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Linux Auditd Service Crash and Restart Burst

Splunk Security Content

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Summary
Detects rapid crash and restart bursts of Linux services by analyzing Linux Auditd events. The rule looks for crash events (ANOM_ABEND or specific syscall patterns) followed by repeated successful executions of the same executable within a 10-second window on the same host. It ingests Linux Auditd data (SYSCALL, TYPE, EXECVE, PROCTITLE) via the Splunk Add-on for Unix and Linux, normalizes fields (exe/host), and derives event_type as crash or start. Using streamstats, it tracks crash_count and restart_count per host/exe within 10-second windows. A burst is flagged when crash_count >= 2 and restart_count >= 2, indicating potential exploitation attempts, persistent compromise, or unstable application behavior. The analytic is tied to MITRE ATT&CK technique T1499.004 and is designed for endpoint telemetry correlation with network/application data. Correlation helps distinguish legitimate restarts from malicious activity. False positives may arise from application defects, resource pressure, or supervisor restart policies; thresholds should be tuned or exceptions added as needed. The rule is endpoint/Linux-specific and leverages CIM-aligned field normalization to facilitate integration with other data sources.
Categories
  • Endpoint
  • Linux
Data Sources
  • Windows Registry
  • Script
  • Image
  • Process
  • Logon Session
  • File
  • Drive
  • Snapshot
  • Command
  • Kernel
  • Driver
  • Volume
  • Network Traffic
  • Scheduled Job
  • Firmware
  • Active Directory
  • Service
  • Domain Name
  • WMI
  • Cloud Storage
  • Internet Scan
  • Web Credential
  • Certificate
  • Named Pipe
  • Certificate
  • Cloud Service
  • Process
  • Container
  • Pod
  • Sensor Health
  • Module
  • Network Share
  • Domain Name
  • Application Log
  • User Account
  • Kernel
  • Driver
  • Volume
  • Cloud Service
  • Process
  • Network Traffic
  • Scheduled Job
ATT&CK Techniques
  • T1499.004
Created: 2026-11-02