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Cybersecurity researchers have found that ransomware attacks targeting ESXi systems are also leveraging the access to repurpose the appliances as a conduit to tunnel traffic to command-and-control (C2) infrastructure and stay under the radar. "ESXi appliances, which are unmonitored, are increasingly exploited as a persistence mechanism and gateway to access corporate networks widely," Sygnia researchers Aaron (Zhongyuan) Hau and Ren Jie Yow said in a report published last week. "Threat actors use these platforms by adopting 'living-off-the-land' techniques and using native tools like SSH to establish a SOCKS tunnel between their C2 servers and the compromised environment." In doing so, the idea is to blend into legitimate traffic and establish long-term persistence on the compromised network with little-to-no detection by security controls. The cybersecurity company said in many of its incident response engagements, ESXi systems were compromised eit...

While passwords remain the first line of defense for protecting user accounts against unauthorized access, the methods for creating strong passwords and protecting them are continually evolving. For example, NIST password recommendations are now prioritizing password length over complexity. Hashing, however, remains a non-negotiable. Even long secure passphrases should be hashed to prevent them from being completely exposed in the event of a data breach – and never stored in plaintext. This article examines how today's cyber attackers attempt to crack hashed passwords, explores common hashing algorithms and their limitations, and discusses measures you can take to protect your hashed passwords, regardless of which algorithm you are using. Modern password cracking techniques Malicious actors have an array of tools and methods at their disposal for cracking hashed passwords. Some of the more widely used methods include brute force attacks, password dictionary attacks, hybrid attacks...

DeepSeek, the Chinese AI startup that has captured much of the artificial intelligence (AI) buzz in recent days, said it's restricting registrations on the service, citing malicious attacks. "Due to large-scale malicious attacks on DeepSeek's services, we are temporarily limiting registrations to ensure continued service," the company said in an incident report page. "Existing users can log in as usual. Thanks for your understanding and support." Users attempting to sign up for an account are being displayed a similar message, stating "registration may be busy" and that they should wait and try again. "With the popularity of DeepSeek growing, it's not a big surprise that they are being targeted by malicious web traffic," Erich Kron, security awareness advocate at KnowBe4, said in a statement shared with The Hacker News. "These sorts of attacks could be a way to extort an organization by promising to stop attacks and rest...

The Council of the European Union has sanctioned three individuals for allegedly carrying out "malicious cyber activities" against Estonia. The three Russian nationals – Nikolay Alexandrovich Korchagin, Vitaly Shevchenko, and Yuriy Fedorovich Denisov – are officers of the General Staff of the Armed Forces of the Russian Federation (GRU) Unit 29155, it said. Per the council decision, all the individuals are said to be responsible for cyber attacks against computer systems with the aim of collecting data from the data systems of multiple institutions with an aim to gain insights into the cyber security policy of Estonia. "The cyber-attacks granted attackers unauthorized access to classified information and sensitive data stored within several government ministries — including Economic Affairs and Communications, Social Affairs, and Foreign Affairs — leading to the theft of thousands of confidential documents," per the Council . This included business secrets, h...

Apple has released software updates to address several security flaws across its portfolio, including a zero-day vulnerability that it said has been exploited in the wild. The vulnerability, tracked as CVE-2025-24085 (CVSS scores: 7.3/7.8), has been described as a use-after-free bug in the Core Media component that could permit a malicious application already installed on a device to elevate privileges. "Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 17.2," the company said in a terse advisory. The issue has been addressed with improved memory management in the following devices and operating system versions - iOS 18.3 and iPadOS 18.3 - iPhone XS and later, iPad Pro 13-inch, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 7th generation and later, and iPad mini 5th generation and later macOS Sequoia 15.3 - Macs running mac...

Multiple security vulnerabilities have been disclosed in GitHub Desktop as well as other Git-related projects that, if successfully exploited, could permit an attacker to gain unauthorized access to a user's Git credentials. "Git implements a protocol called Git Credential Protocol to retrieve credentials from the credential helper ," GMO Flatt Security researcher Ry0taK, who discovered the flaws, said in an analysis published Sunday. "Because of improper handling of messages, many projects were vulnerable to credential leakage in various ways." The list of identified vulnerabilities, dubbed Clone2Leak, is as follows - CVE-2025-23040 (CVSS score: 6.6) - Maliciously crafted remote URLs could lead to credential leaks in GitHub Desktop  CVE-2024-50338 (CVSS score: 7.4) - Carriage-return character in remote URL allows the malicious repository to leak credentials in Git Credential Manager CVE-2024-53263 (CVSS score: 8.5) - Git LFS permits retrieval of cre...

