The company behind the disk space analyzer TreeSize has irked some users by no longer offering support or updates for perpetual licenses beyond their maintenance period unless customers subscribe. Further frustration has come from JAM Software's long-standing policy of not providing license keys or installers to TreeSize perpetual license holders after that support period ends.

Since 2025, JAM Software has been transitioning most TreeSize editions to subscription models. Today, it sells perpetual licenses only for personal use, which include 12 months of updates, support, and “downloads of older versions, and your license,” plus the option to extend the support period. TreeSize currently has "no plans to discontinue the sale of perpetual licenses for TreeSize Personal," product manager Hendrik Christ told Ars Technica.

As perpetual-license maintenance periods expire, customers are discovering that extending support now generally requires subscribing to software they already own the right to use.

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The Indian government has fined HP India and its partners a total of 1.4 billion rupees (about $14.4 million) for working with reseller partners in the “cartelization” of computers, ink cartridges, and toner.

The Competition Commission of India (CCI) said this week that it found HP India had colluded with some channel partners to drive up the cost of bids for government contracts for computers, as well as for selling ink cartridges, toner, and other printing supplies, including graphic and digital manufacturing supplies.

It said that HP was aiming to outcompete other OEMs and discourage resellers from selling “counterfeit” ink and toner.

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One of the Russian government’s most elite hacking groups has adopted an attack, known as Clickfix, to compromise devices belonging to sensitive organizations in Ukraine, the latter country’s CERT center is warning.

Clickfix has emerged as an effective attack technique that attackers, primarily financially motivated criminals, began using in the last year or so. Websites under the control of the attackers display a CAPTCHA that requires the visitor to copy a jumble of text and paste it into the terminal. The text contains scripts that, once entered, perform malicious actions, typically by installing malware or exfiltrating sensitive data. Ukraine’s CERT said Wednesday that Sandworm, an advanced hacking unit inside the GRU, Russia’s military intelligence arm, is now using the technique.

"GhettoVibe," "ScoutCurl," and many more

The Clickfix attacks began in the spring and have continued through the summer. The campaign has resulted in the network compromise of at least one organization when a connected device was found to be infected by FreakyPoll, the name of one of Sandworm’s custom malware packages. Ukrainian authorities discovered 10 compromised websites that displayed a PowerShell command as part of a fake CAPTCHA that said it had to be passed to ensure a real human was behind the visiting device’s keyboard.

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Energy companies are raising money at IPO at their fastest pace this century, taking advantage of investors’ hunt for new ways to bet on the boom in power-intensive AI data centers.

Initial public offerings for energy firms raised $12.6 billion in the first half of this year, according to data firm Dealogic. That marks the highest half-year level since the peak of the dotcom bubble in late 1999 and the highest first-half figure on record. It is well above 2025’s full-year total of $4.3 billion.

The surge in fundraising comes as access to the vast amounts of energy needed to run data centers emerges as a bottleneck in a multi-trillion-dollar AI investment boom.

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Sheetz, a US convenience store chain, is moving its 838 locations off VMware.

Sheetz has used VMware virtualization across two Dell R440/R450-series servers at each of its locations since 2019. Now it’s migrating 12 to 14 virtual machines (VMs) in each of its stores from VMware vSphere to StorMagic’s SvHCI, “with an additional two VMs to be replaced over the coming months to transition from Windows 10 to Windows 11,” Scott Robertson, infrastructure team manager at Sheetz, told Ars Technica via email. Ultimately, Sheetz will move about 11,000 VMs from Broadcom's virtualization platform. Sheetz is still running the original Dell server hardware.

So far, Sheetz has finished migrating more than 600 stores, averaging 200 per month, according to a company announcement today. Sheetz should be finished with the migration in four months, the announcement said.

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Right on the heels of Microsoft releasing a record number of security patches, a researcher has published exploit code that can enable low-privilege Windows accounts to make sensitive changes to administrator accounts.

The exploit, which multiple researchers say works, is sending Microsoft scrambling, yet again, to patch a zero-day released by an anonymous researcher who has complained about the software maker’s handling of their bug reports. To date, the pseudonymous NightmareEclypse has published nine such exploits, including Tuesday’s HiveLegacy. The researcher said the proof-of-concept code included in the report was stripped down to prevent attackers from using it maliciously.

