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packetmail: An Open Source Script for Threat Intelligence | OpenSec Atlas

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Threat Intelligence

Script

packetmail

A Perl script that performs IP reputation lookups using the Packetmail.net API to provide threat intelligence.

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About This Tool

Packetmail.net Intel Lookup for IPs

Primary Use Case

This tool is used by security analysts and threat hunters to quickly gather reputation and threat intelligence on IP addresses from the Packetmail.net service. It supports extracting IPs from clipboard or command line arguments, making it useful for rapid OSINT investigations and network monitoring.

Key Features

Performs IP reputation lookups using Packetmail.net API
Accepts IPs from command line arguments or clipboard
Supports proxy configuration for network environments behind proxies
Outputs detailed reputation data including blocklist and threat info
Simple CLI usage with help command
Requires Packetmail API key for access

Insights & Recommendations

Users must obtain a valid Packetmail API key by contacting Nathan before using the tool. Proxy settings need manual configuration within the script if operating behind a proxy. The tool is designed for command-line usage and requires Perl environment setup.

Installation

Ensure Perl is installed on your system
Contact Nathan to obtain a Packetmail API key
Download or clone the packetmail.pl script from the repository
Configure proxy details in the script if running behind a proxy
Set PROXY_TEST = 'pass' in the script if using a proxy
Run the script using Perl with appropriate IP arguments or clipboard data

Usage

perl packetmail.pl

Extracts IPs from clipboard and performs Packetmail intel lookup

perl packetmail.pl [ip1] [ip2] ...

Performs Packetmail intel lookup for the specified IP addresses

perl packetmail.pl help

Displays usage instructions and command help

Smart Usage Notes

Integrate with SIEM platforms to automate IP reputation enrichment during alert triage.Use as a quick lookup tool in threat hunting workflows to validate suspicious IP addresses.Combine with automated network monitoring scripts to flag and isolate malicious IPs in real-time.Leverage proxy support to enable use in segmented or restricted network environments.Incorporate into purple team exercises to simulate attacker reconnaissance and defender detection capabilities.