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Ukraine's biggest telecom operator Kyivstar has  become  the victim of a " powerful hacker attack ,” disrupting customer access to mobile and internet services. "The cyberattack on Ukraine's #Kyivstar telecoms operator has impacted all regions of the country with high impact to the capital, metrics show, with knock-on impacts reported to air raid alert network and banking sector as work continues to restore connectivity," NetBlocks  said  in a series of posts on X (formerly Twitter). Kyivstar, which is owned by Dutch-domiciled multinational telecommunication services company VEON,  serves  nearly 25 million mobile subscribers and more than 1 million home internet customers. The company said the attack was "a result of" the war with Russia and that it has notified law enforcement and special state services. While Kyivstar is working to restore the services, the internet watchdog noted that the telco is largely offline. That said, Kyivstar has yet ...

A USB Internet Modems or Data card, is a type of modem that allows your computer to receive Internet access using USB Port and connect to a GSM/CDMA network there by creating a PPPoE  ( Point to Point protocol over Ethernet) interface to your computer. Indian Security Researcher ' Rahul Sasi ' found a new Innovative critical flaw in these USB Internet Modems that allows an attacker to execute malicious code remotely, just via sending an SMS. While talking to ' The Hacker News ' , he claimed that the reported vulnerability  allows him to even hack computers remotely to gain the Meterpreter shell or  full access to the victim's PC. Vulnerability can be used by a malicious attacker for Mass exploitation, since these modems have a phone number which lies in a particular series, so all the phone numbers starting with xxxxxx1000 to xxxxxx2000 would be running a particular version of the USB modem software. USB Internet Modems are supplied with d...

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...

As Threat Actors Continuously Adapt their TTPs in Today’s Threat Landscape, So Must You Earlier this year, threat researchers at Cybersixgill released the annual report,  The State of the Cybercrime Underground .  The research stems from an analysis of Cybersixgill's collected intelligence items throughout 2022, gathered from the deep, dark and clear web. The report examines the continuous evolution of threat actors' tactics, tools, and procedures (TTPs) in the Digital Age – and how organizations can adapt to reduce risk and maintain business resilience. This article summarizes a few of the report's findings, including trends in credit card fraud, observations about cryptocurrency, AI developments and how they're lowering barriers to entry to cybercrime, and the rise of cybercriminal "as-a-service" activities. Further below, I also discuss the need for a new security approach, combining attack surface management (ASM) and cyber threat intelligence (CTI) to ...

Security researchers have discovered a set of severe vulnerabilities in 4G LTE protocol that could be exploited to spy on user phone calls and text messages, send fake emergency alerts, spoof location of the device and even knock devices entirely offline. A new research paper [ PDF ] recently published by researchers at Purdue University and the University of Iowa details 10 new cyber attacks against the 4G LTE wireless data communications technology for mobile devices and data terminals. The attacks exploit design weaknesses in three key protocol procedures of the 4G LTE network known as attach, detach, and paging. Unlike many previous research, these aren't just theoretical attacks. The researchers employed a systematic model-based adversarial testing approach, which they called LTEInspector , and were able to test 8 of the 10 attacks in a real testbed using SIM cards from four large US carriers. Authentication Synchronization Failure Attack Traceability Attack Nu...

Cybersecurity researchers have warned of a surge in retaliatory hacktivist activity following the U.S.-Israel coordinated military campaign against Iran , codenamed Epic Fury and Roaring Lion. "The hacktivist threat in the Middle East is highly lopsided, with two groups, Keymous+ and DieNet, driving nearly 70% of all attack activity between February 28 and March 2," Radware said in a Tuesday report. The first distributed denial-of-service (DDoS) attack was launched by Hider Nex (aka Tunisian Maskers Cyber Force) on February 28, 2026. According to details shared by Orange Cyberdefense, Hider Nex is a shadowy Tunisian hacktivist group that supports pro-Palestinian causes. It leverages a hack-and-leak strategy combining DDoS attacks with data breaches to leak sensitive data and advance its geopolitical agenda. The group emerged in mid-2025. In all, a total of 149 hacktivist DDoS claims were recorded targeting 110 distinct organizations across 16 countries. The attacks were...

Security researchers have been warning for years about critical security holes in the Signaling System 7 (SS7) that could allow hackers to listen in private phone calls and read text messages on a potentially vast scale, despite the most advanced encryption used by cellular networks. Cellular networks, on the other hand, have consistently been ignoring this serious issue, saying that it is a very low risk for most people, as the exploitation of the SS7 flaws requires significant technical and financial investment. But some unknown hackers have just proved them wrong by recently exploiting the design flaws in the SS7 to drain victims' bank accounts, according to a report published Wednesday by German-based newspaper Süddeutsche Zeitung. SS7 is a telephony signaling protocol created in the 1980s by telcos and powered more than 800 telecom operators across the world, including AT&T and Verizon, to interconnect and exchange data, like routing calls and texts with one a...

Twin cyber operations conducted by state-sponsored Iranian threat actors demonstrate their continued focus on compiling detailed dossiers on Iranian citizens that could threaten the stability of the Islamic Republic, including dissidents, opposition forces, and ISIS supporters, and Kurdish natives. Tracing the extensive espionage operations to two advanced Iranian cyber-groups  Domestic Kitten  (or APT-C-50) and  Infy , cybersecurity firm Check Point revealed new and recent evidence of their ongoing activities that involve the use of a revamped malware toolset as well as tricking unwitting users into downloading malicious software under the guise of popular apps. "Both groups have conducted long-running cyberattacks and intrusive surveillance campaigns which target both individuals' mobile devices and personal computers," Check Point researchers said in a new analysis. "The operators of these campaigns are clearly active, responsive and constantly seeking new att...

