skills/mukul975/anthropic-cybersecurity-skills/detecting-network-anomalies-with-zeek/Gen Agent Trust Hub
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
sudoinSKILL.mdfor 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.mdcreate a daily cron job at/etc/cron.d/zeek-logrotateand enable thefilebeatsystemd 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.pyutilizessubprocess.run()to invoke thezeekandzeekctlbinaries 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.pyreads and parsesconn.log,dns.log, andssl.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