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# Pull Request
*Issue link(s)*:
* https://github.com/elastic/detection-rules/issues/5138
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## Summary - What I changed
Adds a missing detection for Azure storage account updates that enabled Blob Storage public access. **Please see the related issue for more details.**
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## How To Test
Query can be used in TRADE stack for example data.
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## Checklist
<!-- Delete any items that are not applicable to this PR. -->
- [ ] Added a label for the type of pr: `bug`, `enhancement`, `schema`, `maintenance`, `Rule: New`, `Rule: Deprecation`, `Rule: Tuning`, `Hunt: New`, or `Hunt: Tuning` so guidelines can be generated
- [ ] Added the `meta:rapid-merge` label if planning to merge within 24 hours
- [ ] Secret and sensitive material has been managed correctly
- [ ] Automated testing was updated or added to match the most common scenarios
- [ ] Documentation and comments were added for features that require explanation
## Contributor checklist
- Have you signed the [contributor license agreement](https://www.elastic.co/contributor-agreement)?
- Have you followed the [contributor guidelines](https://github.com/elastic/detection-rules/blob/main/CONTRIBUTING.md)?
(cherry picked from commit d6b6f99b27)
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# Pull Request
*Issue link(s)*:
* https://github.com/elastic/detection-rules/issues/5183
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## Summary - What I changed
Tunes the `Azure Entra ID Rare App ID for Principal Authentication` rule to ignore specific first-party client IDs that generate FPs regarding this rule.
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## How To Test
Query can be used in TRADE or telemetry stack.
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## Checklist
<!-- Delete any items that are not applicable to this PR. -->
- [ ] Added a label for the type of pr: `bug`, `enhancement`, `schema`, `maintenance`, `Rule: New`, `Rule: Deprecation`, `Rule: Tuning`, `Hunt: New`, or `Hunt: Tuning` so guidelines can be generated
- [ ] Added the `meta:rapid-merge` label if planning to merge within 24 hours
- [ ] Secret and sensitive material has been managed correctly
- [ ] Automated testing was updated or added to match the most common scenarios
- [ ] Documentation and comments were added for features that require explanation
## Contributor checklist
- Have you signed the [contributor license agreement](https://www.elastic.co/contributor-agreement)?
- Have you followed the [contributor guidelines](https://github.com/elastic/detection-rules/blob/main/CONTRIBUTING.md)?
(cherry picked from commit 87b6a80e01)
* [Tuning] Startup or Run Key Registry Modification
high percentage of the FPs are for programfiles and localappdata files in the registry data string value. This tuning should drop FPs/volume significantly.
* Update rules/windows/persistence_run_key_and_startup_broad.toml
---------
Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
(cherry picked from commit 29c4c19d59)
* [Rule Tuning] Update Azure / M365 Index Patterns and Lookback Windows
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# Pull Request
*Issue link(s)*:
* https://github.com/elastic/detection-rules/issues/5154
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## Summary - What I changed
Adjusts Azure / M365 rules regarding lookback windows, interval and index scopes. Please see related issue for more details.
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## How To Test
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## Checklist
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- [ ] Added a label for the type of pr: `bug`, `enhancement`, `schema`, `maintenance`, `Rule: New`, `Rule: Deprecation`, `Rule: Tuning`, `Hunt: New`, or `Hunt: Tuning` so guidelines can be generated
- [ ] Added the `meta:rapid-merge` label if planning to merge within 24 hours
- [ ] Secret and sensitive material has been managed correctly
- [ ] Automated testing was updated or added to match the most common scenarios
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## Contributor checklist
- Have you signed the [contributor license agreement](https://www.elastic.co/contributor-agreement)?
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* fixing timestamps
* Update rules/integrations/azure/initial_access_entra_illicit_consent_grant_via_registered_application.toml
Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>
* Update rules/integrations/azure/credential_access_azure_key_vault_excessive_retrieval.toml
Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
* update dates
* Update rules/integrations/o365/initial_access_microsoft_365_illicit_consent_grant_via_registered_application.toml
* Update rules/integrations/o365/initial_access_microsoft_365_illicit_consent_grant_via_registered_application.toml
---------
Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>
Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
(cherry picked from commit b474a81ead)
* [Rule Tuning] Update Azure / M365 Mappings
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# Pull Request
*Issue link(s)*:
* https://github.com/elastic/detection-rules/issues/5152
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## Summary - What I changed
Updates all mappings for Azure / M365 rules for accuracy and missing mappings.
