Abusing Exchange Mailbox Permissions with MailSniper
Summary
This article details how attackers can abuse Exchange mailbox permissions to gain unauthorized access to sensitive data. It explains that users can grant different access levels to mailbox folders, and a tool called MailSniper can be used to discover and exploit these permissions.
IFF Assessment
The article describes a technique and tool that can be used by malicious actors to gain unauthorized access to sensitive information within an organization's email system.
Defender Context
Defenders should be aware of how Exchange mailbox permissions can be misused. Regularly auditing these permissions, especially for shared mailboxes and service accounts, is crucial. Implementing principle of least privilege for mailbox access can mitigate the risks associated with tools like MailSniper.