A “pretty powerful primitive”

HiveLegacy is an elevation-of-privilege exploit that targets a vulnerability residing in the Windows User Profile Service. It allows users (and with more work likely processes) with limited system rights to compromise an admin user's account by modifying its classes registry hive, a resource that ensures the correct application opens when certain types of files are clicked on in Windows Explorer.

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An industry-wide standard Microsoft invented to protect Windows, and later Linux, devices from firmware infections has been trivial to bypass for 13 of its 14 years of existence. The discovery was made by researchers at security firm ESET after identifying 11 firmware images, at least one from 2013, that were known to be defective but remained signed by the software company anyway.

The images are known as shims, which were invented to extend Secure Boot to Linux devices and utility software. Using a technique simple enough to be performed by novice hackers, these old, forgotten shims can be used to completely circumvent the protection, which is embedded into the UEFI (Unified Extensible Firmware Interface) of the device's motherboard. The gaffe is the result of the failure by Microsoft, which oversees the signing of shims, to revoke the publicly available images once vulnerabilities were found in them.

Threat extends to Windows and Linux users

The threat extends to Windows and Linux users alike, since the shim can be installed on devices running both operating systems. From there, an attacker can subvert the mandated chain of digitally signed firmware to install malicious firmware that loads early in the boot process and persists after either the OS is reinstalled or a hard drive is replaced.

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The federal government is warning users of home and small office routers to secure their devices as Russia state hackers continue to mass-compromise them for use in obscuring nefarious actions against sensitive organizations in the public and private sectors.

Both the Russian and Chinese governments have been compromising routers for years, sometimes in prolonged tugs-of-war to wrest control of devices the other has already commandeered. The US government has occasionally issued covert commands and taken other steps to disinfect routers. Google and other companies have also worked to disrupt the massive botnets that control compromised routers in lockstep. The actions to date are little more than whack-a-mole exercises as the operators simply replace their botnets with new ones.

Proxy networks: The go-to tool

“Russian Federal Security Service (FSB) Center 16 cyber actors continue to exploit poorly configured and vulnerable networking devices worldwide, opportunistically compromising multiple critical infrastructure sector networks,” the Cybersecurity and Infrastructure Security Agency said Monday. The hacking groups are tracked under various names, including Berserk Bear, Energetic Bear, Crouching Yeti, Dragonfly, Ghost Blizzard, and Static Tundra. The advisory was co-issued by governments from around the world, including Australia, Denmark, New Zealand, and the UK.

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Prompt injections, the malicious commands attackers embed into content to entice large language models to follow them, have been attackers’ go-to tool for turning AI platforms against their users. A well-phrased command sneaked into an email or calendar invitation is often all it takes to cause the LLM to exfiltrate sensitive data or follow other harmful actions.

Now, defenders are embracing the prompt injection, too.

A strong, sharp effect

Researchers from Tracebit on Monday said they found that placing prompt injections alongside passwords, cryptographic keys, and other secrets stored on Amazon Web Services was often all that was needed to shut down attacks from AI hacking agents. The prompts direct the attacking LLM to perform an action forbidden by its guardrails, the safety barriers AI developers erect to prevent it from taking harmful actions. The LLM responds by shutting down.

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A patch Microsoft released on Wednesday to fix a zero-day vulnerability in its Defender security engine may cause Windows machines to write files large enough to completely consume available disk space, the researcher who discovered the flaw said.

RoguePlanet, tracked as CVE-2026-50656, came to public notice in June when NightmareEclipse, the pseudonymous name used by a researcher, disclosed it along with code for exploiting it. The vulnerability allows remote attackers to gain administrative control of Windows 10 and Windows 11 machines, even when real-time protection has been disabled. Over the past few months, the anonymous researcher has published a handful of other zero-days that have sent Microsoft scrambling to develop patches.

Writing files of unlimited size

Microsoft said Wednesday that it patched RoguePlanet with an update to the Microsoft Malware Protection Engine, which is used by the Defender antivirus app. The fix will automatically be downloaded and installed without users having to take any action. Wednesday’s update also includes “defense-in-depth updates to help improve security-related features.”

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Allstate Insurance Company has accused Broadcom of haphazardly issuing audits against it because the insurance firm decided not to renew its contracts with VMware and CA Technologies.

