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LetsDefend Write up Disclose The Agent
LetsDefend - Disclose The Agent#
Created: 16/01/2024 09:34 Last Updated: 25/01/2024 13:07
Disclose The Agent
We reached the data of an agent leaking information. You have to disclose the agent.
Log file: https://files-ld.s3.us-east-2.amazonaws.com/smtpchallenge.zip Pass: 321
Note: pcap file found public resources.
Start Investigation#
We got a pcap file to work with so let’s roll!
First thing I checked is the Protocol Hierarchy Statistics and there are a lot of SMTP packets were captured and there are some of Syslog, NetBIOS, SMB, and ARP Protocol as well.
SMTP conversation caught my eyes right away when I examined this pcap file, I saw login credential and some emails.
Follow the TCP stream we can see the message of the email.
Look like Ann wrote this email as we seen in From: "Ann Dercover" <sneakyg33k@aol.com>
And the recipient is sec558@gmail.com
She’s talking about Lunch, let’s find out if there is another email were captured
There it is an email from Ann to mistersecretx@aol.com
Look like they’re planning to go to a date, so this mistersecretx is the Ann’s secret boyfriend.
An attachment was also sent with this email.
I used NetworkMiner to extract the attachment
An attachment is a picture of location they decided to meet up, It’s in Mexico
There are nothing more to be dig up so let’s answer the questions
What is the email address of Ann’s secret boyfriend?
1mistersecretx@aol.comWhat is Ann’s email password?
1558r00lzWhat is the name of the file that Ann sent to his secret lover?
1secretrendezvous.docxIn what country will Ann meet with her secret lover?
1MexicoWhat is the MD5 value of the attachment Ann sent?
19e423e11db88f01bbff81172839e1923
Summary#
2 emails was captured in SMTP communication, first email content is about telling a friend that Ann can’t do lunch next week because She was heading out of towns and the second email told us that out of town Ann was heading to is in Mexico and Ann was going there with her secret boyfriend that she sent out a location with an email attachment.
- No Badge for this challenge
LetsDefend Write up Disclose The Agent
https://mranv.pages.dev/posts/letsdefend-write-up-disclose-the-agent/