Security Solutions

crt.sh operates as a comprehensive certificate transparency log search engine that provides free access to SSL/TLS certificate data from multiple Certificate Transparency (CT) logs. The platform aggregates certificate information from various CT log sources, creating a centralized database for security research and monitoring purposes.The search engine enables users to query certificates by domain name, organization, certificate authority, or specific certificate attributes. Security professionals can track certificate issuance patterns, identify unauthorized certificates, and monitor subdomain discovery through comprehensive search capabilities. The platform displays detailed certificate information including validity periods, certificate authorities, and associated domain names.What distinguishes crt.sh is its completely free access model and extensive historical data coverage spanning multiple years of certificate transparency logs. The service provides both web-based search interfaces and API endpoints for automated queries. Advanced search operators allow filtering by certificate types, issuance dates, and specific certificate authorities.Security researchers, penetration testers, and IT security teams utilize crt.sh for various reconnaissance and monitoring activities. Common use cases include:<ul><li>Subdomain enumeration during security assessments</li><li>Monitoring for unauthorized certificate issuance</li><li>Certificate inventory management and compliance tracking</li><li>Brand protection and domain monitoring initiatives</li><li>Threat intelligence gathering and infrastructure mapping</li></ul>The platform supports bulk domain monitoring through its API, enabling organizations to integrate certificate transparency monitoring into their security workflows. Security teams can automate alerts for new certificate issuance affecting their domains or brands.crt.sh serves as an essential tool in the broader certificate transparency ecosystem, supporting industry efforts to improve SSL/TLS certificate security and transparency. The service complements other security monitoring tools by providing visibility into the public certificate infrastructure that underpins web security.

crt.sh is a free certificate transparency log search engine that enables security professionals to monitor and discover SSL/TLS certificates issued for specific domains.

crt.sh - Free certificate transparency log search engine for monitoring SSL/TLS certificate issuance and domain security analysis.

crt.sh

Comprehensive cybersecurity services, tools, and threat intelligence for modern enterprises

The NIST Cybersecurity Framework stands as one of the most widely adopted cybersecurity standards globally. Developed by the National Institute of Standards and Technology, this voluntary framework provides organizations with a structured approach to identifying, protecting against, detecting, responding to, and recovering from cybersecurity incidents.The framework organizes cybersecurity activities into five core functions that work together to create a comprehensive security posture. Identify helps organizations understand their systems, assets, and risks. Protect focuses on implementing safeguards to limit or contain potential cybersecurity events. Detect enables timely discovery of cybersecurity incidents.Respond provides guidance for taking action when cybersecurity incidents occur, including detailed incident response playbooks. Recover outlines activities for restoring capabilities and services impaired by cybersecurity incidents. Each function contains categories and subcategories that break down into specific, actionable security controls.What distinguishes the NIST Framework is its flexibility and risk-based approach. Organizations can tailor the framework to their specific industry, size, and risk tolerance. The framework references established standards and guidelines from organizations like ISO, COBIT, and SANS, creating a unified approach that builds on existing best practices.The framework serves organizations across all sectors, from small businesses to large enterprises and government agencies. Critical infrastructure sectors particularly benefit from its comprehensive guidance. Many organizations use it as a foundation for security program development, risk assessment, and compliance reporting.Implementation typically involves creating a current profile of existing cybersecurity practices, developing a target profile based on business requirements, and identifying gaps between current and desired states. The framework's three implementation tiers help organizations understand their risk management processes and external participation levels.The NIST Cybersecurity Framework has become a cornerstone of modern cybersecurity governance. Its influence extends beyond individual organizations, shaping industry standards and regulatory expectations. Regular updates ensure the framework remains relevant as threats and technologies evolve, making it an essential reference for cybersecurity professionals worldwide.

The NIST Cybersecurity Framework provides a comprehensive approach to managing cybersecurity risks through five core functions and implementation guidance.

NIST Cybersecurity Framework offers incident response playbooks and cybersecurity best practices for organizations to manage and reduce cyber risks.

