Everything You Need to Know About the Deprecation of Legacy Search
Censys Legacy Search is deprecating Sept 2026. Learn about migrating to Censys Platform—featuring MFA, AI assistant, audit logs & a streamlined experience.
Topic
Censys Search
45 posts
Cert Happens. Protecting Your Brand from Phishy Lookalikes with Censys Collections
Discover how Certificate Transparency (CT) log monitoring protects your domains from malicious certs, phishing & shadow IT. Learn how Censys makes CT monitoring easy.
Accelerating Security Response with CensAI™
"Discover the Censys Query Assistant: search the internet using natural language in any language. Simplify threat hunting & attack surface management—no syntax needed."
CARISMATICA Cybersecurity Hackathon: Using Censys to Identify Vulnerable Medical Services
Discover how Censys Search helped identify vulnerable PACS servers at the CARISMATICA healthcare cybersecurity hackathon. Learn OSINT techniques for medical cybersecurity.
How Censys Search Helps Prevent Phishing Attacks by Monitoring SSL/TLS Certificates
# SEO-Optimized Meta Description **Discover how attackers exploit SSL/TLS certificates in phishing attacks and why certificate management is critical to phishing prevention. Learn key defense strategies with Censys Search.** *Characters: 158* --- **Why this works:** - **Under 160 characters** ✅ - **Primary keywords included:** "phishing attacks," "SSL/TLS certificates," "certificate management," "Censys Search" - **Action-oriented opener** ("Discover") encourages clicks - **Addresses a pain point** (exploitation of certificates) to attract security professionals - **Includes the brand tag** (Censys Search) for branded search relevance - **Implies actionable value** ("Learn key defense strategies") to boost click-through rate
Analysis of Fox Kitten Infrastructure Reveals Unique Host Patterns and Potentially New IOCs
**Discover how Censys analyzed Fox Kitten IOCs from the FBI/CISA advisory, uncovering hidden infrastructure patterns and active threats. Expert research on Iran-based cyber actors.**
From Ransomware to Regulation: Lessons from the Worst Year of Healthcare Cyber Breaches
Discover why 2024 was healthcare's worst year for cyberattacks. Learn key challenges in attack surface management and how Censys Search helps protect patient data.
Is Your Next Breach Coming From a Minecraft Server?
Discover how rogue Minecraft servers on corporate infrastructure pose serious security risks. Learn how Censys Attack Surface Management and Censys Search detect hidden threats.
Let's Look for Bad Stuff Using Censys' "Suspicious-Open-Directory" Label!
**Discover how Censys' new "suspicious-open-dir" label revolutionizes threat hunting by filtering 393K open directories down to ~1%, making malicious content detection faster and easier.**
Highlights from the New Unleash the Power of Censys Search Handbook
Discover how Censys Search empowers cybersecurity teams with real-time internet intelligence. Download our free guide to track adversary infrastructure and craft powerful queries.
Simplify Threat Investigations: Identify Suspicious Open Directories with Censys Search
Discover suspicious open directories faster with Censys Search's new "suspicious-open-dir" label. Hunt threat actor infrastructure, malware, and C2 servers efficiently.
Top Targets: The Impact of Ransomware on Manufacturing
Manufacturing leads ransomware attacks in H1 2024 with 281 victims. Learn key findings from GRF's report and how to protect your attack surface from threats.
Stumbling Upon XehookStealer C2 Instances
Discover how Censys Search uncovered XehookStealer's link to Agniane Stealer through C2 fingerprinting, favicon pivoting, and adversary infrastructure analysis.
A Beginner's Guide to Hunting Malicious Open Directories
**Discover how to find and investigate malicious open directories using Censys Search. Learn hunting techniques to identify threat actor infrastructure and track opendirs.**
Connect with Experts and Join the Discussion in the New Censys Community
Join the new Censys Community! Connect with fellow users, discover powerful Search & ASM queries, access discussion forums, and share Attack Surface Management best practices. Sign up free today!
Back to the Future: How Historical Data Can Enhance Your Cyber Defenses
Discover why historical internet intelligence is essential for threat hunting. Learn how Censys helps security teams track adversary infrastructure, build timelines, and anticipate future cyberattacks.
Boost Your Threat Hunting Skills with These 5 Informative Webinars
Watch 5 on-demand threat hunting webinars featuring Censys Search experts. Learn to track adversary infrastructure, uncover emerging threats, and level up your threat intelligence skills.