Popular cryptocurrency exchange platform Coinbase disclosed that it experienced a cybersecurity attack that targeted its employees. The company  said  its "cyber controls prevented the attacker from gaining direct system access and prevented any loss of funds or compromise of customer information." The incident, which took place on February 5, 2023, resulted in the exposure of a "limited amount of data" from its directory, including employee names, e-mail addresses, and some phone numbers. As part of the attack, several employees were targeted in an SMS phishing campaign urging them to sign in to their company accounts to read an important message. One employee is said to have fallen for the scam, who entered their username and password in a fake login page set up by the threat actors to harvest the credentials. "After 'logging in,' the employee is prompted to disregard the message and thanked for complying," the company said. "What hap...

This week’s ThreatsDay Bulletin tracks how attackers keep reshaping old tools and finding new angles in familiar systems. Small changes in tactics are stacking up fast, and each one hints at where the next big breach could come from. From shifting infrastructures to clever social hooks, the week’s activity shows just how fluid the threat landscape has become. Here’s the full rundown of what moved in the cyber world this week. International scam ring busted Fraudulent Call Centers Disrupted in Ukraine Authorities from the Czech Republic, Latvia, Lithuania, and Ukraine, along with Eurojust, took action against a criminal network operating call centers in Dnipro, Ivano-Frankivsk, and Kyiv that scammed more than 400 victims across Europe out of more than €10 million ($11.7 million). "The criminal group established a professional organisation with employees who received a percentage of the proceeds for each completed scam," Eur...

As technology advances, cyberattacks are becoming more sophisticated. With the increasing use of technology in our daily lives, cybercrime is on the rise, as evidenced by the fact that cyberattacks caused  92% of all data breaches  in the first quarter of 2022. Staying current with cybersecurity trends and laws is crucial to combat these threats, which can significantly impact business development.  In 2023, the cybersecurity market is expected to see new trends, and businesses must be adequately prepared for any developments. Andrey Slastenov, Head of Web Security at Gcore, shares his insights on these trends in this article. 1 —  Application security As businesses shifted online to stay afloat during the pandemic, the forecast for application security spending is projected to surpass $7.5 billion, according to  Statista . Source However, every application might be susceptible to hacking, zero-day attacks, and identity theft. Ensuring application security...

This week, a 23-year-old Serbian activist found themselves at the crossroads of digital danger when a sneaky zero-day exploit turned their Android device into a target. Meanwhile, Microsoft pulled back the curtain on a scheme where cybercriminals used AI tools for harmful pranks, and a massive trove of live secrets was discovered, reminding us that even the tools we rely on can hide risky surprises. We’ve sifted through a storm of cyber threats—from phishing scams to malware attacks—and broken down what it means for you in clear, everyday language. Get ready to dive into the details, understand the risks, and learn how to protect yourself in an increasingly unpredictable online world. ⚡ Threat of the Week Serbian Youth Activist Targeted by Android 0-Day Exploit Chain — A 23-year-old Serbian youth activist had their Android phone targeted by a zero-day exploit chain developed by Cellebrite to unlock the device and likely deploy an Android spyware called NoviSpy. The flaws combined ...

Ukraine's technical security and intelligence service is warning of a new wave of cyber attacks that are aimed at gaining access to users' Telegram accounts. "The criminals sent messages with malicious links to the Telegram website in order to gain unauthorized access to the records, including the possibility to transfer a one-time code from SMS," the State Service of Special Communication and Information Protection (SSSCIP) of Ukraine  said  in an alert. The attacks , which have been attributed to a threat cluster called "UAC-0094," originate with Telegram messages alerting recipients that a login had been detected from a new device located in Russia and urging the users to confirm their accounts by clicking on a link. The URL, in reality a phishing domain, prompts the victims to enter their phone numbers as well as the one-time passwords sent via SMS that are then used by the threat actors to take over the accounts. The modus operandi  mirrors  that ...

Not every risk looks like an attack. Some problems start as small glitches, strange logs, or quiet delays that don’t seem urgent—until they are. What if your environment is already being tested, just not in ways you expected? Some of the most dangerous moves are hidden in plain sight. It’s worth asking: what patterns are we missing, and what signals are we ignoring because they don’t match old playbooks? This week’s reports bring those quiet signals into focus—from attacks that bypassed MFA using trusted tools, to supply chain compromises hiding behind everyday interfaces. Here's what stood out across the cybersecurity landscape: ⚡ Threat of the Week Cloudflare Blocks Massive 7.3 Tbps DDoS Attack — Cloudflare said it autonomously blocked the largest distributed denial-of-service (DDoS) attack ever recorded, which hit a peak of 7.3 terabits per second (Tbps). The attack, the company said, targeted an unnamed hosting provider and delivered 37.4 terabytes in 45 seconds. It origi...

It's time of stocktaking, principal security firm are proposing their analysis to synthesize actual situation on cyber security, 2012 is widely considered a year when the malware has increased significantly thanks to the contributions of various actors that we will analyze shortly. WebSense has published a new interesting study, 2013 Threat Report , that confirms an extraordinary growth of cyber threats, the data that most of all alert the security community is the increasing number of sophisticated attacks able to elude traditional defense mechanisms. The analysis revealed that technologies most exposed to cyber attacks continue to be mobile platforms and social media, internet is confirmed as primary channel for cyber menaces, let’s consider in fact that number of malicious web sites grew nearly 600% and 85% are represented by legitimate web hosts. Another concerning phenomenon is the use of Email as vector for cyber menace, attackers consider this carrier as ...