Query: Sigma YAML for windows / network_connection
Matching passage: Sigma rule: Detects outbound network connection initiated by Microsoft Dialer. The Microsoft Dialer, also known as Phone Dialer, is. Logsource: windows / network_connection. Rule: title: Outbound Network Connection Initiated By Microsoft Dialer id: 37e4024a-6c80-4d8f-b95d-2e7e94f3a8d1 status: test description: 'Detects outbound network connection initiated by Microsoft Dialer. The Microsoft Dialer, also known as Phone Dialer, is a built-in utility application included in various versions of the Microsoft Windows operating system. Its primary function is to provide users with a graphical interface for managing phone calls via a modem or a phone line connected to the computer. This is an outdated process in the current conext of it''s usage and is a common target for info stealers for process injection, and is used to make C2 connections, common example is "Rhadamanthys" ' references: - https://tria.ge/240301-rk34sagf5x/behavioral2 - https://app.any.run/tasks/6720b85b-9c53-4a12-b1dc-73052a78477d - https://research.checkpoint.com/2023/rhadamanthys-v0-5-0-a-deep-dive-into-the-stealers-components/ - https://strontic.github.io/xcyclopedia/library/dialer.exe-0B69655F912619756C704A0BF716B61F.html author: CertainlyP date: 2024-04-26 tags: - attack.execution - attack.command-and-control - attack.t1071.001 logsource: category: network_connection product: windows detection: selection: Image|endswith: :\Windows\System32\dialer.exe Initiated: 'true' filter_main_local_ranges: DestinationIp|cidr: - 127.0.0.0/8 - 10.0.0.0/8 - 172.16.0.0/12 - 192.168.0.0/16 - 169.254.0.0/16 - ::1/128 - fe80::/10 - fc00::/7 condition: selection and not 1 of filter_main_* falsepositives: - In Modern Windows systems, unable to see legitimate usage of this process, However, if an organization has legitimate purpose for this there can be false positives. level: high
Near-miss passage: Sigma rule: Detects scenarios where system auditing for important events such as "Process Creation" or "Logon" events is disabled.. Logsource: windows / security. Rule: title: Important Windows Event Auditing Disabled id: ab4561b1-6c7e-48a7-ad08-087cfb9ce8f1 related: - id: 69aeb277-f15f-4d2d-b32a-55e883609563 type: derived status: test description: Detects scenarios where system auditing for important events such as "Process Creation" or "Logon" events is disabled. references: - https://docs.google.com/presentation/d/1dkrldTTlN3La-OjWtkWJBb4hVk6vfsSMBFBERs6R8zA/edit - https://github.com/SigmaHQ/sigma/blob/ad1bfd3d28aa0ccc9656240f845022518ef65a2e/documentation/logsource-guides/windows/service/security.md author: Nasreddine Bencherchali (Nextron Systems) date: 2023-06-20 modified: 2023-11-17 tags: - attack.defense-impairment - attack.t1685.001 logsource: product: windows service: security definition: dfd8c0f4-e6ad-4e07-b91b-f2fca0ddef64 detection: selection_state_success_and_failure: EventID: 4719 SubcategoryGuid: - '{0CCE9210-69AE-11D9-BED3-505054503030}' - '{0CCE9211-69AE-11D9-BED3-505054503030}' - '{0CCE9212-69AE-11D9-BED3-505054503030}' - '{0CCE9215-69AE-11D9-BED3-505054503030}' - '{0CCE921B-69AE-11D9-BED3-505054503030}' - '{0CCE922B-69AE-11D9-BED3-505054503030}' - '{0CCE922F-69AE-11D9-BED3-505054503030}' - '{0CCE9230-69AE-11D9-BED3-505054503030}' - '{0CCE9235-69AE-11D9-BED3-505054503030}' - '{0CCE9236-69AE-11D9-BED3-505054503030}' - '{0CCE9237-69AE-11D9-BED3-505054503030}' - '{0CCE923F-69AE-11D9-BED3-505054503030}' - '{0CCE9240-69AE-11D9-BED3-505054503030}' - '{0CCE9242-69AE-11D9-BED3-505054503030}' AuditPolicyChanges|contains: - '%%8448' - '%%8450' selection_state_success_only: EventID: 4719 SubcategoryGuid: '{0CCE9217-69AE-11D9-BED3-505054503030}' AuditPolicyChanges|contains: '%%8448' condition: 1 of selection_* falsepositives: - Unlikely level: high