In a recent cybersecurity incident involving a major bank, a misconfigured exposed backup file led to the disclosure of sensitive customer information, authentication credentials, cryptographic keys, and internal source code. This vulnerability poses serious risks of identity theft, unauthorized access, and potential exploitation of business operations. The article emphasizes the necessity for organizations to implement stricter data protection measures. Affected: major bank, customers, financial sector
Keypoints :
- An exposed backup file contained sensitive customer information and internal credentials.
- The backup file was accessible via a simple URL, leading to significant security risks.
- Customer PII included full names, mobile numbers, vehicle details, and insurance information.
- Internals like administrator credentials and authentication tokens were found in the logs.
- Compromised cryptographic keys could allow unauthorized decryption of sensitive data.
- Exposed source code may provide insights into the business logic and possible vulnerabilities.
- Organizations must secure backup storage, rotate credentials, encrypt data, and implement access controls to mitigate risks.
- Proactive attack surface monitoring is crucial to prevent such incidents from escalating.
MITRE Techniques :
- Credential Dumping (T1003): Exposed administrator credentials and authentication tokens were stored in logs allowing for potential unauthorized access to internal services.
- Data Encrypted for Impact (T1486): Compromised cryptographic keys jeopardized the confidentiality of sensitive data, enabling attackers to decrypt and access data unlawfully.
- Source Code Disclosure (T1027): Exposed source code provided insights into vulnerabilities within internal applications, which may be exploited in future attacks.
Indicator of Compromise :
- [File] Exposed backup file containing sensitive data
- [Credential] Administrator credentials found in logs
- [Token] User authentication tokens found in application error logs
- [Encryption Key] Compromised cryptographic keys for data encryption/decryption
- [Source Code] Decompiled source code of internal applications
Full Story: https://www.cloudsek.com/blog/how-a-misconfiguration-led-to-leaked-customer-data-and-security-credentials
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