Admin User

NIST Cybersecurity Framework

HUNTER Platform serves as a comprehensive threat hunting solution designed to enhance organizations' proactive security capabilities. The platform provides security teams with structured approaches to identify potential threats before they cause significant damage. It focuses on transforming reactive security operations into proactive hunting initiatives.The platform's core strength lies in its extensive library of pre-built queries and hypotheses that guide security analysts through systematic threat hunting processes. These ready-made components eliminate the need for teams to develop hunting strategies from scratch. The queries target common attack patterns, suspicious behaviors, and indicators of compromise across various threat vectors.HUNTER Platform integrates with existing security infrastructure to analyze data from multiple sources including endpoints, networks, and cloud environments. The solution supports various data formats and security tools commonly found in enterprise environments. This integration capability allows organizations to leverage their current security investments while enhancing hunting capabilities.The platform distinguishes itself through its hypothesis-driven approach to threat hunting. Rather than relying solely on automated detection, it empowers analysts to test specific theories about potential threats. This methodology helps security teams develop deeper understanding of their environment and potential attack vectors.Enterprise security teams, managed security service providers, and security operations centers utilize HUNTER Platform to strengthen their threat detection programs. Organizations with mature security operations often deploy the solution to enhance their existing capabilities. The platform proves particularly valuable for teams seeking to move beyond traditional signature-based detection methods.The solution addresses the growing need for proactive security measures in today's threat landscape. As attackers become more sophisticated and evasive, traditional reactive approaches often prove insufficient. HUNTER Platform enables organizations to stay ahead of threats through systematic hunting methodologies.Within the broader cybersecurity ecosystem, HUNTER Platform complements SIEM systems, threat intelligence platforms, and incident response tools. The platform enhances overall security posture by providing structured approaches to threat discovery and investigation. It serves as a bridge between automated detection systems and human analytical capabilities.

HUNTER Platform is a threat hunting solution that provides security teams with pre-built queries and hypotheses for proactive threat detection and investigation.

HUNTER Platform offers threat hunting tools with pre-built queries and hypotheses for proactive cybersecurity detection and investigation.

HUNTER Platform

Sigma HQ serves as the central hub for the Sigma project, an open-source initiative that has established a generic signature format for Security Information and Event Management (SIEM) systems. The platform addresses one of the most persistent challenges in cybersecurity: the lack of standardization in detection rules across different SIEM platforms and security tools.The Sigma format functions as a universal language for describing detection methods, allowing security teams to write rules once and deploy them across multiple platforms. This approach eliminates the need to rewrite detection logic for each specific SIEM system, significantly reducing development time and potential errors. The format supports complex detection scenarios while maintaining readability for human analysts.Sigma HQ maintains an extensive library of detection rules covering various attack techniques, malware families, and suspicious behaviors. These rules are continuously updated by a global community of security researchers and practitioners. The platform categorizes rules according to the MITRE ATT&CK framework, providing structured coverage of known adversary tactics and techniques.Organizations using Sigma benefit from vendor-agnostic detection capabilities that can be translated into native query languages for platforms including Splunk, Elastic, QRadar, ArcSight, and many others. This flexibility prevents vendor lock-in and enables security teams to maintain consistent detection coverage even when changing SIEM platforms. The format also supports automated rule conversion through various translation tools.Security operations centers, threat hunters, and incident response teams rely on Sigma rules for standardized detection across their environments. The format proves particularly valuable for organizations operating hybrid security stacks or those seeking to implement detection-as-code practices. Many commercial security vendors have adopted Sigma as a standard format for sharing threat intelligence and detection content.The Sigma project represents a significant step toward democratizing threat detection capabilities. By providing a common framework for expressing detection logic, Sigma HQ enables smaller organizations to benefit from enterprise-grade detection rules while allowing larger organizations to share knowledge more effectively across the cybersecurity community.

Sigma HQ provides a generic signature format for SIEM systems that enables cross-platform detection rules and standardized threat hunting across diverse security environments.

Sigma HQ offers generic signature format for SIEM systems, enabling cross-platform detection rules and standardized threat hunting across security tools.

