2.3 Million Credit and Debit Cards Leaked on Dark Web – The Rising Threat of Infostealer Malware

In a concerning revelation, cybersecurity firm Kaspersky reports that between 2023 and 2024, approximately 2.3 million credit and debit cards were leaked on the dark web. This breach is attributed to the rapid spread of infostealer malware, which infected nearly 26 million Windows devices during this period. Notably, every 14th infection resulted in stolen bank card information.¹

Understanding Infostealer Malware

Infostealers are a category of malware designed to covertly extract sensitive information from infected systems. This data often includes usernames, passwords, financial details, browsing histories, and more. Once harvested, the information is transmitted to cybercriminals, who may exploit it for financial gain, identity theft, or further malicious activities.²

How Infostealers Operate

Infostealers typically infiltrate devices through various methods, including:

Phishing Emails – Malicious attachments or links are sent to unsuspecting users, leading to malware installation.³

Compromised Websites – Visiting infected sites can result in automatic malware downloads.⁴

Malvertising – Malicious advertisements on legitimate websites trick users into downloading malware.⁵

Bundled Software – Infostealers can be hidden within seemingly legitimate software, such as game modifications or pirated applications.⁶

Once installed, the malware swiftly collects targeted data and transmits it to the attacker, often removing itself afterward to evade detection.²

Preventive Measures Against Infostealers

To safeguard against infostealer malware, consider implementing the following strategies:

1. Maintain Updated Security Software – Regularly update antivirus and anti-malware programs to detect and prevent new threats.⁷

2. Exercise Caution with Emails – Avoid opening attachments or clicking on links from unknown or untrusted sources.³

3. Download Software from Trusted Sources – Refrain from downloading software or game modifications from unofficial or dubious websites.⁴

4. Enable Multi-Factor Authentication (MFA) – Adding an extra layer of security can prevent unauthorised access, even if credentials are compromised.⁸

5. Regularly Monitor Financial Statements – Keep a close eye on bank and credit card statements for any unauthorised transactions.⁹

6. Educate and Train Employees – Ensure that staff members are aware of phishing tactics and safe browsing practices.¹⁰

7. Implement Network Security Measures – Utilise firewalls, intrusion detection systems, and regular security assessments to protect organisational networks.¹¹

By staying informed and adopting proactive security measures, individuals and organisations can significantly reduce the risk posed by infostealer malware and protect their sensitive information from cyber threats.

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References

1. Daily Hodl: 2.3 Million Credit Cards Leaked on Dark Web

2. SpyCloud: Bad News About Infostealer Malware

3. CISA: Alerts and Cybersecurity Advisories

4. Malwarebytes: Info Stealers

5. Proofpoint: Malvertising Threat Reference

6. PacketLabs: What Is Infostealer Malware?

7. Kaspersky: Infostealer Malware Trends 2024

8. NIST: Multi-Factor Authentication (MFA) Guide

9. FBI IC3: Internet Crime Complaint Center

10. Proofpoint: Cybersecurity Training and Awareness

11. NCSC UK: Cyber Essentials Overview