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Scattered Spider
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June 22, 2026

Scattered Spider

Scattered Spider, also known as UNC3944 or Muddled Libra, is a cybercriminal group active since 2022, known for its sophisticated social engineering tactics and for targeting large organizations, particularly in the United States.

Scattered Spider (also known as UNC3944, Muddled Libra, Starfraud, Scatter Swine) is a cybercriminal group known for its sophisticated social engineering tactics. Active since 2022, the group gained notoriety for targeting large organizations, particularly in the United States.

In September 2023, Scattered Spider made headlines by attacking several large Las Vegas casinos, including MGM Resorts International and Caesars Entertainment, disrupting hotel and casino operations for several days. These attacks caused significant financial damage and highlighted the group's capabilities.

Scattered Spider has targeted a variety of sectors globally, including telecom companies, outsourcing and IT firms, financial institutions, gaming and hospitality industries, healthcare organizations and retailers.

Scattered Spider has been using several advanced tools and techniques in their operations, including: Social engineering and phishing, SIM swapping, Adversary-in-the-Middle (AITM) phishing kits, Remote Monitoring and Management (RMM) tools, and Data exfiltration tools.