You can use Bootstrap 4 new flexbox utility classes. The class is d-flexused to display:flex, and then flex-columnused to set flex-direction: column..
<div class="container">
<section class="hero">
<div class="row">
<div class="col col-md-8"><img src="" alt=""></div>
<div class="col col-md-4 d-flex flex-column">
<div class="contentMy h-100">somthing</div>
<div class="contentMy h-100">somthing</div>
<div class="contentMy h-100">somthing</div>
<div class="contentMy h-100">somthing</div>
</div>
</div>
</section>
</div>
http://www.codeply.com/go/YyTEyi4IcU