Detection rules › Sigma
Invoke-Obfuscation STDIN+ Launcher - Security
Detects Obfuscated use of stdin to execute PowerShell
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 |
|---|---|---|
| Security-Auditing | 4697 | A service was installed in the system. |
Stages and Predicates
Stage 1: all of selection
ServiceFileName|contains: cmd
ServiceFileName|contains: powershell
Stage 2: all of selection2
or:
ServiceFileName|contains: '${input}'
ServiceFileName|contains: noexit
Stage 3: all of selection3
or:
ServiceFileName|contains: ' /c '
ServiceFileName|contains: ' /r '
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 |
|---|---|---|
ServiceFileName | match |
|
Neighbors
Broader alternatives (more inclusive than this rule)
These rules match a superset of what this rule catches. They cover the same events plus more. Use them if you want wider coverage and can absorb more false positives.
- CobaltStrike Service Installations - Security (drops 2 filters this rule applies)
- Invoke-Obfuscation Obfuscated IEX Invocation - Security (drops 2 filters this rule applies)
- Meterpreter or Cobalt Strike Getsystem Service Installation - Security (drops 2 filters this rule applies)
- Service Installed By Unusual Client - Security (drops 2 filters this rule applies)