This is an original planning guide. It is not a vendor manual, an official standard, or legal advice. Example addresses use documentation ranges. Review every command before you paste it.
What this hour is for
Attack Surface Reduction Rules Explained drafts a Defender rule. Audit is a note about what you would watch. It is not a production off switch. Do not disable a rule. This page does not explain how to perform the activity the rule watches.
Write the system you administer, the name of this change, and the time. A second change waits until this line has been read back.
The browser tool drafts text or reads a paste you already hold. It does not log in, it does not scan a network you do not administer, and it does not apply.
192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced.
The change you can finish
Apply nothing while you are writing the note. When the lab window opens, it is one change on the system named in the ticket. Read the draft, then the system, then decide.
Rollback is the file, the record, or the snapshot you saved first. You do not invent a rollback after the only copy is gone.
- Write the device group you administer.
- Read one rule.
- Leave it enabled in the note.
- Do not change the tenant.
- Stop.
Mistakes that outlive the statement
Attack Surface Reduction Rules Explained goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.
- A rule disabled to make a test pass.
- The page used as steps to perform the activity.
- A tenant you do not administer.
Decisions to write down
One decision for Attack Surface Reduction Rules Explained: The group is yours. The rule stays on. Nothing is changed. The page is not an attack guide. And one rule is enough.
Checks before you call it done
Confirm this before you call the change done: The group is written. Nothing was changed. The rule is still on in the note. No attack steps are in the note. And a second person can say the rule. If one of those fails, stop.
# ASR note. Do not disable a rule.
# This page does not explain how to perform the activity.
Before you leave the system
Attack Surface Reduction Rules Explained ends when the system in the note is the system in the ticket. If it is not, stop.
The draft stays a draft until a person has read the names in it. A generator does not log in, does not scan, and does not send mail.
192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. They belong in the note. They are not values you publish because a draft included them.
prompt-for-this is a reminder that a secret is missing. It is not a password, a key, or a token you save. A sample password is replaced. It is not a password you keep.
One change is the window. If two things move and the result is wrong, you will not know which one did it.
If the same step fails twice, stop for the day. Restore the copy you took first.
A second person reads the scope aloud. If they cannot find it in the ticket, the note is not done.
This page is a planning guide. It is not legal advice, not an audit opinion, not a vendor manual, and not the text of a standard. You do not disable a security control to make a check pass. You do not use the page against a system you do not administer.
Tools for this guide
These tools run in the browser on this site. They do not log into your machines.
Related pillar guides
More in this cluster
The pillar for this page, and the next published pages filed with it.