7 Resources to Inform Your Next Hunt for Malicious Infrastructure
Discover 7 expert resources for hunting malicious infrastructure using Censys Search. Learn to track C2 networks, phishing sites, and adversary infrastructure with threat intelligence tips.
Fortifying the Chain: Gaining Visibility into Third-Party Risk
Discover how Attack Surface Management helps identify third-party vulnerabilities before attackers do. Learn key strategies to secure your supply chain with Censys Search.
New Research Demonstrates Censys' Unmatched Internet Intelligence
**Discover how Censys benchmarks its internet scanning engine against competitors using honeypots. Learn why real-time, accurate internet intelligence matters for security teams.**
A Beginner's Guide to Tracking Malware Infrastructure
Learn how to build queries for malware infrastructure hunting. Discover approachable methods to identify threat actor patterns, find IOCs, and track adversary infrastructure using Censys Search.
User Stories: Investigating Cyber Threats with Censys Search
Discover how cybersecurity practitioners use Censys Search to track adversary infrastructure, investigate malware attacks, and fight phishing campaigns. Real user stories inside.
The Top 5 Benefits of More Queries and Results
Unleash the power of Censys Search with more queries & results pages. Learn how upgraded Solo & Teams packages unlock deeper internet intelligence insights.
Cut Through the Noise with Custom Field Selection
**Discover how Censys Search custom field selection lets you tailor API results, save time, and get hyper-targeted host data. Unleash smarter threat hunting today!**
24 Questions to Ask About Your Data in 2024
# SEO-Optimized Meta Description **Option 1 (Best):** Discover 24 critical questions to evaluate your internet intelligence and threat data. Improve adversary infrastructure detection with better internet scan data from Censys Search. **Character count:** 158 **Option 2:** Is your threat intelligence data holding you back? Explore 24 questions to assess your internet intelligence and strengthen your cybersecurity strategy in 2024. **Character count:** 155 --- ## Why This Works: - **Keywords included:** "internet intelligence," "threat intelligence," "adversary infrastructure," "Censys Search," "internet scan data" - **Compelling hook:** The numbered list ("24 questions") creates curiosity and implies actionable, structured content - **Action-oriented language:** "Discover," "Improve," "Evaluate" encourage clicks - **Value proposition clear:** Readers
Two Key Ways to Collaborate in Censys Search
Discover how to collaborate in Censys Search using tags and comments. Learn to organize, categorize, and share findings with your team to save time and boost efficiency.
Working Smarter, Not Harder, with Matched Services
Discover how Censys Search Matched Services helps you quickly identify relevant host services, save time in threat hunting, and streamline your investigations. Unlock faster results!
User Resources: How to Get Started in Censys Search
Make the most of Censys Search with helpful resources from our Getting Started library! On the Censys Search home page, you can now access a library of curated resources focused on how to leverage Censys Search. Whether you’re brand new to Censys Search or are a more seasoned user, our Getting Started resources are […]
Tracking Vidar Infrastructure with Censys
Stealers are trojans that collect credentials, notable files, and tokens from an infected computer and upload the data back to attacker-controlled infrastructure. Today, we will discuss one of the more advanced stealers: Vidar. Vidar is a piece of malware originating from the Arkei Stealer but uses new methods to find and direct traffic to […]
Unleash the Power of Censys Search: Exploring More with Historical Data
Welcome back to Part III of our “Unleash the Power of Censys Search” series! In this series, we take a closer look at different ways Censys Search users can make the most of their engagement with the tool. In Part I, we provided tips for how to get started running queries in Censys Search. In […]
Unleash the Power of Censys Search: A Look at Censys Search in Action
In Part I of our “Unleash the Power of Censys Search” blog series, you read that enterprises, governments, and researchers can access our industry-leading internet intelligence by using the Censys Search tool. (If you haven’t had a chance to check out the blog, give it a read! Within you’ll find tips for how to […]
Unleash the Power of Censys Search: A Quick Guide to Queries
April 2026 Update: Censys has come a long way: an entire platform complete with pivoting, dashboards, rapid response queries by Censys ARC, investigation tools, and MCP support. Access sample queries within the free platform, and happy hunting! Whether you’re brand new to Censys Search and are looking for tips to get started, or are […]
Mission Critical Intelligence: Why This Government Agency Partners with Censys to Understand the Threat Landscape