Sigma HQ

The Yara-Rules Project stands as one of the most comprehensive community-driven repositories of YARA rules available to security professionals worldwide. This open-source initiative aggregates detection rules from security researchers, malware analysts, and threat hunters to create an extensive database for identifying malicious software and suspicious activities.The repository contains thousands of YARA rules organized into categories covering major malware families, exploit kits, webshells, and emerging threats. Rules are continuously updated by contributors who analyze new samples and develop signatures for detecting variants of known threats. The project maintains strict quality standards through peer review processes and testing protocols.What distinguishes this repository is its collaborative nature and comprehensive coverage of the threat landscape. Contributors include researchers from major security vendors, independent analysts, and academic institutions. The project provides rules for both common malware families and sophisticated advanced persistent threat campaigns, making it valuable for organizations of all sizes.Security teams integrate these rules into their YARA scanning infrastructure to enhance malware detection capabilities across endpoints, network traffic, and file repositories. Incident response teams rely on the rules for forensic analysis and threat classification during security investigations. Malware researchers use the repository as a reference for understanding attack patterns and developing new detection methodologies.The project serves multiple use cases within enterprise security operations:<ul><li>Endpoint protection - Integration with antivirus and EDR solutions for real-time scanning</li><li>Network security - Detection of malicious payloads in network traffic and email attachments</li><li>Threat hunting - Proactive searching for indicators of compromise across enterprise environments</li><li>Malware analysis - Classification and family attribution during reverse engineering processes</li></ul>The Yara-Rules Project represents a critical resource in the cybersecurity community's collective defense efforts. Its open-source model enables rapid response to emerging threats while providing organizations with production-ready detection capabilities. The repository continues to evolve as new contributors join and threat landscapes shift, maintaining its position as an essential tool for modern security operations.

Community-driven repository providing open-source YARA rules for malware detection, threat hunting, and security research across diverse threat landscapes.

Open-source YARA rules repository for malware detection & threat hunting. Community-driven security research platform with comprehensive rule sets.

Yara-Rules Project

Dragos operates as a specialized industrial cybersecurity company focused exclusively on protecting operational technology (OT) environments and critical infrastructure systems. The platform addresses the unique security challenges faced by industrial control systems, SCADA networks, and manufacturing operations that traditional IT security solutions often cannot adequately protect.The company's core offering centers around the Dragos Platform, which provides comprehensive visibility into industrial networks and assets. This platform combines asset discovery, network monitoring, and threat detection capabilities specifically designed for OT environments. The solution identifies unauthorized changes, suspicious communications, and potential security incidents within industrial systems.Threat intelligence services represent another key component of Dragos' offerings. The company maintains dedicated research teams that track industrial-focused threat actors and attack campaigns targeting critical infrastructure. This intelligence feeds directly into the platform's detection capabilities and helps organizations understand emerging threats to their specific industry sectors.Dragos distinguishes itself through its exclusive focus on industrial cybersecurity rather than attempting to adapt general IT security tools for OT use. The platform understands industrial protocols, recognizes normal operational patterns, and can differentiate between legitimate operational activities and potential security threats. This specialization extends to the company's incident response services, which include teams trained specifically in industrial system recovery and forensics.The platform serves electric utilities, oil and gas companies, water treatment facilities, manufacturing organizations, and other critical infrastructure operators. These organizations typically deploy Dragos to gain visibility into previously unmonitored OT networks, detect advanced persistent threats, and maintain compliance with industrial security regulations.In the broader cybersecurity landscape, Dragos fills a critical gap between traditional network security solutions and the specialized requirements of industrial environments. The platform integrates with existing security operations centers while providing the industrial-specific context and expertise that general cybersecurity tools typically lack. This positioning makes Dragos particularly valuable for organizations operating critical infrastructure that requires both robust security and uninterrupted operational availability.

Dragos is an industrial cybersecurity platform specializing in operational technology (OT) and critical infrastructure protection through threat detection, vulnerability management, and incident response services.

Dragos industrial cybersecurity platform protects critical infrastructure and OT environments with threat detection, vulnerability management, and response.

Certificate Transparency Logs

Filter Security Solutions

crt.sh