Reverse Engineering Notes - TCP Dump

 

To capture network packets for a specific process or thread in Linux you can use a tool called tcpdump.

The tcpdump command can be used to capture network traffic on a Linux system. By default, tcpdump captures all network traffic on the system. However, it is possible to capture traffic for a specific process or thread by using the -p flag followed by the process or thread ID.

Here is an example command to capture network traffic for a specific process or thread:

csharp

sudo tcpdump -i <interface> -p -s0 -w <output-file> '(udp or tcp) and (dst port <port>) and ( (pid <process-id>) or (thread <thread-id>) )'

• <interface>: Name of the network interface to capture packets on, such as eth0 or wlan0.
• <output-file>: Name of the file to write the captured packets to.
• <port>: The port number used by the process or thread to communicate over the network.
• <process-id>: The process ID of the process to capture packets for.
• <thread-id>: The thread ID of the thread to capture packets for.

Note that capturing network traffic requires root privileges, so you may need to run the command with sudo. Also, the tcpdump command may not be installed by default on your Linux system, so you may need to install it using your package manager before using it.

cmd:

sudo tcpdump -i <interface> -p -s0 -w <output-file> '(udp or tcp) and (dst port <port>) and ( (pid <process-id>) or (thread <thread-id>) )'