The alleged breach highlights the cybersecurity risks facing digital financial institutions, raising questions about API protection, access controls and safeguards against unauthorised transactions.
A cyberattack on a Hyderabad-based non-banking financial company (NBFC) has brought the security of digital financial infrastructure into focus, highlighting the risks associated with unauthorised access to financial systems and application programming interfaces (APIs).
According to a complaint filed with the Telangana Cyber Security Bureau (TGCSB), unidentified attackers allegedly gained unauthorised access to the company’s systems and API on October 19, triggering 183 fund transfers worth more than ₹3.3 crore to 52 suspected beneficiary accounts within 87 minutes.
The incident raises broader questions about how financial institutions secure the digital interfaces used to process transactions, monitor suspicious activity and prevent unauthorised movement of funds.
Why Is API Security Important for Financial Institutions?
APIs allow different software applications and systems to communicate with one another. In financial services, they can support digital payments, account-related services, lending platforms and connections between internal systems and external service providers.
However, inadequately protected APIs can expose financial institutions to risks if attackers manage to exploit weaknesses in authentication, access permissions or transaction authorisation.
Strong API security typically involves verifying the identity of users and connected systems, restricting access to authorised functions, validating transaction requests and monitoring unusual activity.
In the Hyderabad case, the complaint points to unauthorised access involving the company’s systems and API. However, the available information does not establish the precise vulnerability exploited by the attackers or whether an API security weakness directly enabled the transfers.
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How Can Transaction Monitoring Help Detect Suspicious Activity?
Financial institutions use transaction monitoring systems to identify activity that deviates from expected patterns. These systems can flag unusual transaction volumes, repeated transfers, unexpected beneficiaries or activity that exceeds established thresholds.
Automated alerts and risk-based controls can help institutions investigate suspicious transactions and, where appropriate, delay or block transfers for additional verification.
The Hyderabad incident involved 183 unauthorised transfers between 10:31 am and 11:58 am, according to the complaint. The transactions were reportedly distributed across 52 suspected beneficiary accounts, while individual transfers ranged from ₹50,000 to ₹2 lakh, according to information attributed to a TGCSB official.
These details raise questions about when the suspicious activity was identified and whether transaction monitoring or other security controls generated alerts before the transfers were completed. The available information does not establish whether any alerts were generated or which controls were in place.
What Security Measures Can Reduce API-Related Risks?
Financial institutions can reduce exposure to API-related attacks through multiple layers of security rather than relying on a single protective measure.
These include strong authentication, restricted access permissions, encryption of sensitive data, continuous monitoring of API activity and regular security testing. Institutions can also implement transaction limits, risk-based verification and automated controls to identify unusual transfer patterns.
Monitoring access logs and maintaining an incident-response plan can help security teams investigate suspicious activity and respond quickly when a breach is detected.
Regular reviews of third-party integrations and the permissions granted to connected applications are also important, particularly where digital financial services depend on multiple interconnected systems.
What Happens After a Financial System Is Compromised?
Responding to a cyberattack involves more than identifying the initial breach. Investigators and financial institutions must also trace the movement of funds, identify beneficiary accounts, preserve digital evidence and coordinate efforts to restrict further transfers.
In the Hyderabad incident, the company reported the breach through the National Cyber Crime Reporting Portal and its chief financial officer subsequently filed a complaint with the TGCSB on October 20.
Police were reportedly able to block ₹40 lakh in the suspected beneficiary accounts. The available information does not confirm whether additional funds have since been recovered.
The TGCSB is investigating the unauthorised access and financial transactions to identify those responsible and establish the movement of the transferred money.
The420 Insight
The Hyderabad incident highlights the importance of securing the digital infrastructure that supports modern financial services. As financial institutions increasingly depend on interconnected applications and APIs, effective authentication, restricted access, real-time transaction monitoring and rapid incident response remain essential safeguards.
The precise cause of the reported breach has not been established. Determining how the attackers gained access and how the unauthorised transfers were processed will be crucial to understanding the security gaps, if any, that allowed the incident to occur.
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