Query: detection rule: Detects activity as "net user administrator /domain" and "net group domain admins /domain"
Matching passage: Sigma rule: Detects activity as "net user administrator /domain" and "net group domain admins /domain". Logsource: windows / security. Rule: title: Reconnaissance Activity id: 968eef52-9cff-4454-8992-1e74b9cbad6c status: test description: Detects activity as "net user administrator /domain" and "net group domain admins /domain" references: - https://findingbad.blogspot.de/2017/01/hunting-what-does-it-look-like.html author: Florian Roth (Nextron Systems), Jack Croock (method), Jonhnathan Ribeiro (improvements), oscd.community date: 2017-03-07 modified: 2022-08-22 tags: - attack.discovery - attack.t1087.002 - attack.t1069.002 - attack.s0039 logsource: product: windows service: security definition: The volume of Event ID 4661 is high on Domain Controllers and therefore "Audit SAM" and "Audit Kernel Object" advanced audit policy settings are not configured in the recommendations for server systems detection: selection: EventID: 4661 AccessMask: '0x2d' ObjectType: - SAM_USER - SAM_GROUP ObjectName|startswith: S-1-5-21- ObjectName|endswith: - '-500' - '-512' condition: selection falsepositives: - Administrator activity level: high
Near-miss passage: Sigma rule: Detects the deletion of backups or system state backups via "wbadmin.exe". This technique is used by numerous ransomware. Logsource: windows / process_creation. Rule: title: Windows Backup Deleted Via Wbadmin.EXE id: 89f75308-5b1b-4390-b2d8-d6b2340efaf8 related: - id: 639c9081-f482-47d3-a0bd-ddee3d4ecd76 type: derived status: test description: 'Detects the deletion of backups or system state backups via "wbadmin.exe". This technique is used by numerous ransomware families and actors. This may only be successful on server platforms that have Windows Backup enabled. ' references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1490/T1490.md#atomic-test-5---windows---delete-volume-shadow-copies-via-wmi-with-powershell - https://github.com/albertzsigovits/malware-notes/blob/558898932c1579ff589290092a2c8febefc3a4c9/Ransomware/Lockbit.md - https://www.sentinelone.com/labs/ranzy-ransomware-better-encryption-among-new-features-of-thunderx-derivative/ - https://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/ransomware-report-avaddon-and-new-techniques-emerge-industrial-sector-targeted - https://www.trendmicro.com/content/dam/trendmicro/global/en/research/24/b/lockbit-attempts-to-stay-afloat-with-a-new-version/technical-appendix-lockbit-ng-dev-analysis.pdf - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/wbadmin-delete-systemstatebackup author: frack113, Nasreddine Bencherchali (Nextron Systems) date: 2021-12-13 modified: 2024-05-10 tags: - attack.impact - attack.t1490 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \wbadmin.exe - OriginalFileName: WBADMIN.EXE selection_cli: CommandLine|contains|all: - 'delete ' - backup filter_main_keep_versions: CommandLine|contains: keepVersions:0 condition: all of selection_* and not 1 of filter_main_* falsepositives: - Legitimate backup activity from administration scripts and software. level: medium