Today we are reviewing shodan also know as the hacker’s search engine. We will see what shodan is and how to use shodan. We will also explore some advanced features of shodan. Everything related to shodan search filters and shodan search queries is also available.

Welcome to another hacking tutorial.

What is Shodan?
How does Shodan work?
- Shodan can show researchers and pentesters:
How to use shodan?
List of Shodan Filters

What is Shodan?

Shodan is a unique search engine that finds devices that are connected to the internet and gathers information about those related devices using banners and port scanners.

The most popular searches are for devices like routers, webcam, ADB devices, etc. Shodan can show all the devices which are broadcasting their information on the world wide web. This is especially useful for people pentesting IoT devices as well as critical infrastructures such as power grids and power plants.

Sometimes due to misconfiguration and human error, criticals services are explored on the internet. With Shodan, you can see those critical services openly accessible via the internet.

How does Shodan work?

As I said before Shodan is a search engine that works by scanning the entire internet and parsing the information on banners that are returned by various devices connected on the internet. By using this information, Shodan can show you a lot of valuable information about the devices on the internet.

For, e.g., it can show detailed information about which ports and services are being used by a specific device. It can also provide information about which webserver and version it is using along with other juicy details that can be used by hackers and pen-testers for information gathering.

Shodan is mainly used for security research, and that was the original intent of the developer. However, many hackers also use this tool to find information about vulnerable devices on the internet.

The main focus is around the Internet of Things since there are already billions of devices coming online every year.

Shodan can show researchers and pentesters:

1) Devices which have specific vulnerabilities that

2)Devices which can be identified quickly by their banner information.

3)Devices with default credentials

4)Devices connected to the internet without any security

How to use shodan?

A simple Tutorial for Basic Users:

Step 1: You start by visiting the official site of Shodan.

Step 2: Now in the search box type: Any of the following popular queries

“Webcam“,” ” vnc“, ” Android debug bride“, ” router“, ” cams” default password“

For this search, I looked for “android debug bridge.“

From the image, you can see all the critical information revealed by Shodan

Step 3: Click on any link, and you will get even more detailed information about ports services manufacturers information, etc.

Hacking With Shodan (How to use Shodan Guide)

What if you want to search for any specific information on shodan?

Well, we have shodan filters that can help you simplify the whole deal. There are many more filters that can be used. The detailed list is added below. For now, I will show the most popular ones below:

Shodan Filters

Here are the most popular search filters you can use on shodan:

§ city: find devices connected in a particular city,

e.g., city:”San Francisco.”

§ country: find devices in a particular country,

e.g., country:”IN”

§ geo: you can pass it longitude-latitude coordinates

geo:32.8,-117,50

§ Hostname: find devices with that matching the Hostname

hostname:”google”

§ net: search based on an IP address

net:”216.219.143.0/24″

§ os: search based on the operating systems

os:”windows”

§ port: find particular ports which are open on specific devices (e.g., 8080, 21, etc.)

port:8080

§ before/after: find results within a specific time frame.

country: CH after: 22/03/2010 before:4/6/2010

You can also use the “Explore” feature on the main website of Shodan to look at popular searches and results. You’ll find exciting things like:

1. Webcams

2. SCADA

3. Traffic lights

4. Routers

5. Default passwords

6. IoT devices

7.and many more

Advanced Use of shodan

Here are a few other cool features of shodan you need to know about

1. Data Export feature: You can export your shodan search results in various formats by using the top menu

2. Browser Search: You can configure your browser by adding addons for shodan. A chrome and firefox plugin is available with shodan API

3. Shodan is Free: You need to create a free shodan account to access all the information. Compared to before, many of the shodan features have become paid only. However, you can still use the free version as much as you want legally.

4. Premium Accounts: A shodan premium account can be bought with a monthly subscription, as shown below. See the image for more details on shodan premium plans

5. Shodan Exploit search feature

You can search exploits with the new shodan exploit search engine. See image below where I searched for android exploits. I’ll make a separate article on this feature so stay tuned.

