Files
sigma-rules/rules
Samirbous 42e7f3b4ce [New] Multiple Alerts on a Host Exhibiting CPU Spike (#5621)
* [New] Multiple Alerts on a Host Exhibiting CPU Spike

This rule correlates multiple security alerts from a host exhibiting unusually high CPU utilization within a short time window. This behavior may indicate malicious activity such as malware execution, cryptomining, exploit payload execution, or abuse of system resources following initial compromise.

* Update multiple_alerts_on_host_with_cpu_spike.toml

* Rename multiple_alerts_on_host_with_cpu_spike.toml to impact_alerts_on_host_with_cpu_spike.toml

* Update impact_alerts_on_host_with_cpu_spike.toml

* Update rules/cross-platform/impact_alerts_on_host_with_cpu_spike.toml

Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>

* Update non-ecs-schema.json

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Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>
2026-01-26 20:42:20 +00:00
..

rules/

Rules within this folder are organized by solution or platform. The structure is flattened out, because nested file hierarchies are hard to navigate and find what you're looking for. Each directory contains several .toml files, and the primary ATT&CK tactic is included in the file name when it's relevant (i.e. windows/execution_via_compiled_html_file.toml)

folder description
. Root directory where rules are stored
apm/ Rules that use Application Performance Monitoring (APM) data sources
cross-platform/ Rules that apply to multiple platforms, such as Windows and Linux
integrations/ Rules organized by Fleet integration
linux/ Rules for Linux or other Unix based operating systems
macos/ Rules for macOS
ml/ Rules that use machine learning jobs (ML)
network/ Rules that use network data sources
promotions/ Rules that promote external alerts into detection engine alerts
windows/ Rules for the Microsoft Windows Operating System

Integration specific rules are stored in the integrations/ directory:

folder integration
aws/ Amazon Web Services (AWS)
azure/ Microsoft Azure
cyberarkpas/ Cyber Ark Privileged Access Security
endpoint/ Elastic Endpoint Security
gcp/ Google Cloud Platform (GCP)
google_workspace/ Google Workspace (formerly GSuite)
o365/ Microsoft Office
okta/ Oka