Detection rules › Sigma
Base64 MZ Header In CommandLine
Detects encoded base64 MZ header in the commandline
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
or:
CommandLine|contains: TVoAAAAAAAAAAAAA
CommandLine|contains: TVpQAAIAAAAEAA8A
CommandLine|contains: TVpTAQEAAAAEAAAA
CommandLine|contains: TVqAAAEAAAAEABAA
CommandLine|contains: TVqQAAMAAAAEAAAA
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 | match |
|