Copy this block in your theme:

add_filter('vibe_builder_thumb_styles','custom_vibe_builder_thumb_styles');
add_filter('vibe_featured_thumbnail_style','custom_vibe_featured_thumbnail_style',1,3);
function custom_vibe_builder_thumb_styles($styles){
$styles['modern_block'] = VIBE_CHILD_URL.'/thumb_modern.png';
return $styles;
}
function custom_vibe_featured_thumbnail_style($thumbnail_html,$post,$style){
if($style == 'modern_block'){
$thumbnail_html ='';
$thumbnail_html .= '<div class="block modern_course">';
$thumbnail_html .= '<div class="block_media">';
$thumbnail_html .= '<a href="'.get_permalink($post->ID).'">'.get_the_post_thumbnail($post->ID,'medium').'</a>';
$thumbnail_html .= '</div>';
$thumbnail_html .= '<div class="block_content">';
$thumbnail_html .= '<h4 class="block_title"><a href="'.get_permalink($post->ID).'" title="'.$post->post_title.'">'.$post->post_title.'</a></h4>';
$thumbnail_html .= '<span>';
$thumbnail_html .= get_the_term_list($post->ID,'course-cat','',',');
$thumbnail_html .= '</span>';
$thumbnail_html .= '<div class="course_meta">
<i class="icon-users"></i> '.get_post_meta($post->ID,'vibe_students',true).'
'.bp_course_get_course_credits().'
</div>';
$thumbnail_html .= '';
$thumbnail_html .= '</div></div>';
}
return $thumbnail_html;
}
CSS for this block :
.block.modern_course{
border: 1px solid #EFEFEF;
border-radius: 2px;
text-align:left;
}
.block.modern_course .block_content {
position: relative;min-height:140px;
padding: 5px 15px 5px;
}
.block.modern_course h4+span{
font-size: 12px;
color: #bbb;
font-style: italic;
line-height:1.2;
}
.block.modern_course .course_meta{
color:#bbb;
position: absolute;
position: absolute;
width: 100%;
left: 0;
padding: 0 20px;
bottom: 10px;
}
.block.modern_course .course_meta i{
font-size: 16px;
float: left;
margin-right: 5px;
}
.block.modern_course .course_meta strong{
float: right;
color: #70c989;
}