Cheatography
https://cheatography.com
A quick reference for writing useful queries to leverage Censys Internet Map data. Try them out at https://search.censys.io/. Check out our data changelog at https://search.censys.io/search/changelog?resources=hosts.
IP Addresses and Subnets
Single IP (supports IPv4 and IPv6) |
8.8.8.8 or
ip:8.8.8.8 |
Subnet by CIDR |
ip: "23.0.0.0/8" |
Subnet by IP Range |
ip: [1.12.0.0 to 1.15.255.255] |
Hostname |
dns.names:"*.zip" |
Autonomous System # (ASN) |
autonomous_system.asn:16509 |
Autonomous System Name |
autonomous_system.name:"AMAZON-02"
|
IPv6 hosts |
ip: "2001::/3" or
labels:ipv6 |
Ports, Protocols, and Software
Port |
services.port:22
services.port:{20,21,22} |
Service / Protocol |
services.service_name:SSH |
Transport protocol |
services.transport_protocol:TCP |
Software by product and/or vendor |
services: (software.vendor:"Apache" AND software.product:"HTTPD") |
Software by URI / CPE |
services.software.cpe =`cpe:2.3:o:mikrotik:routeros::::::::` |
Banner grab |
services.banner:"HTTP/" |
Device type |
services.software: (other.key:"Device" and other.value:"Router") |
Number of open ports on host |
service_count: [1 to 20] |
Geography
Country |
location.country:"United States" |
City |
location.city:"Ann Arbor" |
State |
location.province:"Michigan" |
GPS Coordinates |
(location.coordinates.latitude=41.85003 AND location.coordinates.longitude=-87.65005) |
Pro tip: Use Map To Censys to draw a box over the geographic area of interest and click “Open in Search” to see hosts in the area
Labels
Labels provide broad context about a host or service. Some useful host labels: ics, login-page, open-dir, network.device, cryptocurrency, managed-file-transfer, ipv6, tarpit, honeypot.
Handy Censys Search CLI JQ filters
List of IP addresses |
'.[].ip' |
Banners |
'.[] | .ip as $ip | .services[] | [ $ip, .transport_protocol, .port, .service_name, .banner ]' |
Usage: censys search <query> | jq <filter>
|
|
Web Entities (HTTP/S)
HTML Title |
services.http.response.html_title:"dashboard" |
Response Body |
services.http.response.body:"login" |
Status code |
services.http.response.status_code=200 |
Server header |
services.http.response.headers: (key: Server
and value.headers: nginx
) |
Certificate Issuer |
services.tls.certificates.leaf_data.issuer.organization:"Let's Encrypt" |
Certificate Subject Common Name |
services.tls.certificates.leaf_data.subject.common_name: *.herokuapp.com
|
TLS version
(Highest negotiated version) |
services.tls.version_selected:"TLSv1_1" |
Favicon MD5 Hash |
services.http.response.favicons.md5_hash:* |
Favicon Shodan Hash (mmh3) |
services.http.response.favicons.shodan_hash:* |
Use Case Examples
Hacked web servers |
services: (service_name:"HTTP" and http.response.html_title:”hacked by”) |
Hosts serving login pages with port 22 open |
services.port:22 and labels: login-page
|
Servers in Russia running remote access protocols |
location.country:"Russia" and labels: remote-access
|
Filter out hosts with 100+ ports open |
services.truncated: false |
Compromised MikroTik routers |
services.service_name: MIKROTIK_BW and "HACKED" |
Filter out honeypots and noisy hosts |
not labels:{'honeypot', 'tarpit', 'truncated'} |
RDP running on nonstandard ports |
services: (service_name="RDP" and NOT port=3389) |
Pro tip: Get more results by including virtual hosts -- click the gear icon and toggle Virtual Hosts: INCLUDE
Certificates
Unexpired certificates for a specific domain |
labels= unexpired
and names: censys.io |
Self-signed certificates observed in Censys host scans |
ever_seen_in_scan: true and labels: "self-signed" |
Trusted certs from a specific CA expiring on specific day |
parsed.issuer.organization: "Let's Encrypt" and labels: "trusted" and parsed.validity_period.not_after: 2023-10-13 |
|
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