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## How To Test
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## Checklist
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- [ ] Added a label for the type of pr: `bug`, `enhancement`, `schema`, `maintenance`, `Rule: New`, `Rule: Deprecation`, `Rule: Tuning`, `Hunt: New`, or `Hunt: Tuning` so guidelines can be generated
- [ ] Added the `meta:rapid-merge` label if planning to merge within 24 hours
- [ ] Secret and sensitive material has been managed correctly
- [ ] Automated testing was updated or added to match the most common scenarios
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## Contributor checklist
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- Have you followed the [contributor guidelines](https://github.com/elastic/detection-rules/blob/main/CONTRIBUTING.md)?
* reverting changes to unit test
* changed webhook rule back to persistence
* Update rules/integrations/azure/persistence_azure_automation_webhook_created.toml
* updated date
* updating date
---------
Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
(cherry picked from commit b451ff8e4c)
* updating Azure AD Global Administrator Role Assigned
* removed logic changes as it only effects outside of PIM. Adding a different rule for these
* slight change to query
* tuning severity
* Update rules/integrations/azure/persistence_azure_global_administrator_role_assigned.toml
Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>
* Update rules/integrations/azure/persistence_azure_global_administrator_role_assigned.toml
* Update rules/integrations/azure/persistence_azure_global_administrator_role_assigned.toml
---------
Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>
(cherry picked from commit dcb4334e6f)
* [Rule Tuning] Potential Port Scanning Activity from Compromised Host
* Update rules/linux/discovery_port_scanning_activity_from_compromised_host.toml
* Update port scanning detection query
Refine query to include source IP and limit destination port range.
* Update discovery_port_scanning_activity_from_compromised_host.toml
* Update query in discovery port scanning rule
* Update discovery_port_scanning_activity_from_compromised_host.toml
(cherry picked from commit 8319b7f5d8)
* Add Required to the Annotation
* Additional required fields
* remove nonempty sting validation
* Required Types via Annotated and Dataclass
* remove space
* Remove inline comment
* Switch to getting a list
* Fix typo and sort
---------
Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>
(cherry picked from commit 42be8bc8ba)
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# Pull Request
*Issue link(s)*:
* https://github.com/elastic/detection-rules/issues/5140
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## Summary - What I changed
Adds missing detection coverage for retrieving Azure Storage Account keys by a user with highly-privileged roles. Please see the related issue for more details.
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## How To Test
Query can be used in TRADE stack for telemetry visbility.
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## Checklist
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- [ ] Added a label for the type of pr: `bug`, `enhancement`, `schema`, `maintenance`, `Rule: New`, `Rule: Deprecation`, `Rule: Tuning`, `Hunt: New`, or `Hunt: Tuning` so guidelines can be generated
- [ ] Added the `meta:rapid-merge` label if planning to merge within 24 hours
- [ ] Secret and sensitive material has been managed correctly
- [ ] Automated testing was updated or added to match the most common scenarios
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## Contributor checklist
- Have you signed the [contributor license agreement](https://www.elastic.co/contributor-agreement)?
- Have you followed the [contributor guidelines](https://github.com/elastic/detection-rules/blob/main/CONTRIBUTING.md)?
(cherry picked from commit 0c739da6b9)
* updating Azure AD Global Administrator Role Assigned
* removed logic changes as it only effects outside of PIM. Adding a different rule for these
* slight change to query
* tuning rule Microsoft Entra ID Elevated Access to User Access Administrator
* revert changes
* Added operation name to query logic
(cherry picked from commit bb08af542a)
* [Rule Tuning] Windows High Severity - 2
* [Rule Tuning] Windows High Severity - 3
* Revert "[Rule Tuning] Windows High Severity - 3"
This reverts commit 32c8348072.
(cherry picked from commit 567b82cb2f)
* [Tuning] AWS Access Token Used from Multiple Addresses
Tuning was triggered by a community member
- fixes wildcard and `Pulumi` typos to exclude common IaC tools
- adds exclusion for ``source.as.organization.name` == "AMAZON-02" and aws.cloudtrail.event_category == "Data"` to exclude the noisy multi-IP traffic coming from Amazon-02 networks performing high-throughput data-plane operations. I didn't exclude this network completely because this network can also indicate user-triggered events that are worth keeping in the alert.
