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Event 4738 is generated every time a user object is changed.
At times, this event may not show any changes—that is, all Changed Attributes appear as “-.“ This usually happens when a change is made to an attribute that is not listed in the event. In this case, there's no way to determine which attribute was changed. For example, if the discretionary access control list (DACL) is changed, event 4738 is generated, but all attributes will be “-.“
Figure 1. Event ID 4738 — General tab under Event Properties.
Figure 2. Event ID 4738 — Details tab under Event Properties.
Security ID: The SID of the account that made an attempt to change the Target Account.
Account Name: The name of the account that made an attempt to change the Target Account.
Account Domain: The Subject'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.
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).
Security ID: The SID of the account that was modified.
Account Name: The name of the account that was modified.
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.
SAM Account Name: The pre-Windows 2000 logon name.
Display Name: This is usually the combination of the user's first name, middle initial, and last name.
User Principal Name: The internet-style login name for the account, based on the Internet standard RFC 822. By convention, this should map to the account's email name.
Home Directory: The user's home directory. If homeDrive attribute is set and specifies a drive letter, homeDirectory should be a Universal Naming Convention (UNC) path, and the path must be a network UNC of the form \\Server\Share\Directory.
Home Drive: This attribute specifies the drive letter to which to map the UNC path specified by the account's homeDirectory attribute.
Script Path: This attribute specifies the path of the account’s logon script.
Profile Path: This attribute specifies a path to the account's profile.
User Workstations: This attribute contains the list of NetBIOS or DNS names of the computers from which the user can log on. Each computer name is separated by a comma.
Password Last Set: This attribute specifies the last time the account’s password was modified.
Account Expires: The date when the account expires.
Primary Group ID: The Relative Identifier (RID) of a user object's primary group.
AllowedToDelegateTo: The list of Service Principal Names (SPNs) to which this account can present delegated credentials.
Old UAC Value: This specifies the flags that control password, lockout, disable/enable, script, and other behaviors for the user account. It contains the previous value of the user object's userAccountControl attribute.
New UAC Value: If the value of userAccountControl attribute of user object was changed, you will see the new value here.
User Account Control: The list of changes to the userAccountControl attribute.
User Parameters: If you change any setting using Active Directory Users and Computers management console in the Dial-in tab of a user account's properties, then you will see
SID History: This contains the previous SIDs used for the object if the object was moved from another domain.
Note: Whenever an object is moved from one domain to another, a new SID is created and becomes the objectSID.
Logon Hours: The hours that the account is allowed to log on to the domain.
Privileges: The list of user privileges which were used during the operation.
Auditing solutions like ADAudit Plus offer real-time monitoring, user and entity behavior analytics, and reports; together these features help secure your AD environment.
Although you can attach a task to the security log and ask Windows to send you an email, you will only get an email whenever that particular event ID is generated. Windows also lacks the ability to apply more granular filters that are required to meet security recommendations.
With a tool like ADAudit Plus, not only can you apply granular filters to focus on real threats, you can receive alerts in real time via SMS, too.
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