tshark -r capture.pcap -Y "tcp.payload contains PK\x03\x04" -T fields -e data | xxd -r -p > output.zip
Note that while the Wireshark executable can run from a ZIP folder, you still need a packet capture driver (Npcap for Windows) installed on the system to capture live traffic. Without it, you can only use the portable version to analyze existing trace files. Importing Configuration and Coloring Rules wireshark zip
Using the search function ( Ctrl+F ) and switching the search type to . Searching for the string 504b0304 . Extracting ZIP Files from a Capture tshark -r capture
Or, for HTTP uploads/downloads:
: When you save a file, you can choose the .pcapng.gz format. you can choose the .pcapng.gz format.