Breach Intelligence Report 19 Nov 2025

LondonRunner

HEROIC
HEROIC Threat Intelligence Team
Email Address Password Hash
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Records Exposed 17,592
Source Type Database,Combolist
Origin Darkweb
Password Type MD5

We've observed a consistent pattern of older breaches resurfacing in recent months, often repackaged in new combolists or leveraged in credential stuffing attacks. What really struck us about this particular incident wasn't the scale—it was relatively small—but the age of the data and the specific demographic targeted. The LondonRunner breach, dating back to February 2018, involved a relatively niche community of runners in London, Ontario. The fact that this data is still circulating and potentially being used highlights the long tail of risk associated with even seemingly minor breaches.

The LondonRunner Breach: 17,592 Records of Running Community Members Exposed

In February 2018, the Canadian website LondonRunner, a hub for the running community in London, Ontario, suffered a data breach. The breach exposed the data of 17,592 users. The compromised information, including email addresses and MD5 password hashes, recently resurfaced on a prominent hacking forum. While MD5 is a weak hashing algorithm by today's standards, the age of the breach and the potential for password reuse make this a relevant threat for enterprises to consider.

The breach was discovered when the dataset was leaked on a well-known hacking forum. While the initial breach occurred over six years ago, the re-emergence of this data suggests that it is still considered valuable by threat actors. The focus on a specific geographic location and community also raises the possibility of targeted attacks against individuals or organizations connected to the LondonRunner user base.

This breach matters to enterprises because it exemplifies the enduring risk of older data breaches. Even if a breach occurred years ago and was seemingly contained, the compromised credentials can still be used in credential stuffing attacks or to gain access to other accounts. The MD5 hashing algorithm is crackable with today's computing power. This highlights the need for continuous monitoring of leaked credentials and proactive password resets for users who may have been affected by this or similar breaches.

  • Total records exposed: 17,592
  • Types of data included: Email Addresses, Password Hashes (MD5)
  • Sensitive content types: Potentially personal information related to running activities and club memberships.
  • Source structure: Database, Combolist
  • Leak location(s): Prominent hacking forum (specific URL unavailable due to ongoing forum monitoring restrictions)
  • Date of first appearance: 07-Feb-2018 (date of initial breach, resurfaced recently)

As noted by HaveIBeenPwned, this breach occurred on February 7, 2018, and has been added to their database. This allows individuals to check if their email address was among those compromised. HaveIBeenPwned Link

The re-emergence of the LondonRunner breach is a reminder of the persistent threat posed by older data leaks. Even breaches targeting smaller, niche communities can have lasting consequences, especially when weak hashing algorithms are used. Enterprises should remain vigilant in monitoring for leaked credentials and proactively mitigating the risks associated with password reuse.

Breach Breakdown

Domain N/A
Leaked Data Email Address,Password Hash
Password Types MD5
Date Leaked 19 Nov 2025
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Breach Rank #9,456 by affected users
Impact Score
1
sensitivity + scale + recency
Est. Financial Impact $127.3K fraud, phishing & misuse risk
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Identity Theft Risk Score

Risk Score: 8.7/10 - Critical

Data Exposure Analysis

Passwords Critical
Financial High
Personal Medium
Social High
Security Critical

Breach Timeline Analysis

March 2024 Multiple credentials exposed in recent data breach
January 2024 Password found in dark web marketplace
December 2023 Personal information leaked in major security incident

Security Recommendations

High Priority
Password Security

Critical: Change compromised passwords immediately and enable 2FA on all accounts

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Financial Protection

Monitor credit reports and set up fraud alerts with major credit bureaus

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