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Introducing MailSniper: A Tool For Searching Every User's Email for Sensitive Data

posted Sep 29, 2016, 6:52 AM by Beau Bullock
TL;DR
MailSniper is a penetration testing tool for searching through email in a Microsoft Exchange environment for specific terms (passwords, insider intel, network architecture information, etc.). It can be used as a non-administrative user to search their own email, or by an Exchange administrator to search the mailboxes of every user in a domain.

MailSniper is available for download here: https://github.com/dafthack/MailSniper

Overview
Oftentimes, on penetration tests we find ourselves having elevated access (Domain Admin) within an organization. Some firms stop there thinking that DA is the end goal. But it’s not. “Getting DA” means nothing to most members of the C-suite level if you can’t provide a picture of what that means in terms of risk. One of the best ways to demonstrate risk to an organization is to show the ability to gain access to sensitive data. Sensitive data to an organization varies greatly from company to company. Some common examples of sensitive data are: customer information, credit card numbers, Social Security numbers, employee information, intellectual property, industrial control systems/SCADA, health care data, etc.

According to the 2016 Mandiant M-Trends Report (PDF) in 2015 the median number of days organizations were compromised before they detected the breach was 146. Having that much time inside of any network allows attackers to slowly and stealthily gain operational awareness, determine what the organization deems sensitive data, locate sensitive data on the network, compromise sensitive data, and ultimately exfiltrate it. How do we as pentesters go about providing that same illustration in terms of risk to an organization when we typically only have less than 5 days to complete an assessment?

In this blog post I will detail a new tool I have developed to assist in the location of sensitive data on a network by searching through every employee’s email for specific terms. The tool is called MailSniper.

...Continue reading on the Black Hills Blog here: http://www.blackhillsinfosec.com/?p=5296
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