.įor example, if a Windows application requires a DLL file located in the system directory C:\Windows\System32 but there are no instructions in its code to search in this explicit location, the application will work through a DLL search order to locate the file. Windows applications will default to any one of the above DLL search protocols if an application does not specify the full path of associated DLL files. When safe search is disabled, the user's current directory is slightly elevated in the search order. The difference between the two search modes is the order in which the user's current directory is searched, it's slightly elevated in the hierarchy when safe search is disabled.
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