- added additional high noise service providers that may be more indicative of console browsing
- added a field for pairing source.ip & network
- added highlighted fields
* Update rules/integrations/aws/initial_access_iam_session_token_used_from_multiple_addresses.toml
* Update rules/integrations/aws/initial_access_iam_session_token_used_from_multiple_addresses.toml
(cherry picked from commit 90ee151bf0)
AWS SNS is a pub/sub style service where users can subscribe to a topic and receive messages published to that topic. Below is a screenshot of the different protocols a user could subscribe with and the various endpoints that could be associated with those protocols.
AWS SNS Email Subscription by Rare User --> AWS SNS Rare Protocol Subscription by User (not a new rule)
- changed the scope of the rule to capture the first time a user/role subscribes to a topic via a particular protocol (ie. email, http, lambda, mobile). Subscribing to an SNS topic via email is a rather normal behavior and it would be normal for each user to subscribe this way "for the first time" making this rule not as valuable as it was intended to be.
- reduced execution window
- added real-world threat references
- added additional MITRE technique and Impact tag
- small edits to IG and Description
- edited highlighted fields
AWS SNS Topic Message Publish by Rare User
- added AWS to name for consistency
-changed new terms fields to use a combination of cloud.account.id and user.name against the topic itself `aws.cloudtrail.resources.arn`. So that instead of simply evaluating the first time a user/role publishes a message to ANY topic, this rule now looks for the first time a user/role publishes a message to a particular topic. We want to make this distinction to capture the case where an identity responsible for publishing to a particular topic A suddenly starts publishing to another topic B, which indicates behavior that should be verified.
- reduced new terms window
- added setup notes as Data events are necessary for capturing the `Publish` API call
- reduced execution window
- added real-world threat references
- added additional MITRE technique and Impact tag
- small edits to IG and Description
- edited highlighted fields
AWS SNS Topic Created by Rare User
- removed the `AssumedRole` and `*-i*` parameters from the query as this narrowed the query to only alert on behavior from EC2 instance roles. We ideally want to evaluate this behavior for all users and roles.
- reduced execution window
- added real-world threat references
- added additional MITRE technique and Impact tag
- small edits to IG and Description
- edited highlighted fields
(cherry picked from commit 88d9811361)
* [Rule Tuning] AWS S3 Unauthenticated Bucket Access by Rare Source
No query changes as this rule is alerting as expected, however I did change the new terms field to be a combination of an IP address and a particular bucket name. Rather than just alerting for the IP address itself. Perhaps an IP is seen retrieving a doc from a public bucket in the environment (expected behavior) but then it also accesses a file in a bucket meant to be private (unexpected behavior). With new terms only on the IP address we would miss the private bucket access.
- added `tls.client.server_name` to new terms field (bucket name)
- reduced execution window
- removed duplicate IG
- added setup note for turning on data events
- small edits to description and highlighted fields
* Update collection_s3_unauthenticated_bucket_access_by_rare_source.toml
* Update collection_s3_unauthenticated_bucket_access_by_rare_source.toml
* Update collection_s3_unauthenticated_bucket_access_by_rare_source.toml
* Update collection_s3_unauthenticated_bucket_access_by_rare_source.toml
(cherry picked from commit fcc82fa49c)
* [Rule Tunings] AWS DynamoDB new terms Rules
### AWS DynamoDB Scan by Unusual User
- changed new terms field to use cloud.account.id and user.name combination to account for roles and users
- reduced execution window
- reduced history window
- small edits to description, IG and highlighted fields
### AWS DynamoDB Table Exported to S3
- removed inaccurate setup notes
- reduced history window
- small edits to description and highlighted fields
* Apply suggestions from code review
(cherry picked from commit 6f725b1ed0)
This rule is performing as expected and low noise in telemetry so no changes to query
- added investigation fields
- small edits to description and IG
- added a reference from Unit42 showing real world threat case
- reduced execution window
(cherry picked from commit 1f044117b7)
* [Rule Tuning] SSM Session Started to EC2 Instance
Role/role session noise seen in telemetry due to new fields term using `aws.cloudtrail.user_identity.arn`, which is unique for each role session and does not isolate the role itself.
- new fields term change to `cloud.account.id` and `user.name` combination to account for both IAMUsers and Roles across multiple accounts.
- added AWS to the rule name
- reduced execution window
- small edits to description and IG
- added reference from IG to Reference section
* adding highlighted fields
* added EC2 tag
* Update lateral_movement_aws_ssm_start_session_to_ec2_instance.toml
* Apply suggestions from code review
(cherry picked from commit 7ff2648cfd)
Terrance DeJesus