The allegations were made in relation to a lawsuit that VMware filed against Allstate in December 2025, according to The Register. In the complaint, Broadcom alleges that Allstate failed to comply with license audits, which Broadcom claims its contract with Allstate requires.

In a June 12 filing, Allstate suggested that Broadcom issued the audits in response to Allstate deciding to end business with its companies. Allstate's statement reads:

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A Linux vulnerability that allows untrusted virtual machines to gain root access to host machines is one of two high-severity flaws to surface this week in the open source operating system.

The vulnerability resides in KVM, which is, in essence, a virtual machine app included in the kernel of many Linux distributions. The vulnerability, tracked as CVE-2026-53359, allows guest virtual machines—such as those used in cloud platforms to isolate one user’s instance from the host OS and other user instances—to break out of that container.

Januscape: A threat to cloud platforms

The vulnerability affects KVM running on both AMD and Intel processors. It exploits bugs residing in the KVM guest-side, the portion of the VM that consists of only resources like the OS or drivers present in the guest VM, rather than resources present on the host machine. The threat went unnoticed in the Linux kernel for 16 years.

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Last week, thousands of SamKnows routers were bricked after a government program ran its course.

In 2020, as part of a program conducted by the Australian Competition & Consumer Commission (ACCC), the Australian government's chief competition regulator, thousands of volunteers received routers to help test and report on the typical speed and performance of broadband plans in Australia. (More specifically, the Measuring Broadband Australia (MBA) program targeted fixed-line broadband services provided over the NBN, Australia's government-owned wholesale open-access broadband network, as well as services delivered over other access networks.)

According to the final report that the ACCC distributed, the routers are whiteboxes that were “supplied by SamKnows” and that “perform tests to measure internet performance using test servers maintained by SamKnows and hosted in Australia.”

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US rare earths produced by Washington-backed companies are flowing to Japan and South Korea, as American demand has yet to materialize despite the Trump administration’s push to develop a national supply chain.

Rare earths products produced by MP Materials, Energy Fuels and Phoenix Tailings—which together have won billions of dollars in US government support—are being sold to companies in Asia, where the scale of magnet manufacturing remains larger than the nascent production in the US.

China’s lock on global supplies of rare earths and critical minerals has become a national security concern in the US and other Western nations, since Beijing started restricting access to them. The metals are crucial to 21st-century technology and are used in the manufacturing of everything from weapons guidance systems to electric vehicle batteries.

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In the brief history of AI security, the prompt injection has quickly become the top threat. Large language models are inherently unable to distinguish between legitimate instructions provided by users and malicious ones sneaked into emails, source code, and other third-party content the models are processing. This makes it trivial to surreptitiously inject malicious commands that the LLM readily follows.

With no way to enforce this crucial boundary between trusted and untrusted sources, AI engine developers are left to erect elaborate guardrails designed to mitigate the damage rather than solve the root cause.

To date, most prompt injections have fallen into a class known as push, in which each potential victim is targeted. For example, the adversary injects malicious instructions into an individual email or calendar invitation. Because the injection must then be sent (or pushed) to each specific target, the scale of the attack is limited, hampering mass exploits that hit the Internet at large.

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Researchers have found a never-before-seen piece of macOS malware that combines a series of clever tradecraft to infect Macs with stealthy, custom-developed credential-stealing code.

The malware is delivered in two stages. The first is distributed in a disk image that masquerades as Maccy, a clipboard manager for Macs. It’s compiled as AppleScript that is notable for the way it delivers the second stage. The malware is named PamStealer because the Rust-written infostealer uses the Pluggable Authentication Modules interface built into macOS to validate the target’s login password before sending it to an attacker-controlled server.

A quieter execution chain

The use of both disk image and AppleScript is common in malware for Macs. More unusual is the way PamStealer combines them to gain stealth. When the AppleScript is double-clicked, it’s opened in the macOS Script Editor, where the malicious functionality is buried deep within the file.

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T-Mobile is asking a New York court to rule that Broadcom was contractually obligated to continue supporting its VMware perpetual licenses.

In its complaint, T-Mobile said it has tens of thousands of virtual machines using VMware software across approximately 303,140 CPU cores. It also said that it was migrating off VMware but noted the time-consuming and technical challenges involved in migrating over 1,000 applications.

It filed its lawsuit, which was first reported by The Register today, in the Supreme Court of the State of New York in August 2025 (PDF).

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