#Rundll32 exe s code
Executing malicious code as a DLL allows an adversary to keep their malware from appearing directly in a process tree, as a directly executed EXE would. This necessity and ubiquity makes Rundll32 an attractive target for adversaries intent on blending in.įrom a practical standpoint, Rundll32 enables the execution of native dynamic link libraries (DLL).
#Rundll32 exe s windows
It is a functionally necessary component of the Windows operating system that can’t be simply blocked or disabled. PowerShell: Get-CIMinstance - Get WMI information.Like many of the most prevalent ATT&CK techniques, Rundll32 is a native Windows process that’s installed by default on nearly every Microsoft computer dating back to Windows 95. WMIC PRINTER - Set printing options through WMI. PRNMNGR - Add, delete, list printers and printer connections. If you're poor, you need a library” ~ John Kenneth Galbraith
this is an unsupported hack, which may fail in the future - details on oldnewthing Where number is one (or several added) of the following values:Ģ56 Do not Show GUI when running the cache clearĥ12 Do not use Multi-threading for deletionġ024 Valid only when browser is in private browsing modeĨ192 Preserve Cached data for Favorite websites RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess number RUNDL元2 printui.dll,PrintUIEntry /ge /c"\\workstation64"ĭisplay all the available commands for PRINTUI.DLL - add/remove print drivers, print queues, preferences, properties etc: Rundll32 printui.dll,PrintUIEntry /ga /n\\Server\PrintShareĭisplay the per-Machine printer connections: f "%windir%\inf\ntprint.inf" /r "lpt1:" /m "AGFA-AccuSet v52.3"Īdd a printer connection that's available to anyone who logs on: RUNDL元2 printui.dll,PrintUIEntry /if /b "Test Printer" /c\\SERVER h "Intel" /v "Windows 2000" /f %windir%\inf\ntprint.inf RUNDL元2 printui.dll,PrintUIEntry /ia /c\\server /m "AGFA-AccuSet v52.3" There are often more robust methods to achieve the same thing such as Start Run commands or Shell: folder shortcuts.
This means there is a chance they may stop working (or start working in a different way) after some future Windows update. The internet has many lists of Rundll32 'cheat codes', that do mostly work, but many are calling an invalid or missing function signature. It can be used generally but requires the DLL being called to include a suitable function signature to match the operation you are calling. Rundll32 was originally designed only for internal use at Microsoft. If you pass the wrong type of DLL to Rundll32, it may fail to run without returning any error message. Rundll32.exe shell32.dll,Control_RunDLL Intl.cpl,1ĭLL options may be case sensitive, Rundll32 may also fail if there is any additional white space in between the dll_name, the comma, and the EntryPoint function.
In some cases two or more commas are required, for example here we pass the value 1 as the second argument to Intl.cpl: The dll_name and the EntryPoint function name can be separated by either a space ( ) or a comma (,)
#Rundll32 exe s full
RUNDL元2.EXE dll_name, EntryPoint ĭll_name A full path to the DLL to ensure that the correct one is found.įor best results, use the short file name.ĮntryPoint The name of the entry point function.
#Rundll32 exe s 32 bit
Rundll32 is available on all version of Windows from Windows 95 onwards, but only runs in 32 bit mode.
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