batch file problem: pass powershell variable to batch

Question

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));

Please do not vandalize posts on Stack Overflow, including your own. Content is licensed here under CC-BY-SA 4.0. — TylerH
– TylerH, Commented Aug 11, 2021 at 15:28

mklement0 · Accepted Answer · 2021-08-08 20:47:21Z

4

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.

answered Aug 8, 2021 at 20:47

mklement0

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4 Comments

Abraham Zinala Over a year ago

Do you know any big programming language(s)?

mklement0 Over a year ago

@AbrahamZinala, what makes a programming language big?

Abraham Zinala Over a year ago

The more well-known, such as the low-level languages.

mklement0 Over a year ago

@AbrahamZinala I've worked with C and C++ in the past, but it's been many, many years.

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