Unauthorized Shell Opening

Unauthorized Shell Opening (Unix/Linux)

The following out-of-the-box alert rules are assigned to the (Unix/Linux) Category: UNAUTHORIZED SHELL OPENING.

ALERT RULE

Description

Opening a shell by unauthorized application user

An alert is triggered upon detecting a login of an unauthorized application user such as apache web server (that is authorized to run a web server but not to open a shell).

Opening an interactive shell by Apache

An alert is triggered upon detecting an interactive shell that is opened by Apache web server. This rule is an example of a Prevent Rule on login (by catching any executed command). This rule will not trigger any alert until it is activated.

Opening root shell using SUDO command

An alert is triggered upon executing the SUDO command which allows executing programs with security privileges of regular users or super users.