Skip to content

[Rule Tuning] O365 Exchange Suspicious Mailbox Right Delegation #4589

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Apr 2, 2025
Merged

[Rule Tuning] O365 Exchange Suspicious Mailbox Right Delegation #4589

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions rules/integrations/o365/persistence_exchange_suspicious_mailbox_right_delegation.toml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
creation_date = "2021/05/17"
integration = ["o365"]
maturity = "production"
updated_date = "2025/01/15"
updated_date = "2025/04/01"

[rule]
author = ["Elastic", "Austin Songer"]
Expand Down Expand Up @@ -64,7 +64,7 @@ type = "query"
query = '''
event.dataset:o365.audit and event.provider:Exchange and event.action:Add-MailboxPermission and
o365.audit.Parameters.AccessRights:(FullAccess or SendAs or SendOnBehalf) and event.outcome:success and
not user.id : "NT AUTHORITY\SYSTEM (Microsoft.Exchange.Servicehost)"
not user.id : "NT AUTHORITY\SYSTEM (Microsoft.Exchange.ServiceHost)"
'''


Expand Down
Loading