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Event ID: 627 Source: Security

Source
Description
Change Password Attempt:
Target Account Name: <user name>
Target Domain: <domain name>
Target Account ID: %{<SID>}
Caller User Name: <name>$
Caller Domain: <domain>
Caller Logon ID: (0x0,0x3E7)
Privileges: -
Comments
 
As per Microsoft: "If a single account has several password-change failures logged, it might be under a password-guessing attack". See MSW2KDB for additional information about this event.
You can have a 627 Failure on a DC if a user logs on for the first time, needs to reset his password, and fails to meet the password settings. The user gets a message like this: "The password cannot be changed at this time". See ME273004 for further details on this issue.
Audit message for a Change Password Attempt operation.

If the user is TsInternetUser then see ME244057 (the system changes the password used by the TsInternetUser account for security purposes). Also check ME174074 for more details.

We have also seen this message being generated for every account when we ran the Microsoft Baseline Security Analyzer on a web server. Look for event id 1 from MBSA to confirm if MBSA was used to analyzer the security.

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