Conducting Spearphishing Simulation Campaign

What Is This

Conducting a spearphishing simulation campaign is a red team activity that emulates real-world targeted phishing attacks to assess an organization's susceptibility to social engineering threats. Unlike generic phishing campaigns that target a broad audience with mass-produced emails, spearphishing simulations use Open Source Intelligence (OSINT) to craft highly personalized messages aimed at specific individuals or roles within an organization. The goal is to test and improve the organization's detection, response, and security awareness capabilities against advanced adversary tradecraft.

This skill covers the end-to-end process of preparing and executing a spearphishing simulation: gathering intelligence on targets, developing credible pretexts, building payloads or fake lures, setting up the necessary email infrastructure, delivering the campaign, and finally tracking and analyzing the results. It maps to several MITRE ATT&CK techniques and leverages adversary simulation methodologies to provide realistic and actionable insights for defenders.

Why Use It

Spearphishing is one of the most effective attack vectors used by threat actors to gain initial access to enterprise environments. Testing an organization's ability to detect and respond to such threats is critical for understanding risk posture and identifying gaps in security controls, user awareness, and incident response processes.

Key reasons to conduct spearphishing simulation campaigns include:

• Measure Real-World Risk: Assess how susceptible employees are to targeted phishing attempts and whether existing controls (such as email filters or security awareness training) are effective.
• Test Incident Response: Evaluate how quickly and accurately the security operations center (SOC) can detect, analyze, and respond to spearphishing attempts.
• Support Compliance: Many standards (such as NIST CSF and ISO 27001) require regular security assessments, including social engineering testing.
• Improve User Awareness: Provide targeted and realistic training opportunities for employees to recognize and report sophisticated phishing tactics.

How to Use It

A successful spearphishing simulation campaign involves multiple technical and procedural phases. Below is an outline of the typical workflow, along with relevant code snippets and practical considerations.

1. OSINT and Target

Selection

Use publicly available sources (company websites, social media, LinkedIn) to gather intelligence on individuals, departments, and workflows. The more specific the information, the more convincing your pretext will be.

## Example:

Using Python to scrape LinkedIn for target names and roles
import requests
from bs4 import BeautifulSoup

def fetch_linkedin_profiles(company_url):
    response = requests.get(company_url)
    soup = BeautifulSoup(response.text, 'html.parser')
    for profile in soup.find_all('a', class_='profile-card'):
        print(profile.get('href'))

## fetch_linkedin_profiles('https://www.linkedin.com/company/happycapy/people/')

2. Pretext

Development

Create a credible scenario (pretext) that aligns with the target's role and recent activities. Example pretexts include HR notifications, finance requests, or IT support messages.

Sample Email Pretext:

Subject: Important Update to Your Benefits Package

Hi [First Name],

Due to recent changes in our benefits policy, please review the attached document and acknowledge receipt by end of day.

Best regards,
HR Team

3. Payload or Lure

Creation

Design payloads based on your assessment goals. These may involve tracking links, fake login pages, or simulated malware attachments. Ensure payloads are safe for simulation and do not cause actual harm.

Example: Tracking Link Generator (Python)

import uuid

def generate_tracking_url(base_url, user_id):
    token = str(uuid.uuid4())
    return f"{base_url}/track?user={user_id}&token={token}"

## print(generate_tracking_url('https://simphish.happycapy.com', 'alice.smith'))

4. Email Infrastructure

Setup

Use a dedicated domain and SMTP server to send campaign emails. Configure SPF, DKIM, and DMARC to increase deliverability and avoid spam filters. Open-source tools such as GoPhish (https://getgophish.com/) can automate much of this process.

GoPhish Campaign Setup:

• Register a convincing domain (e.g., happycapy-support.com)
• Configure DNS settings for SPF/DKIM/DMARC
• Create email templates and user groups within GoPhish
• Launch the campaign and monitor results

5. Execution and

Tracking

Send the emails according to the predefined schedule. Track user interactions, such as link clicks or credential submissions, using the campaign platform. Correlate events with user IDs to provide actionable reporting.

6. Analysis and

Reporting

Aggregate results to identify which users fell for the simulation, time to detection, and how the SOC responded. Provide recommendations for improving controls, awareness, or processes.

When to Use It

• During red team exercises aimed at simulating realistic adversary behavior
• As part of a continuous security assessment program to test user awareness
• Following major changes in workforce, policy, or security infrastructure
• To validate the effectiveness of security controls and incident response workflows

Important Notes

• Authorization Is Mandatory: Only conduct spearphishing simulations with explicit written permission from the organization. Unauthorized testing is illegal and unethical.
• Safety First: Ensure simulated payloads cannot cause harm or leak sensitive data. Use benign tracking mechanisms and avoid real malware.
• Transparency and Debriefing: Communicate the purpose and findings of the campaign to stakeholders. Use results as a learning opportunity, not for punitive measures.
• Compliance: Align your simulations with relevant legal, regulatory, and organizational policies, including privacy and data protection requirements.
• Technical Hygiene: Properly configure infrastructure to avoid blacklisting. Clean up domains and resources post-campaign.

By following these guidelines, security professionals can use spearphishing simulation campaigns to meaningfully improve resilience against one of the most prevalent cyberattack vectors.