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DETECTION OVERVIEW
Risk Factors
Enumeration is a simple but important step taken by attackers after an initial network compromise. Attack tools and legitimate Windows utilities make enumeration relatively easy to perform. Enumeration activity typically does not negatively affect network performance, but attackers can leverage this information to find new targets in an attack campaign.
The system might change the risk score for this detection.
Kill Chain
Risk Score
37
After infiltrating a network, an attacker typically looks for privileged users as their next target. To find these users, an attacker might query directory services to enumerate users, domains, and groups on the network. Active Directory (AD) is the main directory service in Windows environments, and every Windows device also has a built-in account database called the Security Account Manager (SAM), which stores local account information. One method for enumerating groups is to send a Microsoft remote procedure call (MS-RPC) request that includes a SAM Remote Protocol (SAMR) interface and an operation, both of which are associated with net group commands. For example, a net group command that retrieves information about Domain Admins can help an attacker perform additional severe steps in an attack campaign.
Monitor and investigate unusual activity quickly to minimize potential damage
Upgrade Windows to Windows 10 version 1607 or later, which restricts SAM access to only local administrators
Prevent unauthorized users from accessing MS-SAMR by placing restrictions on which clients are allowed to remotely query MS-SAMR
Limit the number of users with local administrator privileges in your environment
