1type: trigger
2name: sigmahq/proc_creation_win_powershell_token_obfuscation
3description: |
4  Detects TOKEN OBFUSCATION technique from Invoke-Obfuscation
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.CommandLine matches '\\w+`(\\w+|-|.)`[\\w+|\\s]' || evt.Parsed.CommandLine matches '"(\\{\\d\\})+"\\s*-f' || evt.Parsed.CommandLine matches '(?i)\\$\\{`?e`?n`?v`?:`?p`?a`?t`?h`?\\}') && not (evt.Parsed.CommandLine contains '${env:path}'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1027.009
15
16  label: "Powershell Token Obfuscation - Process Creation"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24