Microsoft mitigated a 3.47 Tbps DDoS attack on an Azure customer in Asia in Nov. 2021; DDoS attacks in India rose from 2% of all attacks in H1 2021 to 23% in H2
Context & Ripple Effects
This disclosure extends a record-breaking sequence: Microsoft's 2.4 Tbps mitigation in August 2021 had just broken AWS' 2.3 Tbps mark from February 2020, and three months later the same Azure platform absorbed 3.47 Tbps. The India statistic is the more strategically interesting half — the country's share of global DDoS attacks jumped from 2% to 23% in a single half-year, just as Microsoft, Amazon, and Google pledged a combined $67.5 billion in India investments with 80% of it landing in December.
The pairing matters because it suggests attack traffic is following the infrastructure: as cloud capacity and connectivity build out in India, the region shifts from attack backwater to attack target. The trajectory has only steepened since — by late 2025 Microsoft was mitigating a 15.7 Tbps Aisuru botnet attack on a single Australian endpoint, the largest cloud DDoS ever recorded.
First-order effects
- The targeted Azure customer in Asia stayed online through a 3.47 Tbps flood, but the attack resets the industry record Microsoft itself had set just months earlier — every major cloud provider's mitigation ceiling is now a published, beatable number.
Second-order effects
- India's leap from 2% to 23% of attack share puts the region's newly announced cloud investments on notice: capacity buildouts attract volumetric attacks, raising the cost of the DDoS protection tiers AWS and Google must match in that market.
Third-order effects
- If record attacks keep doubling on this cadence, DDoS mitigation capacity becomes a core competitive metric for cloud providers rather than a compliance checkbox — and attack traffic will keep redistributing toward whatever regions absorb the next wave of infrastructure investment.
The trend: Volumetric DDoS attacks are escalating record-by-record and geographically following cloud infrastructure buildout, with India's surge the clearest early signal.