powershellbatch-filehybrid

batch file problem: pass powershell variable to batch

i have this hybris batch/powershell base64 decoder and i want to decode the string in powershell and set the decoded variable to a variable in batch, this is my code

@echo off
set syscall=dGVzdGluZ3hk
powershell.exe $decoded=[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($env:syscall));
Solution

  • Use a for /f statement to capture the output from a command (run for /? in a cmd.exe session for more information):

    @echo off
set "syscall=dGVzdGluZ3hk"
for /f "usebackq delims=" %%i in (`powershell.exe -noprofile -c "[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($env:syscall))"`) do set "decoded=%%i"

    After executing the above, %decoded% contains testingxd.