detecting-network-anomalies-with-zeek

Warn

Audited by Gen Agent Trust Hub on Apr 13, 2026

Risk Level: MEDIUMCOMMAND_EXECUTIONEXTERNAL_DOWNLOADSPROMPT_INJECTION
Full Analysis
  • [PRIVILEGE_ESCALATION]: The deployment workflow requires elevated permissions for multiple system-level operations.
  • Evidence: Extensive use of sudo in SKILL.md for tasks including package installation, source compilation (make install), network interface tuning (ethtool), and service management.
  • [PERSISTENCE_MECHANISMS]: The skill establishes automated long-term operation through system scheduling and background services.
  • Evidence: Instructions in SKILL.md create a daily cron job at /etc/cron.d/zeek-logrotate and enable the filebeat systemd service for log management.
  • [EXTERNAL_DOWNLOADS]: Fetches software components from an external repository during the installation process.
  • Evidence: Downloads the Zeek source code from its official GitHub repository (https://github.com/zeek/zeek).
  • [COMMAND_EXECUTION]: The included analysis script executes system commands to interact with the network monitoring environment.
  • Evidence: scripts/agent.py utilizes subprocess.run() to invoke the zeek and zeekctl binaries for status checks and PCAP processing.
  • [INDIRECT_PROMPT_INJECTION]: The skill processes untrusted data from network logs, creating a surface for potential injection attacks if the output is processed by an LLM.
  • Ingestion points: scripts/agent.py reads and parses conn.log, dns.log, and ssl.log, which are populated with raw network metadata such as SNI, DNS queries, and User-Agents.
  • Boundary markers: No delimiters or explicit instructions are provided to the agent to treat log data as untrusted content.
  • Capability inventory: The agent has the ability to execute system commands via subprocess.run() and read files from the filesystem.
  • Sanitization: Network identifiers and queries are parsed into summaries without evidence of validation or sanitization against malicious strings.
Audit Metadata
Risk Level
MEDIUM
Analyzed
Apr 13, 2026, 04:57 AM