ransomware | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers have discovered a new ransomware strain dubbed HybridPetya that resembles the notorious Petya / NotPetya malware, while also incorporating the ability to bypass the Secure Boot mechanism in Unified Extensible Firmware Interface (UEFI) systems using a now-patched vulnerability disclosed earlier this year. Slovakian cybersecurity company ESET said the samples were uploaded to the VirusTotal platform in February 2025. "HybridPetya encrypts the Master File Table , which contains important metadata about all the files on NTFS-formatted partitions," security researcher Martin Smolár said . "Unlike the original Petya/NotPetya, HybridPetya can compromise modern UEFI-based systems by installing a malicious EFI application onto the EFI System Partition." In other words, the deployed UEFI application is the central component that takes care of encrypting the Master File Table (MFT) file, which contains metadata related to all the files on the NTF...

U.S. Senator Ron Wyden has called on the Federal Trade Commission (FTC) to probe Microsoft and hold it responsible for what he called "gross cybersecurity negligence" that enabled ransomware attacks on U.S. critical infrastructure, including against healthcare networks. "Without timely action, Microsoft's culture of negligent cybersecurity, combined with its de facto monopolization of the enterprise operating system market, poses a serious national security threat and makes additional hacks inevitable," Wyden wrote in a four-page letter to FTC Chairman Andrew Ferguson, likening Redmond to an "arsonist selling firefighting services to their victims." The development comes after Wyden's office obtained new information from healthcare system Ascension, which suffered a crippling ransomware attack last year, resulting in the theft of personal and medical information associated with nearly 5.6 million individuals . The ransomware attack, which al...

Threat actors affiliated with the Akira ransomware group have continued to target SonicWall devices for initial access. Cybersecurity firm Rapid7 said it observed a spike in intrusions involving SonicWall appliances over the past month, particularly following reports about renewed Akira ransomware activity since late July 2025. SonicWall subsequently revealed the SSL VPN activity aimed at its firewalls involved a year-old security flaw ( CVE-2024-40766 , CVSS score: 9.3) where local user passwords were carried over during the migration and not reset. "We are observing increased threat activity from actors attempting to brute-force user credentials," the company noted . "To mitigate risk, customers should enable Botnet Filtering to block known threat actors and ensure Account Lockout policies are enabled." SonicWall has also urged users to review LDAP SSL VPN Default User Groups, describing it as a "critical weak point" if misconfigured in the con...

A new Android malware called RatOn  has evolved from a basic tool capable of conducting Near Field Communication ( NFC ) relay attacks to a sophisticated remote access trojan with Automated Transfer System ( ATS ) capabilities to conduct device fraud. "RatOn merges traditional overlay attacks with automatic money transfers and NFC relay functionality – making it a uniquely powerful threat," the Dutch mobile security company said in a report published today. The banking trojan comes fitted with account takeover functions targeting cryptocurrency wallet applications like MetaMask, Trust, Blockchain.com, and Phantom, while also capable of carrying out automated money transfers abusing George Česko, a bank application used in the Czech Republic. Furthermore, it can perform ransomware-like attacks using custom overlay pages and device locking. It's worth noting that a variant of the HOOK Android trojan was also observed incorporating ransomware-style overlay screens to d...

Cybersecurity never slows down. Every week brings new threats, new vulnerabilities, and new lessons for defenders. For security and IT teams, the challenge is not just keeping up with the news—it's knowing which risks matter most right now. That's what this digest is here for: a clear, simple briefing to help you focus where it counts. This week, one story stands out above the rest: the Salesloft–Drift breach, where attackers stole OAuth tokens and accessed Salesforce data from some of the biggest names in tech. It's a sharp reminder of how fragile integrations can become the weak link in enterprise defenses. Alongside this, we'll also walk through several high-risk CVEs under active exploitation, the latest moves by advanced threat actors, and fresh insights on making security workflows smarter, not noisier. Each section is designed to give you the essentials—enough to stay informed and prepared, without getting lost in the noise. ⚡ Threat of the Week Salesloft to Take Drift Of...

A threat actor possibly of Russian origin has been attributed to a new set of attacks targeting the energy sector in Kazakhstan. The activity, codenamed Operation BarrelFire, is tied to a new threat group tracked by Seqrite Labs as Noisy Bear. The threat actor has been active since at least April 2025. "The campaign is targeted towards employees of KazMunaiGas or KMG where the threat entity delivered a fake document related to the KMG IT department, mimicking official internal communication and leveraging themes such as policy updates, internal certification procedures, and salary adjustments," security researcher Subhajeet Singha said . The infection chain begins with a phishing email containing a ZIP attachment, which includes a Windows shortcut (LNK) downloader, a decoy document related to KazMunaiGas, and a README.txt file with instructions written in both Russian and Kazakh to run a program named "KazMunayGaz_Viewer." The email, per the cybersecurity compa...

