Back

discovercard.com Domain Breach Exposure Report

Risk Score

High Risk

Massive event volume or critical assets compromised.

AI Findings Summary

Critical

The telemetry indicates a significant exposure event impacting discovercard.com, with a high risk score of 92. The primary concern stems from 34,573 historical data breaches and 3,088 active infostealer logs observed between July 2025 and June 2026. These events predominantly affected clients, totaling 37,590 instances, with a smaller but notable impact on 71 employees. The data breaches are strongly associated with "Combolist sources," suggesting credential stuffing or account takeover attempts. Infostealer activity is linked to prevalent malware families such as Rhadamanthys, Redline, and LummaC2, which are designed to exfiltrate sensitive information. The targeted services are overwhelmingly related to discovercard.com login and account management portals, indicating a direct focus on customer and potentially employee credentials.

Total Events

37,661
credential exposure events

Employee Affected Events

71
account email domain = discovercard.com

Client Affected Events

37,590
service target = discovercard.com

Free Community Account

Stop stolen credentials from logging in

Own this domain? Create a free Lunar account to see full exposure data and evidence.

12-Month Events Timeline

Event volume by breach date, employee VS client

EmployeesClients
12,0008,0004,0000
peak month 10,746
Jul 25Sep 25Nov 25Jan 26Mar 26May 26Jun 26

Infostealers VS Data Breaches

Live stealer logs VS data breaches

Infostealer logs
Events3,088
Share8%
Data breaches
Events34,573
Share92%
Infostealer logs (8%)
3,088events
Data breaches (92%)
34,573events

71 compromised employee accounts pose an infrastructure risk, while 37,590 leaked client credentials create regulatory liability.

Antivirus Distribution

Security Tools on Infected Endpoints

Windows Defender71
Windows Defender Malwarebytes34
Windows Defender Webroot SecureAnywhere6
Windows Defender Norton Security Online3
Windows Defender [ON]2
Windows Defender Norton 3602
Windows Defender.1
Malwarebytes1
Windows Defender Norton Security Suite1

Malware Families Distribution

Distribution of Active Stealer Strains

Rhadamanthys446
Redline382
LummaC2348
Acreed324
Vidar138
X-Files88
Millenium60
Blank Grabber36
RisePro27

Top Login URLs

Top exposed services found in the event results

  1. 1discovercard.com4,515
  2. 2https://www.discovercard.com3,482
  3. 3https://discovercard.com2,916
  4. 4https://www.discovercard.com/cardmembersvcs/loginlogout/app/ac_main2,644
  5. 5www.discovercard.com2,218
  6. 6https://www.discovercard.com/cardmembersvcs/loginlogout/app/signin2,203
  7. 7discovercard.com/cardmembersvcs/loginlogout/app/signin1,607
  8. 8discovercard.com/cardmembersvcs/loginlogout/app/ac_main1,538
  9. 9www.discovercard.com/cardmembersvcs/loginlogout/app/signin1,201
  10. 10https://www.discovercard.com/1,168

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
Events1,677
Venezuela
Events38
Thailand
Events26
India
Events24
Canada
Events24
Algeria
Events19
Indonesia
Events15
Peru
Events13

Country Breakdown

  1. 1United States1,677
  2. 2Venezuela38
  3. 3Thailand26
  4. 4India24
  5. 5Canada24
  6. 6Algeria19
  7. 7Indonesia15
  8. 8Peru13

Services Classification Distribution

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

-
Total

Operating System Distribution

Distribution of compromised endpoint builds

Windows 11396
Windows 11 24H2 build 26100 (64 Bit)294
Windows 10 Home x64167
Windows 10 22H2 build 19045 (64 Bit)149
Windows 10134

Leak Repository Classification

Where the exposed records currently reside

0
Named breaches
34,557
Combolist pools
16
Unattributed dumps

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