What Is Ransomware-as-a-Service — And Why Banks Are Its #1 Target in 2026
This Is Not a Hypothetical. Ransomware Attacks on Indian Banks Already Happened.
In July 2024, a ransomware group called RansomEXX exploited a misconfigured Jenkins server at Brontoo Technology Solutions — a collaborator of C-Edge Technologies, a joint SBI-TCS venture providing core banking infrastructure to India's cooperative and regional rural banks.
The result: nearly 300 Indian banks went offline. ATM withdrawals stopped. UPI transactions failed. NPCI was forced to isolate C-Edge from all retail payment systems. The group later claimed 142 GB of stolen data.
This was not caused by a nation-state actor with unlimited resources. It was enabled by Ransomware-as-a-Service — a model that puts enterprise-grade attack capabilities in the hands of anyone willing to pay for them.
If it happened to a SBI-TCS infrastructure provider, no Indian bank is immune.
What Is Ransomware-as-a-Service (RaaS)?
Ransomware-as-a-Service is a criminal business model where ransomware developers build and maintain attack toolkits — then lease them to affiliates who carry out the actual attacks, splitting ransom proceeds in return.
Think of it as a dark-web franchise. The developer handles the malware, payment infrastructure, and victim communications. The affiliate just needs a target, an entry point, and a willingness to act.
How the RaaS attack chain works inside a bank:
Reconnaissance — Affiliates scan for exposed systems: unpatched VPNs, misconfigured cloud servers, or credentials available on dark web marketplaces
Initial Access — Entry via phishing, exploited vulnerabilities, or purchased stolen credentials
Persistence and Lateral Movement — Attackers dwell inside the network for weeks, escalating privileges and mapping critical banking systems before anyone notices
Payload Deployment — Ransomware detonates across core banking servers, payment gateways, and backup systems simultaneously
Double Extortion — Files are encrypted AND sensitive customer data is exfiltrated. The bank faces two demands: pay to decrypt, and pay to prevent a public data leak
Triple Extortion (2026) — Some RaaS groups now threaten to directly notify RBI or SEBI of the breach unless an additional payment is made
Why Ransomware Attacks on Banks Keep Rising in 2026
Ransomware groups target where leverage is highest. Banks offer exactly what attackers need:
High-value data — Customer PII, transaction records, loan data, and card details that can be weaponised or sold
Zero tolerance for downtime — Even 4 hours of ATM or UPI outage triggers regulatory scrutiny, customer panic, and severe brand damage, creating immense pressure to pay
Interconnected third-party infrastructure — One compromised vendor can cascade across hundreds of institutions simultaneously, as the C-Edge incident proved
The data on ransomware attacks on banks makes it undeniable:
Median ransom demand in financial services hit $3 million — the highest across all sectors
59% of financial services organisations hit by ransomware had their data successfully encrypted — up from 49% the prior year
44% of all breaches in Verizon's 2025 DBIR involved ransomware
Cyber fraud in India's banking sector jumped nearly 40% in the first half of 2025 vs. the same period in 2024, per RBI data
CERT-In has issued multiple targeted advisories warning Indian banks about ransomware campaigns exploiting third-party and supply chain vulnerabilities
The C-Edge attack followed the classic RaaS playbook exactly — third-party entry point, misconfigured server, lateral spread, and payment system shutdown. In 2026, this playbook is being replicated across Indian banking infrastructure with increasing frequency.
RBI Advisory for Ransomware in India: What Banks Must Comply With
The Reserve Bank of India has significantly tightened its cybersecurity posture requirements in direct response to the surge in ransomware attacks on banks. For IT Managers, Security Heads, and CXOs, the following mandates are non-negotiable:
Board-approved Cyber Security Policy that explicitly addresses ransomware incident scenarios and recovery timelines
AES-256 minimum encryption for all sensitive data in transit and at rest — including backup infrastructure ransomware cannot bypass
Quarterly Disaster Recovery drills with defined Recovery Point Objectives (RPO) and Recovery Time Objectives (RTO) benchmarked to system criticality
Immutable backup requirements to prevent ransomware from destroying the very systems needed for recovery
Mandatory third-party vendor oversight with regular security assessments — directly addressing the supply chain attack vector that the C-Edge breach exploited
Incident reporting timelines requiring banks to notify RBI within defined windows following a confirmed ransomware event
Non-compliance is not just a regulatory liability. It signals the exact security gaps that RaaS affiliates actively scan for before selecting their next target.