Android exploits:

6. Shodan Map search

You can find devices by using the map search feature. A great way to find vulnerable devices near you. You can control everything with the mouse making it quite easy to navigate.

7. Shodan honeypot checker

Shodan now has a great feature to check for honeypots. By using these feature, we can confirm the IP address we are pining is an actual device or a honeypot.

If you want to know more about honeypots, click here.

List of Shodan Filters

General Filters

Name	Description	Type
after	Only show results after the given date (dd/mm/yyyy)	string
asn	Autonomous system number	string
before	Only show results before the given date (dd/mm/yyyy)	string
category	Available categories: ics, malware	string
city	Name of the city	string
country	The 2-letter country code	string
geo	Accepts between 2 and 4 parameters. If 2 parameters: latitude, longitude. If 3 parameters: latitude,longitude,range. If 4 parameters: top left latitude, top left longitude, bottom right latitude, bottom right longitude.	string
hash	Hash of the data property integer	integer
has_ipv6	True/ False boolean	boolean
has_screenshot	True/ False boolean	boolean
hostname	The full hostname for the device	string
ip	Alias for net filter	string
isp	ISP managing the netblock	string
net	Network range in CIDR notation (ex. 199.4.1.0/24)	string
org	The organization assigned the netblock	string
os	Search by Operating system	string
port	Port number for the service integer	string
postal	Postal code (US-only) string	string
product	Name of the software/ product providing the banner string	string
region	Name of the region/ state string	string
state	Alias for region string	string
version	Version for the product string	string
vuln	CVE ID for a vulnerability string	string

HTTP Filters

Name	Description	Type
http.component	Name of web technology used on the website	string
http.component_category	Category of web components used on the website	string
http.html	HTML of web banners	string
http.html_hash	Hash of the website HTML	integer
http.status	Response status code	integer
http.title	Title for the web banners website	string

NTP Filters

Name	Description	Type
ntp.ip	IP addresses returned by monlist	string
ntp.ip_count	Number of IPs returned by initial monlist	integer
ntp.more	True/ False; whether there are more IP addresses to be gathered from monlist	boolean
ntp.port	Port used by IP addresses in monlist	integer

SSL Filters

Name	Description	Type
has_ssl	True / False	boolean
ssl	Search all SSL data	string
ssl.alpn	Application layer protocols such as HTTP/2 (“h2”)	string
ssl.chain_count	Number of certificates in the chain	integer
ssl.version	Possible values: SSLv2, SSLv3, TLSv1,TLSv1.1, TLSv1.2	string
ssl.cert.alg	Certificate algorithm	string
ssl.cert.expired	True / False	boolean
ssl.cert.extension	vNames of extensions in the certificate	string
ssl.cert.serial	Serial number as an integer or hexadecimal string	integer / string
ssl.cert.pubkey.bits	Number of bits in the public key	integer
ssl.cert.pubkey.type	Public key type	string
ssl.cipher.version	SSL version of the preferred cipher	string
ssl.cipher.bits	Number of bits in the preferred cipher	integer
ssl.cipher.name	Name of the preferred cipher	string

Telnet Filters

Name	Description	Type
telnet.option	Search all the options available	string
telnet.do	The server requests the client does support these options	string
telnet.dont	The server requests the client not to support these options	string
telnet.will	The server supports these options	string
telnet.wont	The server doesn’t support these options	string

Credits: JavierOlmedo

Hopefully, with this tutorial, you were able to get all the necessary information you need about using shodan.

As you can probably see, shodan is an excellent tool with both good and bad aspects. Its shows how easily hackers can hack our devices by using exploits and misconfigurations to bypass all our security and gain unauthorized access to our devices connected on the internet.

How to secure your devices on the internet?

Make sure you change the default password configuration of devices on the internet
Services that do not require the internet should not be connected to the internet.
Devices should be updated and regularly checked
Use proper firewalls and antivirus for protecting devices
Read our article on how to secure your account from hackers

Automated Tools

Hacking With Shodan (How to use Shodan Guide)

Table of contents

What is Shodan?

How does Shodan work?

Shodan can show researchers and pentesters:

How to use shodan?