When ZMap, the world’s first global, open-source internet scanner, was released in 2012, it immediately attracted tens of thousands of users from leading government agencies who conducted critical searches to understand the emerging digital threat landscape. Today, Censys’ proprietary Internet Map is the most comprehensive, up-to-date collection of global internet infrastructure enriched with critical context […]
Revolutionize Network Reconnaissance with AI-Powered CensysGPT: Simplify Queries & Enhance Security
At Censys we pride ourselves on being innovators and encourage creativity, experimentation and collaboration amongst our team. During our 2023 Hackathon, we challenged our engineering team to develop ideas for new solutions that would improve our customer experience and make our product more accessible. Our integrations team rose to the challenge with an exciting […]
5 Ways to Win Buy-In for Better Internet Intelligence
Internet intelligence is at the heart of any successful cybersecurity strategy. Whether you’re proactively searching for suspicious activity or reacting to a CVE that just dropped, you can’t do your job well without if you don’t have a full view into today’s evolving threat landscape. However, sometimes security teams and stakeholders within the organization aren’t […]
Unlocking the Potential of X.509 Certificate Data
We are celebrating the launch of Certs 2.0 – the largest X.509 certificate repository in existence! ???? Our new Certs 2.0 index provides enhanced access to our extensive billion certificate repository, with more efficient and granular searching capabilities. Additional benefits include: With all these new goodies available, we wanted to take a moment and review why […]
Censys in the News: ESXiArgs Ransomware Coverage
The Censys research team has been closely monitoring the spread of ESXiArgs ransomware since it was first detected in early February. The team has used Censys internet scanning data to track infected hosts across countries, to monitor how the hacker group has since responded, and to develop a dashboard with Censys data that researchers […]
Follow-up on Russian “Host F”
(As reported in “Russian Ransomware C2 Network Discovered in Censys Data”) Executive summary In late January 2023 Censys analysts reviewed Host F (95.213.145.99), which was previously identified in Censys reporting as a Russia-based, probably malicious host running a Command and Control (C2) ransomware kit with callbacks to an associated Bitcoin wallet. Upon return to the […]
Fresh Search Query "Recipes" (+ Actual Food Recipes) to Start Your 2023
Running an internet search query can be a lot like cooking a meal. Hang with us here … If you think about it, both cooking and querying rely on stepwise orders of operation – both follow “recipes,” if you will. For example, if you’re looking to uncover hacked web hosts, you’ll follow a series of […]
Why Did a Cybersecurity Company Choose Censys Data Over Competitors?
We know that fresh, accurate, and timely data is the key ingredient to any cybersecurity intel effort. Security teams can have all the tools and manpower in the world, but without access to the right data (the kind of data that also reduces false positives and minimizes noise) security efforts will ultimately fall short. […]
Pulse Connect Secure: A View from the Internet
Pulse Connect Secure is a low-cost and widely-deployed SSL VPN solution for remote and mobile users. Over the years, researchers have found several significant vulnerabilities in the server software, some even resulting in the active exploitation of critical infrastructure by malicious threat actors. In April of 2021, CISA released a report detailing some of […]
Here's How Citizen Lab Used Censys to Expose a Spyware Vendor
The Challenge: Spyware from Candiru was used to impersonate sites from well-known advocacy organizations to target activists and human rights workers. Citizen Lab, a research institute at the University of Toronto, used Censys data to understand impersonated sites, passing the details forward to Microsoft Threat Intelligence Center (MSTIC) to find exploits. What Citizen Lab achieved […]
Who's Down with IPP? Finding Internet-Connected Printers with Censys
In the Internet of Things (IoT) arena, printers might seem like the least of our problems. We’ve got new smart home devices connecting to the Internet every day—refrigerators, home security systems, washing machines (spoiler alert, your clothes are now clean and, no, you probably don’t need an app to know that). Arguably more worrisome are […]
GreyNoise Research Finds Censys Scan Data Is Fastest, Most Comprehensive
Cybersecurity firm GreyNoise Intelligence recently published “A Week In the Life of a GreyNoise Censor: A Benign View.” I’m incredibly excited about this blog because anytime an organization outside of yours conducts research that reinforces statements you make on a daily basis, it’s a wonderful thing. There’s even still some additional nuance to be explored, […]
Finding Hacked Web Servers with Censys Search
According to the 2022 Verizon Data Breach Investigations Report, web servers are the top asset most commonly impacted in breaches. This is not surprising – after all, web servers often make up the bulk of an organization’s Internet-facing infrastructure, and therefore are more likely to be exposed than other types of digital assets. Finding hacked […]