pySigma Red Canary LinuxEDR Pipeline

This is the Red Canary LinuxEDR pipeline for pySigma. It contains the processing pipeline sigma.pipelines.rclinuxedr for field renames and error handling. The following examples use the default Elasticsearch output but this pipeline can be paired with any backend depending on where the LinuxEDR telemetry is being stored (e.g. Elasticsearch, Splunk, OpenSearch, etc.).

This pipeline is currently maintained by:

• Cori Smith

Installation

This can be installed via pip from PyPI or using pySigma's plugin functionality

PyPI

pip install pysigma-pipeline-rclinuxedr

pySigma

from sigma.plugins import SigmaPluginDirectory
plugins = SigmaPluginDirectory.default_plugin_directory()
plugins.get_plugin_by_id("rclinuxedr").install()

Usage

sigma-cli

sigma convert -t elasticsearch -p rclinuxedr proc_creation_lnx_at_command.yml

pySigma

from sigma.backends.elasticsearch import LuceneBackend
from sigma.pipelines.rclinuxedr import RCLinuxEDR_pipeline
from sigma.rule import SigmaRule

rule = SigmaRule.from_yaml("""
title: Mimikatz CommandLine
status: test
logsource:
    category: process_creation
    product: linux
detection:
    sel:
        CommandLine|contains: mimikatz
    condition: sel""")


backend = LuceneBackend(RCLinuxEDR_pipeline())
print(backend.convert_rule(rule)[0])

Side Notes & Limitations

• Pipeline uses RC Linux EDR field names
• Pipeline only supports linux product type
• Pipeline supports the following category types for field mappings
  • process_creation
  • network_connection
  • firewall
• Pipeline supports the following fields:
  • CommandLine
  • CurrentDirectory
  • DestinationHostname
  • DestinationIp
  • DestinationgIsIPv6
  • DestinationPort
  • DstIP
  • DstPort
  • Initiated
  • IpAddress
  • ParentImage
  • ParentImagePath
  • ParentProcessId
  • ProcessId
  • Protocol
  • SrcIp
  • SrcPort
  • SourceHostname
  • SourceIp
  • SourceIsIPv6
  • SourcePort
  • User
  • dst_host
  • dst_ip
  • dst_port
  • md5
  • sha256
  • src_host
  • src_ip
  • src_port
• Any unsupported fields or categories will throw errors