DDoS attacks detection in wireshark

Yes, it may be possible if you're capturing traffic to this group of servers. DDoS attacks often are "simple" SYN floods coming from apparently all over the world. To determine where a packet is coming from you can enable the GeoIP localisation in the Name Resolution settings in the Wireshark preferences after you've placed the according files (available for free from www.maxmind.com) in a directory.

After you've successfully pointed Wireshark to the database files you can see the location of IPs in the IP decode (you might need to enable this in the protocol preferences first) and in the Endpoint statistics. If you see many packets flooding your servers from seemingly random sources you're probably being DDoSed.