🔗 Related: Top 10 Cybersecurity Threats Facing Banks in 2026 — And How to Stop Them
How to Stop Banks Ransomware Attacks: The Security Stack That Works
No single control stops ransomware. Banks that survive attacks — and recover in hours rather than weeks — operate layered, proactive defences across every stage of the attack chain:
Prevention — Before Ransomware Deploys:
Extended Detection and Response (XDR): SentinelOne XDR detects ransomware behaviour before execution — including EDR-killer techniques like Bring Your Own Vulnerable Driver (BYOVD) that modern RaaS affiliates use to blind endpoint agents before detonating the payload
Zero Trust Network Access (ZTNA): Twingate-powered ZTNA verifies identity and device posture before any system access is granted, stopping lateral movement even after initial access is achieved
Privileged Access Management (PAM): Credential vaulting and rotation for all high-privilege accounts closes the most common ransomware escalation path
SASE: Cato Networks SASE enforces consistent Zero Trust policies across all branches, remote users, and cloud workloads — eliminating the perimeter gaps RaaS affiliates rely on
Detection and Containment — During an Attack:
24×7 Managed SOC with AI-SIEM: Detects ransomware behavioural indicators — mass file encryption activity, anomalous privilege escalation, unusual lateral traffic — and triggers automated containment before the payload fully detonates
Network Segmentation: Isolates critical systems so a breach in one segment cannot cascade into core banking infrastructure or payment gateways
Recovery — After an Attack:
Immutable, Air-Gapped Backups: Mature immutable backup infrastructure restores priority systems in 4–6 hours. Weak or untested backup setups stretch recovery to 3–7 days — with full regulatory scrutiny throughout
Tested Incident Response Playbooks: RBI mandates DR drills, but most banks confuse documentation with readiness. Quarterly simulated ransomware tabletop exercises are the difference between 6-hour recovery and 6-day shutdown
Find Out If Your Bank Is Ready Before Ransomware Does
Most banks only discover their security gaps after an attack is already underway. NetNXT's security team assesses your ransomware exposure across endpoints, network, third-party access, backup infrastructure, and RBI compliance posture — before attackers find what you've missed.
Book a Ransomware Readiness Assessment with NetNXT →
How NetNXT Protects Indian Banks Against Ransomware-as-a-Service
NetNXT is a Gurugram-based MSSP with 11+ years of experience and 500+ enterprise clients across India. Our banking security architecture is built to neutralise ransomware at every stage of the RaaS kill chain:
SentinelOne XDR — Pre-execution ransomware detection, automated rollback, and full EDR-killer defence across all endpoints and banking servers
Twingate ZTNA — Identity and device-verified access that eliminates the lateral movement ransomware-as-a-service attacks depend on
Cato Networks SASE — Converged network and security architecture enforcing Zero Trust consistently across your entire distributed banking environment
JumpCloud IAM and PAM — Credential vaulting, MFA enforcement, and least-privilege access controls that shut the most common ransomware entry points
24×7 Managed SOC with AI-SIEM — Continuous threat hunting and behavioural detection that identifies ransomware in its dwell phase — before a single file is encrypted
Scrut Compliance Automation — Continuous, audit-ready compliance evidence for RBI, PCI DSS, and ISO 27001, so a compliance gap never becomes an attacker's opportunity
🔗 See how NetNXT secured a banking and insurance client: IT-Enabled Services for Banking and Insurance — Case Study 🔗 Related: 24×7 SOC with AI-SIEM: Build vs. Outsource
Conclusion
Ransomware-as-a-Service has industrialised cybercrime. It no longer takes a sophisticated actor to bring a bank's payment infrastructure offline — it takes one misconfigured server and an affiliate with a RaaS subscription.
The C-Edge ransomware attack on Indian banks was not an anomaly. It was a preview.
With ransom demands hitting $3 million, 59% encryption success rates, and RBI tightening its advisory posture on ransomware for Indian banking, the window to build your defences is shrinking. NetNXT exists to make sure your institution is never on the wrong side of that equation.
Speak to a NetNXT Banking Security Specialist Today →
FAQs
1) What is Ransomware-as-a-Service and how does it work?
Ransomware-as-a-Service is a criminal business model where ransomware developers lease attack toolkits to affiliates who carry out attacks in exchange for a revenue share. The developer manages the malware and payment infrastructure while the affiliate handles target selection and deployment — lowering the technical barrier for ransomware attacks to near zero.
2) Which Indian banks have been hit by ransomware attacks?
The most significant ransomware attack on Indian banking infrastructure occurred in July 2024, when RansomEXX targeted C-Edge Technologies — a SBI-TCS joint venture — through a misconfigured Jenkins server, taking nearly 300 cooperative and regional rural banks offline and disrupting ATM and UPI services nationwide. CERT-In has since issued multiple advisories warning of ongoing ransomware campaigns targeting Indian banks.
3) What is the RBI advisory for ransomware in Indian banking?
The RBI's cybersecurity framework requires Indian banks to maintain a Board-approved Cyber Security Policy, enforce AES-256 encryption, conduct quarterly DR drills, maintain immutable backups, oversee third-party vendor security, and report ransomware incidents within defined regulatory timelines. These mandates have been progressively tightened in direct response to the surge in ransomware attacks on banks.
4) What is double extortion ransomware and why does it hit banks hardest?
Double extortion is when attackers both encrypt systems and exfiltrate sensitive data — threatening public leaks unless a second ransom is paid. Banks are hit hardest because customer data exposure simultaneously triggers RBI reporting obligations, regulatory penalties, reputational collapse, and mass customer churn.
5) How can Indian banks prevent ransomware attacks in 2026?
Effective protection requires a layered stack: SentinelOne XDR for pre-execution detection, Twingate ZTNA to block lateral movement, JumpCloud PAM to secure privileged credentials, Cato Networks SASE for consistent network-wide Zero Trust, a 24×7 managed SOC with AI-SIEM for real-time behavioural detection, and immutable air-gapped backups for fast recovery — all aligned to RBI's cybersecurity advisory requirements.