Detection rules › Sigma
Invoke-Obfuscation Via Stdin
Detects Obfuscated Powershell via Stdin in Scripts
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1059.001 Command and Scripting Interpreter: PowerShell |
| Defense Evasion | T1027 Obfuscated Files or Information |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
| Security-Auditing | 4688 | A new process has been created. |
Stages and Predicates
Stage 1: selection
CommandLine|re: '(?i)(set).*&&\s?set.*(environment|invoke|\$\{?input).*&&.*"'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
CommandLine | regex_match |
|