Welcome to your weekly cybersecurity scoop! Ever thought about how the same AI meant to protect our hospitals could also compromise them? This week, we're breaking down the sophisticated world of AI-driven threats, key updates in regulations, and some urgent vulnerabilities in healthcare tech that need our attention. As we unpack these complex topics, we'll equip you with sharp insights to navigate these turbulent waters. Curious about the solutions? They're smarter and more unexpected than you might think. Let's dive in. ⚡ Threat of the Week Juniper Networks Routers Targeted by J-magic — A new campaign targeted enterprise-grade Juniper Networks routers between mid-2023 and mid-2024 to infect them with a backdoor dubbed J-magic when certain precise conditions. The malware is a variant of a nearly 25-year-old, publicly available backdoor referred to as cd00r, and is designed to establish a reverse shell to an attacker-controlled IP address and port. Semiconductor, energy, manuf...

The Open Web Application Security Project has recently introduced a new Top 10 project - the Non-Human Identity (NHI) Top 10. For years, OWASP has provided security professionals and developers with essential guidance and actionable frameworks through its Top 10 projects, including the widely used API and Web Application security lists.  Non-human identity security represents an emerging interest in the cybersecurity industry, encompassing the risks and lack of oversight associated with API keys, service accounts , OAuth apps, SSH keys, IAM roles, secrets, and other machine credentials and workload identities.  Considering that the flagship OWASP Top 10 projects already cover a broad range of security risks developers should focus on, one might ask - do we really need the NHI Top 10? The short answer is - yes . Let's see why, and explore the top 10 NHI risks.  Why we need the NHI Top 10 While other OWASP projects might touch on related vulnerabilities, such as secret...

A previously unknown threat actor has been observed copying the tradecraft associated with the Kremlin-aligned Gamaredon hacking group in its cyber attacks targeting Russian-speaking entities. The campaign has been attributed to a threat cluster dubbed GamaCopy , which is assessed to share overlaps with another hacking group named Core Werewolf , also tracked as Awaken Likho and PseudoGamaredon. According to the Knownsec 404 Advanced Threat Intelligence team, the attacks leverage content related to military facilities as lures to drop UltraVNC, allowing threat actors to remotely access the compromised hosts. "The TTP (Tactics, Techniques, and Procedures) of this organization imitates that of the Gamaredon organization which conducts attacks against Ukraine," the company said in a report published last week. The disclosure arrives nearly four months after Kaspersky revealed that Russian government agencies and industrial entities have been the target of Core Werewolf, ...

Threat hunters have detailed an ongoing campaign that leverages a malware loader called MintsLoader to distribute secondary payloads such as the StealC information stealer and a legitimate open-source network computing platform called BOINC . "MintsLoader is a PowerShell based malware loader that has been seen delivered via spam emails with a link to Kongtuke/ClickFix pages or a JScript file," cybersecurity firm eSentire said in an analysis. The campaign has targeted electricity, oil and gas, and the legal services sectors in the United States and Europe, per the company, which detected the activity in early January 2025. The development comes amid a spike in malicious campaigns that are abusing fake CAPTCHA verification prompts to trick users into copying and executing PowerShell scripts to get around the checks, a technique that has come to be known ClickFix and KongTuke. "KongTuke involves an injected script that currently causes associated websites to displa...

A high-severity security flaw has been disclosed in Meta's Llama large language model (LLM) framework that, if successfully exploited, could allow an attacker to execute arbitrary code on the llama-stack inference server.  The vulnerability, tracked as CVE-2024-50050 , has been assigned a CVSS score of 6.3 out of 10.0. Supply chain security firm Snyk, on the other hand, has assigned it a critical severity rating of 9.3. "Affected versions of meta-llama are vulnerable to deserialization of untrusted data, meaning that an attacker can execute arbitrary code by sending malicious data that is deserialized," Oligo Security researcher Avi Lumelsky said in an analysis earlier this week. The shortcoming, per the cloud security company, resides in a component called Llama Stack , which defines a set of API interfaces for artificial intelligence (AI) application development, including using Meta's own Llama models. Specifically, it has to do with a remote code execution ...