Query: Sigma YAML for windows / process_creation
Matching passage: Sigma rule: Detects the deletion of all backups or system state backups via "wbadmin.exe". This technique is used by numerous ransom. Logsource: windows / process_creation. Rule: title: All Backups Deleted Via Wbadmin.EXE id: 639c9081-f482-47d3-a0bd-ddee3d4ecd76 related: - id: 89f75308-5b1b-4390-b2d8-d6b2340efaf8 type: derived status: test description: 'Detects the deletion of all 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 CommandLine|contains: keepVersions:0 condition: all of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects an office suit application (Word, Excel, PowerPoint, Outlook) communicating to target systems over uncommon port. Logsource: windows / network_connection. Rule: title: Office Application Initiated Network Connection Over Uncommon Ports id: 3b5ba899-9842-4bc2-acc2-12308498bf42 status: test description: Detects an office suit application (Word, Excel, PowerPoint, Outlook) communicating to target systems over uncommon ports. references: - https://blogs.blackberry.com/en/2023/07/romcom-targets-ukraine-nato-membership-talks-at-nato-summit author: X__Junior (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) date: 2023-07-12 modified: 2025-10-17 tags: - attack.command-and-control - attack.stealth logsource: category: network_connection product: windows detection: selection: Initiated: 'true' Image|endswith: - \excel.exe - \outlook.exe - \powerpnt.exe - \winword.exe - \wordview.exe filter_main_common_ports: DestinationPort: - 53 - 80 - 139 - 389 - 443 - 445 - 3268 filter_main_outlook_ports: Image|contains: :\Program Files\Microsoft Office\ Image|endswith: \OUTLOOK.EXE DestinationPort: - 143 - 465 - 587 - 993 - 995 condition: selection and not 1 of filter_main_* falsepositives: - Other ports can be used, apply additional filters accordingly level: medium