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Windows Event ID 4726 - A user account was deleted
Introduction
Event 4726 generates every time a user object is deleted.
Figure 1. Event ID 4726 — General tab under Event Properties.
Subject:
Security ID: The SID of the account that requested to delete theTarget Account.
Account Name: The name of the account that requested to delete the Target Account.
Account Domain: The Subject's domain or computer name. Formats may vary to include the NETBIOS
name, the lowercase full domain name, or the uppercase full domain name.
For well-known security principals, this field is "NT AUTHORITY," and for local user accounts this
field will contain the computer name that this account belongs to.
Logon ID: The logon ID helps you correlate this event with recent events that might contain the same logon ID (e.g. event ID 4624).
Target Account:
Security ID: The SID of the account that was deleted.
Account Name: The name of the account that was deleted.
Account Domain: The Target Account's domain or computer name. Formats could vary to include the
NETBIOS name, the lowercase full domain name, or the uppercase full domain name.
For well-known security principals, this field is "NT AUTHORITY," and for local user accounts, this
field will contain the computer name that this account belongs to.
Additional information.
Privileges: The list of user privileges which were used during the operation.
Monitoring event ID 4726.
- Accounts that have Target Account/Security ID corresponding to high-value accounts, including administrators, built-in local administrators, domain administrators, and service accounts.
- Accounts that have to be monitored for every change. This list can vary between enterprises and industries.
- Local accounts, because these accounts are often not deleted, and this could serve as an indicator of malicious activity.
- Accounts that should never be deleted (for example, service accounts).
The need for an auditing solution.
Auditing solutions like ADAudit Plus offer real-time monitoring, user and entity behavior analytics, and reports; together these features help secure your AD environment.
Around the clock, real-time monitoring.
Although you can attach a task to the security log and ask Windows to send you an email, you're limited to simply getting an email whenever event 4726 is generated. Windows also lacks the ability to apply more granular filters that are required to meet security recommendations.
For example, Windows can send you an email every time event 4726 is generated, but it can't tell the difference between regular and high-value accounts. Recieving alerts specifically for high-value accounts reduces the chance of missing out on critical notifications hidden among the heap of false-positive alerts.
With a tool like ADAudit Plus, not only can you apply granular filters to focus on real threats, you can receive real-time notifications via SMS, too.
User and entity behavior analytics (UEBA).
Leverage advanced statistical analysis and machine learning techniques to detect anomalous behavior within your network.
Compliance-ready reports.
Meet various compliance standards, such as SOX, HIPAA, PCI, FISMA, GLBA, and the GDPR with out-of-the-box compliance reports.