User Behavior Analytics

The Investigate | User Behavior Analytics page displays security-related information on individual users via its sensors and connectors. Stellar Cyber's user behavior analytics (UBA) is based on machine learning to analyze traffic and produce security status and event information. Details for how data is selected in the individual tabs and charts are described below.

The data displayed by the components described below is subject to the Filter settings at the top of the screen.

Tabs

Click on one of the tabs to see:

  • Overview—a summary of user analytics

  • Users—data on specific users. Also provides access to User Details for individual users.

  • Real ID—displays users with their various identities.

The Overview page lets you perform actions on the dashboard.

Dashboard Actions

You can perform the following actions on this dashboard:

  • Edit

  • Clone

  • Export

See the Dashboard Actions page for details on each action.

Overview

The overview dashboard provides a visual perspective of top users for aspects that may be of interest for further analysis.

The data in these charts differ from the Users table (described below) in that these are specific queries, while the user list is all observed users in the selected time period.

The charts are based on the following queries, subject to the Filter settings at the top of the screen.

  • The Top Active Users by Source Host chart queries the Traffic and Windows indices for srcip_username.

  • The Top Active Users by Destination Host chart queries the Traffic and Windows indices for dstip_username.

  • The Top Users with Alert chart queries the Alert index for srcip_username or dstip_username.

  • The Top 10 Users by Risk chart queries the Stellar Cyber's mongodb for the top 10 users that have largest risk score values.

Users

The Users dashboard lists the users that have been found through sources such as Active Directory, Microsoft Entra ID (formerly Azure AD), and Okta connectors, as well as via events seen by a Windows Server Sensor.

The data in this table differs from the Overview (described above) in that these are all observed users with a last seen timestamp occurring within the filtered time period.

The columns are:

  • Name—The name of the user as seen on the host. This field may be clicked to invoke the User Details display described in the following section.

  • Activity—The activity status of the user (Active, Inactive, Idle).

  • Risk Score—The risk associated with the user.

    The calculated user risk score is an overall assessment of how likely the user is going to be involved in a security breach. The user risk score:

    • is calculated every 10 minutes
    • includes open security events from the last 24 hours (if you close an event, it is removed from the next calculation)
    • considers the privilege level of users
    • weights many different alerts higher than large numbers of the same alert

  • Timestamp—The time of the last seen event.

  • Last Profile Changed—The time the user record was last updated.

  • Logon Time—If available, the time the user last logged in.

  • SID—The system ID detected for the user.

  • Data Sources—The different data sources from which information about this user was obtained (for example, windows_agent, active_directory, and so on).

  • Last Logoff Time—If available, the time the user last logged off the system.

  • Logon Count—The number of times a user has logged in.

  • Expires—The date and time that the user's authorization expires.

  • Last Bad Password Time—If it occurred, the last time that a login with this user name was attempted with a bad password.

  • Bad Password Count—The number of times this user name was attempted with a bad password.

  • Tenant Name—The name of the tenant associated with this user.

  • Sensor—The sensor that detected the activity.

  • Action—A button labeled "Details" that may be clicked to bring up the User Detail display.

Disable a User Action

  1. Click the icon to the right of a user in the table .

  2. Choose a Connector. from the drop-down. You can select either Active Directory or Microsoft Entra ID (formerly Azure Active Directory) connectors.

  3. Choose a Duration of either Forever or Limited. If you choose Limited, then enter Days, Hours, and Minutes.

  4. Choose a user name from the UserPrincipalName drop-down or type the name of the user to disable.

  5. Click Submit. The request to disable a user is sent.

Bulk Actions

You can perform bulk actions on a group of users. Click the check-boxes next to the users you want to modify. You can:

Adding a Tag

To tag a group of users:

  1. Click the check-boxes next to the users to which you want to add a tag.

  2. Choose tag in the bulk actions drop-down.

  3. Choose the tag to apply. You can also enter a new tag. The tag replaces an existing tag.

  4. Click Apply. The tag is immediately applied.

To remove a tag, simply apply a blank tag.

Adding a Location

To add a location to a group of users:

  1. Click the check-boxes next to the users to which you want to add a location.
  2. Choose location in the bulk actions drop-down.
  3. Choose the location to apply. You can also enter a new location. The location replaces an existing location.
  4. Click Apply. The location is immediately applied.

To remove a location, simply apply a blank location.

Changing Privilege Level

The default privilege level is Medium. A higher privilege level increases the risk score. For example, if two users have the same events, the user with a higher privilege level will have a higher risk score. To change the privilege level of a group of users:

  1. Click the check-boxes next to the users whose privilege level you want to change.
  2. Choose privilege level in the bulk actions drop-down.
  3. Choose the privilege level to apply.
  4. Click Apply. The privilege level is immediately applied.

Adding a Description

To add a description to a group of users:

  1. Click the check-boxes next to the users to which you want to add a description.
  2. Choose description in the bulk actions drop-down.
  3. Enter the description.
  4. Click Apply. The description is immediately applied.

To remove the description, simply apply a blank description.

User Details

Click on a user's name to see the User Details screen.

You can see the details Stellar Cyber has collected about the user, including what's been ingested from connected sources.

You can:

Adding as an Including Filter

To see only those events with this user:

  1. Click next to the Name field. The Actions list appears.
  2. Click . The filter is immediately applied and the events table is updated.

Adding as an Excluding Filter

To see only those events without this user:

  1. Click next to the Name field. The Actions list appears.
  2. Click . The filter is immediately applied and the events table is updated.

Copying to Clipboard

To copy the user's name to your clipboard:

  1. Click next to the Name field. The Actions list appears.
  2. Click Copy to Clipboard.

Seeing the User's Activities

To see the user's activities, scroll to the bottom of the page. The section at the bottom provides additional details on the user's activities, summarized in both tiles and a multi-tabbed table. The tiles display the number of events in the corresponding category. You can click the tabs or the tiles to see a table of the events.

  • Alerts

  • Related Assets

  • Commands

  • Authentications

  • Login Failures

  • Files

Real ID

The Real ID dashboard shows a table of users with all of their various identities. The identities are imported from Active Directory and correlated with a single SID. That SID is used to link all user identities.