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ucsd.edu Domain Breach Exposure Report

Risk Score

High Risk

Massive event volume or critical assets compromised.

AI Findings Summary

Critical

The domain ucsd.edu has experienced a significant number of data breaches, totaling 193,224 events, which constitute 95.1% of all recorded events. Additionally, there are 10,031 infostealer events, representing 4.9% of the total. The timeline indicates a surge in both employee and client-related events during September 2025 and January 2026, with substantial numbers also observed in March, April, and June 2026. The primary malware families identified are Acreed, Rhadamanthys, and LummaC2, suggesting a focus on credential harvesting and data exfiltration. Targeted services include the main ucsd.edu domain and authentication endpoints for beatriton.ucsd.edu and a5.ucsd.edu, indicating potential compromise of user credentials and access to sensitive systems. The majority of leak repository data originates from combolist sources and database dumps, further supporting the likelihood of credential stuffing and data exposure.

Total Events

203,255
credential exposure events

Employee Affected Events

131,379
account email domain = ucsd.edu

Client Affected Events

71,876
service target = ucsd.edu

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12-Month Events Timeline

Event volume by breach date, employee VS client

EmployeesClients
40,00026,66713,3330
peak month 35,885
Jul 25Sep 25Nov 25Jan 26Mar 26May 26Jun 26

Infostealers VS Data Breaches

Live stealer logs VS data breaches

Infostealer logs
Events10,031
Share5%
Data breaches
Events193,224
Share95%
Infostealer logs (5%)
10,031events
Data breaches (95%)
193,224events

131,379 compromised employee accounts pose an infrastructure risk, while 71,876 leaked client credentials create regulatory liability.

Antivirus Distribution

Security Tools on Infected Endpoints

Windows Defender133

Malware Families Distribution

Distribution of Active Stealer Strains

Acreed2,499
Rhadamanthys1,598
LummaC21,259
Redline767
Vidar328
Millenium212
X-Files132
Remus109
StealC83

Top Login URLs

Top exposed services found in the event results

  1. 1ucsd.edu31,719
  2. 2https://beatriton.ucsd.edu/account/password1,502
  3. 3https://a5.ucsd.edu/tritON/profile/SAML2/Redirect/SSO1,461
  4. 4https://beatriton.ucsd.edu/account/login1,097
  5. 5health.ucsd.edu1,071
  6. 6a5.ucsd.edu/tritON/profile/SAML2/Redirect/SSO1,048
  7. 7beatriton.ucsd.edu/account/password906
  8. 8https://a5.ucsd.edu848
  9. 9a5.ucsd.edu794
  10. 10https://beatriton.ucsd.edu767

Infostealer By Geography

Shows the distribution of Infostealer-related credential exposure events across different geographic regions. The location is determined by analyzing the metadata of the infected machines associated with each event.

United States
Events4,563
India
Events172
South Korea
Events140
Mexico
Events130
France
Events92
Canada
Events66
Philippines
Events65
Kenya
Events62

Country Breakdown

  1. 1United States4,563
  2. 2India172
  3. 3South Korea140
  4. 4Mexico130
  5. 5France92
  6. 6Canada66
  7. 7Philippines65
  8. 8Kenya62

Services Classification Distribution

Blast radius - closer to core = more critical infrastructure, size = credential volume

Microsoft1,087
Cisco (AnyConnect)327
Git141
Citrix87
WordPress49
Auth021
Microsoft Entra ID (External ID / B2C)7

Operating System Distribution

Distribution of compromised endpoint builds

Windows 112,053
Windows 10733
Windows 10 (Build 19045) (64 Bit)578
Windows 11 24H2 build 26100 (64 Bit)501
Windows 10 22H2 build 19045 (64 Bit)379

Leak Repository Classification

Where the exposed records currently reside

0
Named breaches
102,683
Combolist pools
90,541
Unattributed dumps

Disclaimer: This report includes AI-generated content. AI can make mistakes, so verify important findings independently before taking action.