A critical security vulnerability impacting SAP S/4HANA, an Enterprise Resource Planning (ERP) software, has come under active exploitation in the wild. The command injection vulnerability, tracked as CVE-2025-42957 (CVSS score: 9.9), was fixed by SAP as part of its monthly updates last month. "SAP S/4HANA allows an attacker with user privileges to exploit a vulnerability in the function module exposed via RFC," according to a description of the flaw in the NIST National Vulnerability Database (NVD). "This flaw enables the injection of arbitrary ABAP code into the system, bypassing essential authorization checks. Successful exploration of the defect could result in a full system compromise of the SAP environment, subverting the confidentiality, integrity, and availability of the system. In short, it can permit attackers to modify the SAP database, create superuser accounts with SAP_ALL privileges, download password hashes, and alter business processes. SecurityBri...

Story teaser text: Cybersecurity leaders face mounting pressure to stop attacks before they start, and the best defense may come down to the settings you choose on day one. In this piece, Yuriy Tsibere explores how default policies like deny-by-default, MFA enforcement, and application Ringfencing ™ can eliminate entire categories of risk. From disabling Office macros to blocking outbound server traffic, these simple but strategic moves create a hardened environment that attackers can't easily penetrate. Whether you're securing endpoints or overseeing policy rollouts, adopting a security-by-default mindset can reduce complexity, shrink your attack surface, and help you stay ahead of evolving threats. Cybersecurity has changed dramatically since the days of the "Love Bug" virus in 2001. What was once an annoyance is now a profit-driven criminal enterprise worth billions. This shift demands proactive defense strategies that don't just respond to threats—they prevent t...

Cyber threats and attacks like ransomware continue to increase in volume and complexity with the endpoint typically being the most sought after and valued target. With the rapid expansion and adoption of AI, it is more critical than ever to ensure the endpoint is adequately secured by a platform capable of not just keeping pace, but staying ahead of an ever-evolving threat landscape. SentinelOne's steadfast commitment to delivering AI-powered cybersecurity enables global customers and partners to achieve resiliency and reduce risk with real-time, autonomous protection across the entire enterprise — all from a single agent and console with a robust, rigorously tested platform that keeps the customer in control. Cybersecurity today isn't just about detection—it's about operational continuity under pressure. For example, endpoint solutions must account for encrypted traffic inspection, policy enforcement during identity compromise, and fast containment across distributed environments. ...

Cybersecurity researchers have flagged a Ukrainian IP network for engaging in massive brute-force and password spraying campaigns targeting SSL VPN and RDP devices between June and July 2025. The activity originated from a Ukraine-based autonomous system FDN3 ( AS211736 ), per French cybersecurity company Intrinsec. "We believe with a high level of confidence that FDN3 is part of a wider abusive infrastructure composed of two other Ukrainian networks, VAIZ-AS ( AS61432 ) and ERISHENNYA-ASN ( AS210950 ), and a Seychelles-based autonomous system named TK-NET ( AS210848 )," according to a report published last week. "Those were all allocated in August 2021 and often exchange IPv4 prefixes with one another to evade blocklisting and continue hosting abusive activities." AS61432 currently announces a single prefix 185.156.72[.]0/24, while AS210950 has announced two prefixes 45.143.201[.]0/24 and 185.193.89[.]0/24. The two autonomous systems were allocated in May an...

Cybersecurity today is less about single attacks and more about chains of small weaknesses that connect into big risks. One overlooked update, one misused account, or one hidden tool in the wrong hands can be enough to open the door. The news this week shows how attackers are mixing methods—combining stolen access, unpatched software, and clever tricks to move from small entry points to large consequences.  For defenders, the lesson is clear: the real danger often comes not from one major flaw, but from how different small flaws interact together. ⚡ Threat of the Week WhatsApp Patches Actively Exploited Flaw — WhatsApp addressed a security vulnerability in its messaging apps for Apple iOS and macOS that it said may have been exploited in the wild in conjunction with a recently disclosed Apple flaw in targeted zero-day attacks. The vulnerability, CVE-2025-55177 relates to a case of insufficient authorization of linked device synchronization messages. The Meta-owned company ...

