Check the Return-Path and From fields. In many versions of this challenge:
The most critical part of the file is the Received chain. These headers track the path the email took from the sender to the recipient. mail access_4.txt
The Return-Path or the actual sending server in the Received header reveals a different, malicious domain. 3. Locate the Flag/Credential Depending on the specific platform: Check the Return-Path and From fields
In this challenge, you are provided with a text file containing raw email logs. The objective is usually to identify the of a suspicious login or the spoofed sender of a phishing email. 1. Examine the Received Headers The Return-Path or the actual sending server in
: Often an IP from a known malicious range or a private network address that shouldn't be sending external mail.
: The answer is often the IPv4 address found in the first Received hop (e.g., 192.168.x.x ).
: Scan for fields like from [IP ADDRESS] or (authenticated bits=0) . 2. Identify the Forged Sender