Cyber Incident Victim: Robinhood
Date:
Nov 2021
Location:
United States of America
Summary
A threat actor compromised Robinhood's customer support systems via social engineering, leading to unauthorized access of personal information for approximately 7 million individuals. The breach exposed email addresses for 5 million users, full names for 2 million, and limited additional details—including dates of birth and zip codes—for around 310 people, with a subset of 10 individuals experiencing more extensive account exposure. While sensitive financial data like Social Security or bank account numbers remained unaffected, the attacker issued an extortion demand following the intrusion. The company engaged cybersecurity firm Mandiant for investigation and emphasized transparency in its response, securing systems post-incident without disclosing ransom payment details.
| CIA Posture | Motives | Tactics, Techniques & Procedures |
|---|---|---|
| Available to members | 1 motive | 2 techniques |
| Threat Actors | Type | Location |
|---|---|---|
| 0 actors | Available to members | Available to members |
Description
On November 3, 2021, Robinhood experienced a security breach when an unauthorized individual compromised its customer support systems through a social engineering attack. The threat actor contacted a customer support employee by phone and manipulated them into granting access to internal tools. Once inside, the attacker extracted personal information from approximately 7 million customers. The compromised data included email addresses for 5 million individuals and full names for an additional 2 million people. A narrower subset of 310 customers had name, date of birth, and zip code details exposed, while 10 users suffered more extensive account information disclosure. Robinhood confirmed no Social Security numbers, bank account numbers, or debit card numbers were accessed. Following containment of the breach, the company received an extortion demand, though specific ransom terms were not disclosed. The firm engaged cybersecurity firm Mandiant to investigate the incident’s scope and origins.
Robinhood publicly disclosed the breach on November 8, 2021, emphasizing transparency under Chief Security Officer Caleb Sima’s leadership. The company secured affected systems and advised customers to monitor for phishing attempts via email while directing communications exclusively through its official app. Recommendations included verifying support contacts through in-app menus and enabling two-factor authentication. Robinhood noted passwords remained uncompromised but acknowledged a 2019 incident involving plaintext password storage, though no unauthorized access resulted from that earlier vulnerability. The breach highlighted risks to customer support infrastructure and underscored ongoing collaboration with external cybersecurity experts during remediation efforts.