Security Labs
Elastic Security Labs empowers security teams across the globe with novel security intelligence research and free to use tools.
Not another Log4Shell: inside the Log4j 2 deserialization allowlist bypass
We reproduced this java deserialization vulnerability against official Log4j 2.26.1 JARs. Getting to command execution took two more things that Log4j itself does not ship. Here is how the bypass works, which versions carry it, and what to hunt for.
Blog
Hand-picked stories from our editors — threat detection, audit logging, and security operations insights.
Agents vs. agents: how we triage HackerOne reports for $2 each, 85% as well as a human
LLMs made it cheap to flood bug bounty programs with submissions. Here's how Elastic built an AI triage agent that matches human decisions 85% of the time, including the architecture, threat model and calibration against 3,300 real reports
What's new in Elastic Defend: 800+ vulnerable driver rules, automated troubleshooting, and ARM support
Elastic Defend automatically generates and instantly deploys vulnerable driver YARA rules from VirusTotal, LOLDrivers and Microsoft's blocklist, closing the gap BYOVD attacks depend on. Plus a new troubleshooting skill and ARM endpoint protection.
Inside Elastic InfoSec's agentic SOC: How we cut AI agent LLM calls by 60%
We run fourteen AI agents that triage Elastic InfoSec alerts. They were taking 19 LLM calls to do work that needed 8. Here's the five-step optimization loop we run across the fleet, plus the prompt template you can use with any AI assistant.
Inside Elastic InfoSec's agentic SOC: When to inline your agent's skills for a 5× cost reduction
We tested two agentic SOC architectures in parallel across 36,822 real Agent Builder conversations. One won by 5.7x: a specialized workflow triaging alerts for $0.69 each, against $3.42 for a single agent juggling 14 Skills. The data and the decision framework are both below.
How Elasticsearch ES|QL COMPLETION turns noisy curl and wget rules into high-fidelity cloud security alerts
Elastic InfoSec tested this detection rule pattern on their own cloud fleet, filtering noisy curl and wget events with deterministic logic and LLM triage so only genuine threats reach an analyst.
