Network SecurityLevel 2★★☆☆☆35 pts
Network Analysis - Plaintext SMTP Attachment
MissionThe internal host 10.30.0.25 sent an email to port 25 of the mail server 10.30.0.10 without encryption. Download traffic.pcap from the top page, extract the confidential memo attached to the email (secret-memo.txt) and find the token (flag) written in it.
Hints
Hint 1Show
Right-click an SMTP packet and choose Follow > TCP Stream to read the message after DATA
Hint 2Show
Attachments are encoded with Content-Transfer-Encoding: base64. meeting-notes.txt is a decoy
Hint 3Show
Remove the line breaks from the Base64 of secret-memo.txt and decode it with base64 -d to reveal the token: line
