Query: write Sigma for Detects creation of a file named "wpbbin" in the "%systemroot%\system32\" directory. Which could be indicative of UEFI b
Matching passage: Sigma rule: Detects creation of a file named "wpbbin" in the "%systemroot%\system32\" directory. Which could be indicative of UEFI b. Logsource: windows / file_event. Rule: title: UEFI Persistence Via Wpbbin - FileCreation id: e94b9ddc-eec5-4bb8-8a58-b9dc5f4e185f status: test description: Detects creation of a file named "wpbbin" in the "%systemroot%\system32\" directory. Which could be indicative of UEFI based persistence method references: - https://grzegorztworek.medium.com/using-uefi-to-inject-executable-files-into-bitlocker-protected-drives-8ff4ca59c94c - https://persistence-info.github.io/Data/wpbbin.html author: Nasreddine Bencherchali (Nextron Systems) date: 2022-07-18 tags: - attack.persistence - attack.stealth - attack.t1542.001 logsource: product: windows category: file_event detection: selection: TargetFilename: C:\Windows\System32\wpbbin.exe condition: selection falsepositives: - Legitimate usage of the file by hardware manufacturer such as lenovo (Thanks @0gtweet for the tip) 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