atomic-red-team/atomics/T1046/T1046.md

T1046 - Network Service Scanning

Description from ATT&CK

Adversaries may attempt to get a listing of services running on remote hosts, including those that may be vulnerable to remote software exploitation. Methods to acquire this information include port scans and vulnerability scans using tools that are brought onto a system.

Within cloud environments, adversaries may attempt to discover services running on other cloud hosts. Additionally, if the cloud environment is connected to a on-premises environment, adversaries may be able to identify services running on non-cloud systems as well.

Atomic Tests

• Atomic Test #1 - Port Scan

• Atomic Test #2 - Port Scan Nmap

• Atomic Test #3 - Port Scan NMap for Windows

• Atomic Test #4 - Port Scan using python

Atomic Test #1 - Port Scan

Scan ports to check for listening ports.

Upon successful execution, sh will perform a network connection against a single host (192.168.1.1) and determine what ports are open in the range of 1-65535. Results will be via stdout.

Supported Platforms: Linux, macOS

auto_generated_guid: 68e907da-2539-48f6-9fc9-257a78c05540

Attack Commands: Run with sh!

for port in {1..65535};
do
  echo >/dev/tcp/192.168.1.1/$port && echo "port $port is open" || echo "port $port is closed" : ;
done

Atomic Test #2 - Port Scan Nmap

Scan ports to check for listening ports with Nmap.

Upon successful execution, sh will utilize nmap, telnet, and nc to contact a single or range of adresseses on port 80 to determine if listening. Results will be via stdout.

Supported Platforms: Linux, macOS

auto_generated_guid: 515942b0-a09f-4163-a7bb-22fefb6f185f

Inputs:

Name	Description	Type	Default Value
host	Host to scan.	String	192.168.1.1
port	Ports to scan.	String	80
network_range	Network Range to Scan.	String	192.168.1.0/24

Attack Commands: Run with sh!

nmap -sS #{network_range} -p #{port}
telnet #{host} #{port}
nc -nv #{host} #{port}

Dependencies: Run with sh!

Description: Check if nmap command exists on the machine

Check Prereq Commands:

if [ -x "$(command -v nmap)" ]; then exit 0; else exit 1; fi;

Get Prereq Commands:

(which yum && yum -y epel-release nmap)||(which apt-get && DEBIAN_FRONTEND=noninteractive apt-get install -y nmap)

Atomic Test #3 - Port Scan NMap for Windows

Scan ports to check for listening ports for the local host 127.0.0.1

Supported Platforms: Windows

auto_generated_guid: d696a3cb-d7a8-4976-8eb5-5af4abf2e3df

Inputs:

Name	Description	Type	Default Value
nmap_url	NMap installer download URL	Url	https://nmap.org/dist/nmap-7.80-setup.exe
host_to_scan	The host to scan with NMap	String	127.0.0.1

Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)

nmap #{host_to_scan}

Dependencies: Run with powershell!

Description: NMap must be installed

Check Prereq Commands:

if (cmd /c "nmap 2>nul") {exit 0} else {exit 1}

Get Prereq Commands:

Invoke-WebRequest -OutFile $env:temp\nmap-7.80-setup.exe #{nmap_url}
Start-Process $env:temp\nmap-7.80-setup.exe /S

Atomic Test #4 - Port Scan using python

Scan ports to check for listening ports with python

Supported Platforms: Windows

auto_generated_guid: 6ca45b04-9f15-4424-b9d3-84a217285a5c

Inputs:

Name	Description	Type	Default Value
host_ip	Host to scan.	String	127.0.0.1
filename	Location of the project file	Path	PathToAtomicsFolder\T1046\src\T1046.py

Attack Commands: Run with powershell!

python #{filename} -i #{host_ip}

Dependencies: Run with powershell!

Description: Check if python exists on the machine

Check Prereq Commands:

if (python --version) {exit 0} else {exit 1}

Get Prereq Commands:

echo "Python 3 must be installed manually"