ddos
The biggest cyber security and cyberattack stories of 2025
2025 was a big year for cyber security, with major cyberattacks, data breaches, threat groups reaching new notoriety levels, and, of course, zero-day vulnerabilities exploited in incidents. Some stories, though, were more impactful or popular with our readers than others. Below are fifteen of what GeekFeed believes are the most impactful cyber security topics of […]
Aisuru botnet behind new record-breaking 29.7 Tbps DDoS attack
In just three months, the massive Aisuru botnet launched more than 1,300 distributed denial-of-service attacks, one of them setting a new record with a peak at 29.7 terabits per second. Aisuru is a huge botnet-for-hire service that provides an army of routers and IoT devices compromised via known vulnerabilities or through brute-forcing weak credentials. Internet management and infrastructure […]
Microsoft: Azure hit by 15 Tbps DDoS attack using 500,000 IP addresses
Microsoft said today that the Aisuru botnet hit its Azure network with a 15.72 terabits per second (Tbps) DDoS attack, launched from over 500,000 IP addresses. The attack used extremely high-rate UDP floods that targeted a specific public IP address in Australia, reaching nearly 3.64 billion packets per second (bpps). “The attack originated from Aisuru […]
Hacktivists target critical infrastructure, hit decoy plant
A pro-Russian hacktivist group called TwoNet pivoted in less than a year from launching distributed denial-of-service (DDoS) attacks to targeting critical infrastructure. Recently, the threat actor claimed an attack on a water treatment facility that turned out to be a realistic honeypot system set up by threat researchers specifically to observe adversaries’ movements. The compromise […]
Cloudflare mitigates new record-breaking 22.2 Tbps DDoS attack
Cloudflare has mitigated a distributed denial-of-service (DDoS) attack that peaked at a record-breaking 22.2 terabits per second (Tbps) and 10.6 billion packets per second (Bpps). DDoS attacks typically exhaust either system or network resources, aiming to make services slow or unavailable to legitimate users. Record-breaking DDoS attacks are becoming more frequent, as just three weeks ago, […]
DDoS defender targeted in 1.5 Bpps denial-of-service attack
A DDoS mitigation service provider in Europe was targeted in a massive distributed denial-of-service attack that reached 1.5 billion packets per second. The attack originated from thousands of IoTs and MikroTik routers, and it was mitigated by FastNetMon, a company that offers protection against service disruptions. “The attack reached 1.5 billion packets per second (1.5 Gpps) — one […]
Cloudflare blocks largest recorded DDoS attack peaking at 11.5 Tbps
Internet infrastructure company Cloudflare said it recently blocked the largest recorded volumetric distributed denial-of-service (DDoS) attack, which peaked at 11.5 terabits per second (Tbps). In volumetric DDoS attacks, attackers overwhelm the target with massive amounts of data, consuming the bandwidth or exhausting system resources, leaving legitimate users with no access to the targeted servers and […]
“Rapper Bot” malware seized, alleged developer identified and charged
The U.S. Department of Justice (DoJ) announced charges against the alleged developer and administrator of the “Rapper Bot” DDoS-for-hire botnet. Ethan Foltz, 22, of Eugene, Oregon, allegedly rented the botnet to cybercriminals eho targeted various organizations. The botnet operation itself was seized as part of ‘Operation PowerOff ‘on August 6, during a raid at Foltz’s residence in Oregon. […]
Europol disrupts pro-Russian NoName057(16) DDoS hacktivist group
An international law enforcement operation dubbed “Operation Eastwood” has targeted the infrastructure and members of the pro-Russian hacktivist group NoName057(16), responsible for distributed denial-of-service (DDoS) attacks across Europe, Israel, and Ukraine. Operation Eastwood was led by Europol and Eurojust with support from 12 countries. It took place on July 15, 2025, and targeted the systems and […]
Citrix warns of NetScaler vulnerability exploited in DoS attacks
Citrix is warning that a vulnerability in NetScaler appliances tracked as CVE-2025-6543 is being actively exploited in the wild, causing devices to enter a denial of service condition. “Exploits of CVE-2025-6543 on unmitigated appliances have been observed,” warns Citrix’s advisory. Tracked internally as CTX694788, CVE-2025-6543 is a critical flaw impacting NetScaler ADC and NetScaler Gateway and can […]