Anti-DDoS Firm Heaped Attacks on Brazilian ISPs

A Brazilian tech firm that specializes in protecting networks from distributed denial-of-service DDoS attacks has been enabling a botnet responsible for an extended campaign of massive DDoS attacks against other network operators in Brazil, KrebsOnSecurity has learned. The firm's chief executive...

SystemBC C2 Server Reveals 1,570+ Victims in The Gentlemen Ransomware Operation

Threat actors associated with The Gentlemen ransomware‑as‑a‑service RaaS operation have been observed attempting to deploy a known proxy malware called SystemBC. According to new research published by Check Point, the command-and-control C2 or C&C server linked to SystemBC has led to the discover...

New Mirai Variant Nexcorium Hijacks DVR Devices for DDoS Attacks

Cybersecurity researchers at Fortinet have discovered Nexcorium, a new Mirai-based malware targeting TBK DVR systems to turn them into a botnet for DDoS attacks...

Newly Discovered PowMix Botnet Hits Czech Workers Using Randomized C2 Traffic

Cybersecurity researchers have warned of an active malicious campaign that's targeting the workforce in the Czech Republic with a previously undocumented botnet dubbed PowMix since at least December 2025. "PowMix employs randomized command-and-control C2 beaconing intervals, rather than persisten...

PowMix botnet targets Czech workforce

Cisco Talos discovered an ongoing malicious campaign, operating since at least December 2025, affecting a broader workforce in the Czech Republic with a previously undocumented botnet we call "PowMix." PowMix employs randomized command-and-control C2 beaconing intervals, rather than persistent...

13.5M Device Botnet Drives 2 Tbps DDoS Attacks on FinTech, Qrator Finds

A new Qrator Labs report reveals that the largest DDoS botnet has grown to 13.5 million devices, and…...

ThreatsDay Bulletin: Hybrid P2P Botnet, 13-Year-Old Apache RCE and 18 More Stories

Thursday. Another week, another batch of things that probably should've been caught sooner but weren't. This one's got some range — old vulnerabilities getting new life, a few "why was that even possible" moments, attackers leaning on platforms and tools you'd normally trust without thinking twic...

Masjesu Botnet Emerges as DDoS-for-Hire Service Targeting Global IoT Devices

Cybersecurity researchers have lifted the curtain on a stealthy botnet that's designed for distributed denial-of-service DDoS attacks. Called Masjesu , the botnet has been advertised via Telegram as a DDoS-for-hire service since it first surfaced in 2023. It's capable of targeting a wide range of...

Over 1,000 Exposed ComfyUI Instances Targeted in Cryptomining Botnet Campaign

An active campaign has been observed targeting internet-exposed instances running ComfyUI, a popular stable diffusion platform, to enlist them into a cryptocurrency mining and proxy botnet. "A purpose-built Python scanner continuously sweeps major cloud IP ranges for vulnerable targets,...

Masjesu Rising: The Commercial IoT Botnet Built for Stealth, DDoS, and IoT Evasion

Masjesu Rising: The Commercial IoT Botnet Built for Stealth, DDoS, and IoT Evasion By Mohideen Abdul Khader F · April 7, 2026 Botnet overview The Masjesu botnet, a sophisticated, commercially-run Internet of Things IoT threat, has been operational and evolving since early 2023, continuing into...

ML Defender (ARGus NDR): An Open-Source Embedded ML NIDS for Botnet and Anomalous Traffic Detection in Resource-Constrained Organizations

Ransomware and DDoS attacks disproportionately impact hospitals, schools, and small organizations that cannot afford enterprise security solutions. We present ML Defender aRGus NDR, an open-source network intrusion detection system built in C++20, deployable on commodity hardware at approximately...

Mirai Malware Evolves into Hundreds of Variants Driving Botnet Growth

Mirai malware evolves into hundreds of variants, driving botnet growth, including Aisuru and KimWolf, powering large-scale attacks, and increasing risks to vulnerable IoT devices worldwide...

Russian Hacker Sentenced to 2 Years for TA551 Botnet-Driven Ransomware Attacks

The U.S. Department of Justice DoJ said a Russian national has been sentenced to two years in prison for managing a botnet that was used to launch ransomware attacks against U.S. companies. Ilya Angelov, 40, of Tolyatti, Russia, was also fined $100,000. Angelov, who went by the online aliases...

Global Crackdown Dismantles 4 Botnets Behind Major DDoS Attacks

Global crackdown dismantles Aisuru, KimWolf, JackSkid and Mossad botnets behind major DDoS attack campaigns targeting millions of devices worldwide...

Authorities Disrupt SocksEscort Proxy Botnet Exploiting 369,000 IPs Across 163 Countries

A court-authorized international law enforcement operation has dismantled a criminal proxy service named SocksEscort that enslaved thousands of residential routers worldwide into a botnet for committing large-scale fraud. "SocksEscort infected home and small business internet routers with malware...

KadNap Malware Infects 14,000+ Edge Devices to Power Stealth Proxy Botnet

Cybersecurity researchers have discovered a new malware called KadNap that's primarily targeting Asus routers to enlist them into a botnet for proxying malicious traffic. The malware, first detected in the wild in August 2025, has expanded to over 14,000 infected devices, with more than 60% of...

How the Graph Construction Technique Shapes Performance in IoT Botnet Detection

The increasing incidence of IoT-based botnet attacks has driven interest in advanced learning models for detection. Recent efforts have focused on leveraging attention mechanisms to model long-range feature dependencies and Graph Neural Networks GNNs to capture relationships between data instance...

New Aeternum C2 Botnet Evades Takedowns via Polygon Blockchain

Qrator Research Lab has identified Aeternum C2, a botnet that uses the Polygon blockchain for commands, making it nearly impossible to shut down...

Aeternum C2 Botnet Stores Encrypted Commands on Polygon Blockchain to Evade Takedown

Cybersecurity researchers have disclosed details of a new botnet loader called Aeternum C2 that uses a blockchain-based command-and-control C2 infrastructure to make it resilient to takedown efforts. "Instead of relying on traditional servers or domains for command-and-control, Aeternum stores it...

Kimwolf Botnet Swamps Anonymity Network I2P

For the past week, the massive "Internet of Things" IoT botnet known as Kimwolf has been disrupting The Invisible Internet Project I2P, a decentralized, encrypted communications network designed to anonymize and secure online communications. I2P users started reporting disruptions in the network...