[Foreigner]

Код:

@echo off
setlocal

pushd "C:\Folder"

set "prefix=http://mysyte.com/wp-content/uploads/"
set "postfix=_.jpg"

for %%i in (*cort_*) do (

    1>>1.txt echo %prefix%%%i%postfix%
    for /f "tokens=2 delims=_" %%j in ("%%i") do 1>>2.txt echo %%j

)

popd