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I have done the following: 1. Open .pcapng file in Wireshark and in Packet Details right click on password I needed to change and "Copy | as Hex stream" to copy the HEX value. 2. On my Ubuntu 22.10 laptop I have installed Okteta hex editor. 3. In Okteta from menu File | Open and select .pcapng file. 4. Menu Edit | Replace. In Find field I have pasted the hex string from step one and in Replace sting I typed in hex string of desired changed news password. 5. Menu File | Save to save a file. 6. Opened changed file in Wireshark and file opens without an issue and password is successfully changed.

I have done the following: 1. following:

  1. Open .pcapng file in Wireshark and in Packet Details right click on password I needed to change and "Copy | as Hex stream" to copy the HEX value. 2. value.

  2. On my Ubuntu 22.10 laptop I have installed Okteta hex editor. 3. editor.

  3. In Okteta from menu File | Open and select .pcapng file. 4. file.

  4. Menu Edit | Replace. In Find field I have pasted the hex string from step one and in Replace sting I typed in hex string of desired changed news password. 5. password.

  5. Menu File | Save to save a file. 6. file.

  6. Opened changed file in Wireshark and file opens without an issue and password is successfully changed.