Tools · Active Directory defense · 25 / 25
Protected Users membership is not a logon
Seeing an account in Protected Users is a group membership. It is not a logon event and not proof a logon was blocked. Write the group fact, and cite a logon event only when you have one.
Membership is configuration
A directory query that lists Protected Users returns accounts that are in that group at the time of the query. That is a configuration fact. It does not include a time of a logon, a workstation, or a failure code.
Removing the account from the group later does not rewrite this query. The note should say when you listed the group.
A logon is an event
A logon or a logon failure is an event on a domain controller or a workstation, with its own id and time. Membership does not create that event in your note. If you did not export one, write “no logon event attached.”
Do not say the account cannot sign in, or that a sign-in was stopped, based only on the group list. Those sentences need the event that shows the result.
What to write down
File the account, the group name, and the time you queried. File any logon separately, with its event id and time. Do not put the query time in the logon column.
Lab: a group list read as a blocked logon
A lab query at 11:00 UTC shows lab-ops in Protected Users. No security events were exported. A draft says lab-ops was blocked from signing in at 11:00 because of that membership.
The note says lab-ops was in the group at 11:00, which is the query time. No logon event is attached, so no block is claimed. 11:00 is not a logon time.
query time: 11:00 UTC account: lab-ops group: Protected Users logon events attached: none write: membership at query time not: a blocked logon at 11:00
Diagram
A group query and a logon event
Membership does not stand in for an event.
Shows. The account was in the group then
Time. When you ran the query
Does not. Show a logon result
Shows. A sign-in or a failure, if you exported one
Time. The event’s own time
Missing. Write that none was attached
Check yourself
1. lab-ops appears in Protected Users at query time. What has been shown?
2. No security event was exported. What do you write about sign-in?
3. The query time is 11:00. What is 11:00 if no event is attached?