Latest cybersecurity reporting from selected sources.

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 says the malicious activity resulted from a security breach and was likely the work of a competitor trying to tarnish his company's public image.

Also, More ClickFix Attacks and Teen Booters Arrested in PolandThis week, Russian hackers targeted Signal and WhatsApp users, permit-fee phishing hit U.S. applicants, ClickFix on WordPress sites, Microsoft patched 80 bugs, a 14K-router botnet, Polish teens held over DDoS tools and Finland warned of Russian, Chinese espionage. North Korean IT workers for hire.

The RondoDox botnet has been observed exploiting the critical React2Shell flaw (CVE-2025-55182) to infect vulnerable Next.js servers with malware and cryptominers. [...]

Also: Fortinet Flaws, Aisuru Botnet and Dutch Police Seize Bulletproof Host ServersThis week, the root cause of the Cloudflare outage, active exploitation of Fortinet flaws, Logitech disclosed a data breach, Microsoft headed off a record-breaking botnet attack, Dutch police seized bulletproof hosting servers and Princeton University disclosed a data breach after a phishing attack.

A newly discovered Go-based Linux botnet malware named PumaBot is brute-forcing SSH credentials on embedded IoT devices to deploy malicious payloads. [...]

Also: Iberian Blackout, Delta Faces Lawsuit Linked to CrowdStrike OutageEvery week, ISMG rounds up cybersecurity incidents and breaches around the world. This week: Mirai Botnet Exploits Flaws in GeoVision, the Iberian blackout under investigation, dueling cybersecurity advisories from India and Pakistan, Delta must face a lawsuit linked to CrowdStrike outage.

Also, BianLian Ransomware Hackers Aren't Really Mailing YouThis week, the U.S. sanctioned the Nemesis admin, Poco RAT spotted in Latin America, Apple challenged a British order to weaken encryption and the FBI warned against scam letters purportedly from BianLian. Also, a Nigerian tax scammer extradited to the U.S., a new botnet and a Webex vulnerability.

Also, AI Video Mocking Trump and Musk Disrupts HUD OfficesThis week, a U.S. Army soldier pleaded guilty, an AI video displayed to federal workers mocked Donald Trump and Elon Musk, a Saudi firm hit by ransomware, a new North Korean scam, hackers targeted Ukrainian notaries, CISA flagged two flaws, a botnet targeted Microsoft 365 and unpatched Ivanti VPNs.

Also, Alleged Gravy Analytics Breach Exposes Location DataThis week, a Russian tanker linked to cable sabotage detained in Finland, a claimed Gravy Analytics breach exposed location data, a Mirai-based botnet exploited zero-day flaws, Dell updated framework flaws and a court sentenced a Florida woman for laundering millions in romance scams.

Also: Omni Hack Exposed Customer Data; More Ivanti Vulnerabilities Come to LightThis week, police disrupted the LabHost phishing-as-a-service site, customer data compromised in Omni Hotels hack, more Ivanti vulnerabilities found, Moldovan botnet operator faces U.S. charges, Cisco warned of a data breach in Duo and a Spanish Guardia Civil contractor suffered a ransomware attack.

Also: Omni Hack Exposed Customer Data and More Ivanti VulnerabilitiesThis week, police took down the LabHost phishing-as-a-service site, customer data compromised in Omni Hotels hack, more Ivanti vulnerabilities, a Moldovan botnet operators faces U.S. charges, Cisco warned of data breach in Duo and a Spanish Guardia Civil contractor suffered a ransomware attack.

Also: A Romanian Botnet and Alcohol Counselor Monument Settles with US FTC Over AdsThis week, Sisense supply chain attack, a likely Romanian botnet, Patch Tuesday, an Apple spyware warning and AT&T notifies customers of breach. Alcohol counselor Monument shared data with Meta, a breach of Home Depot employee data, a breach at Targus and a threat actor targeted Moroccan activists.

A Romanian botnet group named 'RUBYCARP' is leveraging known vulnerabilities and performing brute force attacks to breach corporate networks and compromise servers for financial gain. [...]

Chinese threat actors are taking advantage of the poor state of edge security to breach both small and big fish.

The P2PInfect peer-to-peer (P2) worm has been observed employing previously undocumented initial access methods to breach susceptible Redis servers and rope them into a botnet

A new botnet called 'RapperBot' has emerged in the wild since mid-June 2022, focusing on brute-forcing its way into Linux SSH servers and then establishing persistence. [...]

ASUS routers have emerged as the target of a nascent botnet called Cyclops Blink, almost a month after it was revealed the malware abused WatchGuard firewall appliances as a stepping stone to gain remote access to breached networks