Query: rule covering Detects usage of findstr with the "EVERYONE" or "BUILTIN" keywords. This was seen being used in combination with "icacls
Matching passage: Sigma rule: Detects usage of findstr with the "EVERYONE" or "BUILTIN" keywords. This was seen being used in combination with "icacls. Logsource: windows / process_creation. Rule: title: Permission Misconfiguration Reconnaissance Via Findstr.EXE id: 47e4bab7-c626-47dc-967b-255608c9a920 status: test description: 'Detects usage of findstr with the "EVERYONE" or "BUILTIN" keywords. This was seen being used in combination with "icacls" and other utilities to spot misconfigured files or folders permissions. ' references: - https://www.absolomb.com/2018-01-26-Windows-Privilege-Escalation-Guide/ author: Nasreddine Bencherchali (Nextron Systems) date: 2022-08-12 modified: 2023-11-11 tags: - attack.credential-access - attack.t1552.006 logsource: category: process_creation product: windows detection: selection_findstr_img: - Image|endswith: - \find.exe - \findstr.exe - OriginalFileName: - FIND.EXE - FINDSTR.EXE selection_findstr_cli: CommandLine|contains: - '"Everyone"' - '''Everyone''' - '"BUILTIN\\"' - '''BUILTIN\''' selection_special: CommandLine|contains|all: - 'icacls ' - 'findstr ' - Everyone condition: all of selection_findstr_* or selection_special falsepositives: - Unknown level: medium regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_findstr_recon_everyone/info.yml
Near-miss passage: Sigma rule: Detects scheduled task creation using "schtasks" that contain potentially suspicious or uncommon commands. Logsource: windows / process_creation. Rule: title: Suspicious Command Patterns In Scheduled Task Creation id: f2c64357-b1d2-41b7-849f-34d2682c0fad status: test description: Detects scheduled task creation using "schtasks" that contain potentially suspicious or uncommon commands references: - https://app.any.run/tasks/512c1352-6380-4436-b27d-bb62f0c020d6/ - https://twitter.com/RedDrip7/status/1506480588827467785 - https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/devil-bait/NCSC-MAR-Devil-Bait.pdf author: Florian Roth (Nextron Systems) date: 2022-02-23 modified: 2024-03-19 tags: - attack.privilege-escalation - attack.persistence - attack.execution - attack.t1053.005 logsource: product: windows category: process_creation detection: selection_schtasks: Image|endswith: \schtasks.exe CommandLine|contains: '/Create ' selection_pattern_1: CommandLine|contains: - '/sc minute ' - '/ru system ' selection_pattern_2: CommandLine|contains: - cmd /c - cmd /k - cmd /r - 'cmd.exe /c ' - 'cmd.exe /k ' - 'cmd.exe /r ' selection_uncommon: CommandLine|contains: - ' -decode ' - ' -enc ' - ' -w hidden ' - ' bypass ' - ' IEX' - .DownloadData - .DownloadFile - .DownloadString - '/c start /min ' - FromBase64String - mshta http - mshta.exe http selection_anomaly_1: CommandLine|contains: - :\ProgramData\ - :\Temp\ - :\Tmp\ - :\Users\Public\ - :\Windows\Temp\ - \AppData\ - '%AppData%' - '%Temp%' - '%tmp%' selection_anomaly_2: CommandLine|contains: - cscript - curl - wscript condition: selection_schtasks and ( all of selection_pattern_* or selection_uncommon or all of selection_anomaly_* ) falsepositives: - Software installers that run from temporary folders and also install scheduled tasks are expected to generate some false positives level: high