WireShark > File > {pcap1.pcap}
WireShark > Edit > Find Packet
Source: {Packet List | Packet Details | Packet Bytes}
Search Type: {Narrow & Wide | Narrow (UTF-8 / ASCII) | Wide (UTF-16)
Case Sensitive: Enabled/Disabled
Input Type: {Display filter | Hex | String | Regex}
Input: {arbitrary}