Wireshark Cheat Sheet

Network protocol analyzer. It uses the pcapng file format.

Settings

Datetime Format When Packets Sent

Select “View → Time Display Format → Date and Time of Day”.

Filters

Enter the following text in a filtering form.

Datetime

frame.time >= "Jan 2, 2023 08:00:00" && frame.time <= "Jan 5, 2023 08:00:00"

DNS

dns
udp.port == 53

# Record type
dns.qry.type == 1   # A record
dns.qry.type == 2   # NS record
dns.qry.type == 5   # CNAME record
dns.qry.type == 6   # SOA record
dns.qry.type == 15  # MX record
dns.qry.type == 16  # TXT record
dns.qry.type == 28  # AAAA record
dns.qry.type == 252 # AXFR

# Query name
dns.qry.name matches "example.com"

# Reponse
dns.flags.response == 0 # No response

FTP

ftp
ftp-data

HTTP & HTTPS

# HTTP
http
tcp.port == 80

# HTTPS
ssl
tcp.port == 443

tcp.port == 80 || tcp.port == 443

# Methods
http.request.method == GET
http.request.method == POST

# Domains
http.host matches "example.com"
http.host == "example.com"

ICMP

icmp

IP Address

ip.addr == 10.0.0.1
ip.addr != 10.0.0.2
ip.addr == 10.0.0.1 && ip.addr == 10.0.0.2
ip.src == 10.0.0.1
ip.dst == 10.0.0.2
ip.src == 10.0.0.1 && ip.dst != 10.0.0.0/24

SMB

smb
smb2

SMTP

smtp
smtp.req.parameter contains "FROM"

SSH

ssh
tcp.port == 22

Detailed Information

1. Right click on the row item.

2. Select Follow -> TCP Stream. Another window opens.

3. Find information by clicking the arrow on the right of "Stream *".

More Information

• Analyze -> Expert Information

  Read the expert information.

• Statistics -> Capture File Properties

  Read the capture file comments.

• Statistics → Conversations

  List IP conversations. We can find IP addresses involved in the traffic.

• Statistics → Protocol Hierarchy

  Show usage of ports and services.

• View -> Name Resolution

  Resolve IP addresses.

Data Exfiltration via DNS

1. Enter "dns" in filter form

2. If you found a domain such as follow, you may be able to retrieve threats.

   93616e64792043...2038343931.vulnerable.com

3. For example, decode "936...".

Data Exfiltration via HTTP

1. Open File -> Export Objects -> HTTP... .

2. Click "Save all".

3. Analyze steganographic files using tools like steghide.

WiFi Handshakes

When importing pcap file, then if we found the capture file is about WiFi handshakes, we can crack the WiFi password using this file.

aircrack-ng example.pcap -w wordlist.txt