Query: Sigma rule for Detects certificate creation with template allowing risk permission subject and risky EKU
Matching passage: Sigma rule: Detects certificate creation with template allowing risk permission subject and risky EKU. Logsource: windows / security. Rule: title: ADCS Certificate Template Configuration Vulnerability with Risky EKU id: bfbd3291-de87-4b7c-88a2-d6a5deb28668 status: test description: Detects certificate creation with template allowing risk permission subject and risky EKU references: - https://www.specterops.io/assets/resources/Certified_Pre-Owned.pdf author: Orlinum , BlueDefenZer date: 2021-11-17 modified: 2022-12-25 tags: - attack.privilege-escalation - attack.credential-access logsource: product: windows service: security definition: Certificate services loaded a template would trigger event ID 4898 and certificate Services template was updated would trigger event ID 4899. A risk permission seems to be coming if template contain specific flag with risky EKU. detection: selection10: EventID: 4898 TemplateContent|contains: - 1.3.6.1.5.5.7.3.2 - 1.3.6.1.5.2.3.4 - 1.3.6.1.4.1.311.20.2.2 - 2.5.29.37.0 selection11: TemplateContent|contains: CT_FLAG_ENROLLEE_SUPPLIES_SUBJECT selection20: EventID: 4899 NewTemplateContent|contains: - 1.3.6.1.5.5.7.3.2 - 1.3.6.1.5.2.3.4 - 1.3.6.1.4.1.311.20.2.2 - 2.5.29.37.0 selection21: NewTemplateContent|contains: CT_FLAG_ENROLLEE_SUPPLIES_SUBJECT condition: (selection10 and selection11) or (selection20 and selection21) falsepositives: - Administrator activity - Proxy SSL certificate with subject modification - Smart card enrollement level: high
Near-miss passage: Sigma rule: Detects usage of bitsadmin downloading a file with a suspicious extension. Logsource: windows / process_creation. Rule: title: File With Suspicious Extension Downloaded Via Bitsadmin id: 5b80a791-ad9b-4b75-bcc1-ad4e1e89c200 status: test description: Detects usage of bitsadmin downloading a file with a suspicious extension references: - https://blog.netspi.com/15-ways-to-download-a-file/#bitsadmin - https://isc.sans.edu/diary/22264 - https://lolbas-project.github.io/lolbas/Binaries/Bitsadmin/ author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) date: 2022-06-28 modified: 2023-05-30 tags: - attack.persistence - attack.execution - attack.stealth - attack.t1197 - attack.s0190 - attack.t1036.003 - attack.command-and-control - attack.t1105 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \bitsadmin.exe - OriginalFileName: bitsadmin.exe selection_flags: CommandLine|contains: - ' /transfer ' - ' /create ' - ' /addfile ' selection_extension: CommandLine|contains: - .7z - .asax - .ashx - .asmx - .asp - .aspx - .bat - .cfm - .cgi - .chm - .cmd - .dll - .gif - .jpeg - .jpg - .jsp - .jspx - .log - .png - .ps1 - .psm1 - .rar - .scf - .sct - .txt - .vbe - .vbs - .war - .wsf - .wsh - .xll - .zip condition: all of selection_* falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_bitsadmin_download_susp_extensions/info.yml simulation: - type: atomic-red-team name: Windows - BITSAdmin BITS Download technique: T1105 atomic_guid: a1921cd3-9a2d-47d5-a891-f1d0f2a7a31b