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op.gg Domain Breach Exposure Report

Risk Score

High Risk

Massive event volume or critical assets compromised.

AI Findings Summary

Critical

The domain op.gg has experienced a significant exposure event, with over 149,000 total events recorded between July 2025 and June 2026. The majority of these events, approximately 81%, are classified as historical data breaches, impacting over 121,000 clients. Additionally, nearly 20% of events are active infostealer logs, totaling over 28,000 instances. The timeline shows a notable increase in client-related events from March 2026 onwards, coinciding with a rise in employee-related events in April 2026. The primary source of leaked data appears to be combolist sources, indicating potential credential stuffing attacks. Malware families such as Rhadamanthys, LummaC2, and Redline are frequently observed, suggesting a focus on credential harvesting and data exfiltration.

Total Events

149,829
credential exposure events

Employee Affected Events

122
account email domain = op.gg

Client Affected Events

149,707
service target = op.gg

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12-Month Events Timeline

Event volume by breach date, employee VS client

EmployeesClients
40,00026,66713,3330
peak month 36,720
Jul 25Sep 25Nov 25Jan 26Mar 26May 26Jun 26

Infostealers VS Data Breaches

Live stealer logs VS data breaches

Infostealer logs
Events28,660
Share19%
Data breaches
Events121,169
Share81%
Infostealer logs (19%)
28,660events
Data breaches (81%)
121,169events

122 compromised employee accounts pose an infrastructure risk, while 149,707 leaked client credentials create regulatory liability.

Antivirus Distribution

Security Tools on Infected Endpoints

Windows Defender179
Windows Defender.27
Windows Defender [ON]8
Windows Defender ESET Security8
Malwarebytes4
None4
Windows Defender Avast Antivirus.3
Kaspersky3
Reason Cybersecurity2

Malware Families Distribution

Distribution of Active Stealer Strains

Rhadamanthys4,755
LummaC24,603
Redline4,181
Acreed2,687
Vidar1,666
StealC544
RisePro371
Millenium326
Remus192

Top Login URLs

Top exposed services found in the event results

  1. 1https://member.op.gg19,975
  2. 2member.op.gg19,242
  3. 3https://member.op.gg/19,019
  4. 4https://member.op.gg/register/sign-up18,753
  5. 5https://member.op.gg/accounts/signup13,463
  6. 6member.op.gg/register/sign-up12,885
  7. 7member.op.gg/12,238
  8. 8member.op.gg/accounts/signup7,538
  9. 9https://member.op.gg/accounts/login/email6,701
  10. 10member.op.gg/accounts/login/email3,808

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.

South Korea
Events3,235
Brazil
Events1,722
France
Events1,009
Argentina
Events856
United States
Events817
Vietnam
Events776
Egypt
Events609
Spain
Events577

Country Breakdown

  1. 1South Korea3,235
  2. 2Brazil1,722
  3. 3France1,009
  4. 4Argentina856
  5. 5United States817
  6. 6Vietnam776
  7. 7Egypt609
  8. 8Spain577

Services Classification Distribution

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

Zendesk10
Citrix2
WordPress1

Operating System Distribution

Distribution of compromised endpoint builds

Windows 112,642
Windows 11 24H2 build 26100 (64 Bit)1,731
Windows 10 22H2 build 19045 (64 Bit)1,601
Windows 10 Enterprise x641,571
Windows 10 Pro (10.0.19045) x641,071

Leak Repository Classification

Where the exposed records currently reside

0
Named breaches
121,091
Combolist pools
78
Unattributed dumps

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