1type: trigger
2name: sigmahq/proc_creation_win_powershell_public_folder
3description: |
4  This rule detects execution of PowerShell scripts located in the "C:\Users\Public" folder
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\powershell.exe' || evt.Parsed.Image endsWith '\\pwsh.exe') && (evt.Parsed.CommandLine contains '-f C:\\Users\\Public' || evt.Parsed.CommandLine contains '-f "C:\\Users\\Public' || evt.Parsed.CommandLine contains '-f %Public%' || evt.Parsed.CommandLine contains '-fi C:\\Users\\Public' || evt.Parsed.CommandLine contains '-fi "C:\\Users\\Public' || evt.Parsed.CommandLine contains '-fi %Public%' || evt.Parsed.CommandLine contains '-fil C:\\Users\\Public' || evt.Parsed.CommandLine contains '-fil "C:\\Users\\Public' || evt.Parsed.CommandLine contains '-fil %Public%' || evt.Parsed.CommandLine contains '-file C:\\Users\\Public' || evt.Parsed.CommandLine contains '-file "C:\\Users\\Public' || evt.Parsed.CommandLine contains '-file %Public%'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1059.001
15
16  label: "Execution of Powershell Script in Public Folder"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24