Query: rule covering Detects the addition of a new rule to the Windows firewall via netsh
Matching passage: Sigma rule: Detects the addition of a new rule to the Windows firewall via netsh. Logsource: windows / process_creation. Rule: title: New Firewall Rule Added Via Netsh.EXE id: cd5cfd80-aa5f-44c0-9c20-108c4ae12e3c status: test description: Detects the addition of a new rule to the Windows firewall via netsh references: - https://web.archive.org/web/20190508165435/https://www.operationblockbuster.com/wp-content/uploads/2016/02/Operation-Blockbuster-RAT-and-Staging-Report.pdf author: Markus Neis, Sander Wiebing date: 2019-01-29 modified: 2023-02-10 tags: - attack.defense-impairment - attack.t1686.003 - attack.s0246 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \netsh.exe - OriginalFileName: netsh.exe selection_cli: CommandLine|contains|all: - ' firewall ' - ' add ' filter_optional_dropbox: CommandLine|contains: - advfirewall firewall add rule name=Dropbox dir=in action=allow "program=?:\Program Files (x86)\Dropbox\Client\Dropbox.exe" enable=yes profile=Any - advfirewall firewall add rule name=Dropbox dir=in action=allow "program=?:\Program Files\Dropbox\Client\Dropbox.exe" enable=yes profile=Any condition: all of selection_* and not 1 of filter_optional_* falsepositives: - Legitimate administration activity - Software installations level: medium
Near-miss passage: Sigma rule: Identifies when ClusterRoles/Roles are being modified or deleted.. Logsource: azure / activitylogs. Rule: title: Azure Kubernetes Sensitive Role Access id: 818fee0c-e0ec-4e45-824e-83e4817b0887 status: test description: Identifies when ClusterRoles/Roles are being modified or deleted. references: - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes - https://www.microsoft.com/security/blog/2021/03/23/secure-containerized-environments-with-updated-threat-matrix-for-kubernetes/ - https://www.microsoft.com/security/blog/2020/04/02/attack-matrix-kubernetes/ - https://medium.com/mitre-engenuity/att-ck-for-containers-now-available-4c2359654bf1 author: Austin Songer @austinsonger date: 2021-08-07 modified: 2022-08-23 tags: - attack.impact - attack.t1485 - attack.t1496 - attack.t1489 logsource: product: azure service: activitylogs detection: selection: operationName: - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLES/WRITE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLES/DELETE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLES/BIND/ACTION - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLES/ESCALATE/ACTION - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLES/WRITE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLES/DELETE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLES/BIND/ACTION - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLES/ESCALATE/ACTION condition: selection falsepositives: - ClusterRoles/Roles being modified and deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. - ClusterRoles/Roles modification from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. level: medium