Cybersecurity researchers have called attention to a cyber attack in which unknown threat actors deployed an open-source endpoint monitoring and digital forensic tool called Velociraptor , illustrating ongoing abuse of legitimate software for malicious purposes. "In this incident, the threat actor used the tool to download and execute Visual Studio Code with the likely intention of creating a tunnel to an attacker-controlled command-and-control (C2) server," the Sophos Counter Threat Unit Research Team said in a report published this week.  While threat actors are known to adopt living-off-the-land (LotL) techniques or take advantage of legitimate remote monitoring and management (RMM) tools in their attacks, the use of Velociraptor signals a tactical evolution, where incident response programs are being used to obtain a foothold and minimize the need for having to deploy their own malware.  Further analysis of the incident has revealed that the attackers used the Wind...

Picture this: Your team rolls out some new code, thinking everything's fine. But hidden in there is a tiny flaw that explodes into a huge problem once it hits the cloud. Next thing you know, hackers are in, and your company is dealing with a mess that costs millions. Scary, right? In 2025, the average data breach hits businesses with a whopping $4.44 million bill globally. And guess what? A big chunk of these headaches comes from app security slip-ups, like web attacks that snag credentials and wreak havoc. If you're in dev, ops, or security, you've probably felt that stress—endless alerts, teams arguing over who's to blame, and fixes that take forever. But hey, it doesn't have to be this way. What if you could spot those risks early, from the moment code is written all the way to when it's running in the cloud? That's the magic of code-to-cloud visibility, and it's changing how smart teams handle app security. Our upcoming webinar, "Code-to-Clou...

Cybersecurity researchers have discovered a loophole in the Visual Studio Code Marketplace that allows threat actors to reuse names of previously removed extensions. Software supply chain security outfit ReversingLabs said it made the discovery after it identified a malicious extension named "ahbanC.shiba" that functioned similarly to two other extensions – ahban.shiba and ahban.cychelloworld – that were flagged earlier this March. All three libraries are designed to act as a downloader to retrieve a PowerShell payload from an external server that encrypts files in a folder called "testShiba" on the victim's Windows desktop and demands a Shiba Inu token by instructing the victim to deposit the assets to an unspecified wallet. These efforts suggest ongoing development attempts by the threat actor. The company said it decided to dig deeper because of the fact that the name of the new extension ("ahbanC.shiba") was virtually the same as one of the t...

Every day, businesses, teams, and project managers trust platforms like Trello, Asana, etc., to collaborate and manage tasks. But what happens when that trust is broken? According to a recent report by Statista, the average cost of a data breach worldwide was about $4.88 million. Also, in 2024, the private data of over 15 million Trello user profiles was shared on a popular hacker forum. Yet, most organizations and project managers still assume that their platform's built-in backups are enough until they are not. The next few paragraphs will expose some risks of relying on these platform tools alone and how to better protect yourself and your organization from data loss with cloud backup and recovery . Why are project management tools becoming a prime target for data loss? More than 95% of businesses today rely heavily on project management tools like Trello and Asana to organize tasks, collaborate with teams, and track project milestones. However, as project managers become mor...

The financially motivated threat actor known as Storm-0501 has been observed refining its tactics to conduct data exfiltration and extortion attacks targeting cloud environments. "Unlike traditional on-premises ransomware, where the threat actor typically deploys malware to encrypt critical files across endpoints within the compromised network and then negotiates for a decryption key, cloud-based ransomware introduces a fundamental shift," the Microsoft Threat Intelligence team said in a report shared with The Hacker News. "Leveraging cloud-native capabilities, Storm-0501 rapidly exfiltrates large volumes of data, destroys data and backups within the victim environment, and demands ransom -- all without relying on traditional malware deployment." Storm-0501 was first documented by Microsoft almost a year ago, detailing its hybrid cloud ransomware attacks targeting government, manufacturing, transportation, and law enforcement sectors in the U.S., with the thr...

Cybersecurity company ESET has disclosed that it discovered an artificial intelligence (AI)-powered ransomware variant codenamed PromptLock . Written in Golang, the newly identified strain uses the gpt-oss:20b model from OpenAI locally via the Ollama API to generate malicious Lua scripts in real-time. The open-weight language model was released by OpenAI earlier this month. "PromptLock leverages Lua scripts generated from hard-coded prompts to enumerate the local filesystem, inspect target files, exfiltrate selected data, and perform encryption," ESET said . "These Lua scripts are cross-platform compatible, functioning on Windows, Linux, and macOS." The ransomware code also embeds instructions to craft a custom note based on the "files affected," and the infected machine is a personal computer, company server, or a power distribution controller. It's currently not known who is behind the malware, but ESET told The Hacker News that PromptLoc arti...