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Cybersecurity researchers have uncovered a coordinated campaign that leveraged 131 rebranded clones of a WhatsApp Web automation extension for Google Chrome to spam Brazilian users at scale. The 131 spamware extensions share the same codebase, design patterns, and infrastructure, according to supply chain security company Socket. The browser add-ons collectively have about 20,905 active users. "They are not classic malware, but they function as high-risk spam automation that abuses platform rules," security researcher Kirill Boychenko said. "The code injects directly into the WhatsApp Web page, running alongside WhatsApp's own scripts, automates bulk outreach and scheduling in ways that aim to bypass WhatsApp's anti-spam enforcement." The end goal of the campaign is to blast outbound messaging via WhatsApp in a manner that bypasses the messaging platform's rate limits and anti-spam controls. The activity is assessed to have been ongoing for at lea...

China on Sunday accused the U.S. National Security Agency (NSA) of carrying out a "premeditated" cyber attack targeting the National Time Service Center ( NTSC ), as it described the U.S. as a "hacker empire" and the "greatest source of chaos in cyberspace." The Ministry of State Security (MSS), in a WeChat post , said it uncovered "irrefutable evidence" of the agency's involvement in the intrusion that dated back to March 25, 2022. The attack was ultimately foiled, it added. Established in 1966 under the jurisdiction of the Chinese Academy of Sciences (CAS), NTSC is responsible for generating, maintaining, and transmitting the national standard of time (Beijing Time). "Any cyberattack damaging these facilities would jeopardize the secure and stable operation of 'Beijing Time,' triggering severe consequences such as network communication failures, financial system disruptions, power supply interruptions, transportation paraly...

Europol on Friday announced the disruption of a sophisticated cybercrime-as-a-service (CaaS) platform that operated a SIM farm and enabled its customers to carry out a broad spectrum of crimes ranging from phishing to investment fraud. The coordinated law enforcement effort, dubbed Operation SIMCARTEL , saw 26 searches carried out, resulting in the arrest of seven suspects and the seizure of 1,200 SIM box devices , which contained 40,000 active SIM cards. Five of those detained are Latvian nationals. In addition, five servers were dismantled and two websites (gogetsms[.]com and apisim[.]com) advertising the service was taken over on October 10, 2025, to display a seizure banner. Separately, four luxury vehicles were confiscated, and €431,000 ($502,000) in suspects' bank accounts and €266,000 ($310,000) in their cryptocurrency accounts were frozen. The countries that participated in the operation comprised authorities from Austria, Estonia, Finland, and Latvia, in collaboration...

Cybersecurity researchers have shed light on a new campaign that has likely targeted the Russian automobile and e-commerce sectors with a previously undocumented .NET malware dubbed CAPI Backdoor . According to Seqrite Labs , the attack chain involves distributing phishing emails containing a ZIP archive as a way to trigger the infection. The cybersecurity company's analysis is based on the ZIP artifact that was uploaded to the VirusTotal platform on October 3, 2025. Present with the archive is a decoy Russian-language document that purports to be a notification related to income tax legislation and a Windows shortcut (LNK) file. The LNK file, which has the same name as the ZIP archive (i.e., "Перерасчет заработной платы 01.10.2025"), is responsible for the execution of the .NET implant ("adobe.dll") using a legitimate Microsoft binary named " rundll32.exe ," a living-off-the-land (LotL) technique known to be adopted by threat actors. The backd...

The threat actors behind a malware family known as Winos 4.0 (aka ValleyRAT) have expanded their targeting footprint from China and Taiwan to target Japan and Malaysia with another remote access trojan (RAT) tracked as HoldingHands RAT (aka Gh0stBins). "The campaign relied on phishing emails with PDFs that contained embedded malicious links," Pei Han Liao, researcher with Fortinet's FortiGuard Labs, said in a report shared with The Hacker News. "These files masqueraded as official documents from the Ministry of Finance and included numerous links in addition to the one that delivered Winos 4.0." Winos 4.0 is a malware family that's often spread via phishing and search engine optimization (SEO) poisoning, directing unsuspecting users to fake websites masquerading as popular software like Google Chrome, Telegram, Youdao, Sogou AI, WPS Office, and DeepSeek, among others. The use of Winos 4.0 is primarily linked to an "aggressive" Chinese cybercri...

The North Korean threat actor linked to the Contagious Interview campaign has been observed merging some of the functionality of two of its malware programs, indicating that the hacking group is actively refining its toolset. That's according to new findings from Cisco Talos, which said recent campaigns undertaken by the hacking group have seen the functions of BeaverTail and OtterCookie coming closer to each other more than ever, even as the latter has been fitted with a new module for keylogging and taking screenshots.  The activity is attributed to a threat cluster that's tracked by the cybersecurity community under the monikers CL-STA-0240, DeceptiveDevelopment, DEV#POPPER, Famous Chollima, Gwisin Gang, PurpleBravo, Tenacious Pungsan, UNC5342, Void Dokkaebi, and WaterPlum. The development comes as Google Threat Intelligence Group (GTIG) and Mandiant revealed the threat actor's use of a stealthy technique known as EtherHiding to fetch next-stage payloads from the...