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Microsoft has released this week a new Entra security feature designed to help incident responders track down compromised accounts and malicious activity across organizations.

The new feature is named Linkable Identifiers, sometimes also referred to as Linkable Token Identifiers in some of the Microsoft documentation pages—because, of course, anything Microsoft has to also be confusing.

It is a newly designed mechanism that generates multiple unique identifiers that are embedded inside user access tokens after users authenticate via Entra ID.

Over the past weekend, Microsoft disclosed a zero-day vulnerability that was being exploited in the wild against its SharePoint servers.

Since then, there have been dozens of reports published on the same attacks, and details have come at us from different sources, with varying degrees of information, depending on what was available at the time of each report.

Below, I've tried to gather and simplify all the major points about this attack, so we have a clear picture of what's what. Tbh, I'm doing this more for myself than my readers, since I've also kind of lost track of all the reporting surrounding this topic.

The number of public SMS blasting incidents has slowly increased over the past year, in a clear sign of a rising problem.

SMS blasters are devices that mimic a mobile base station to trick nearby phones into connecting to them. They are a variation of IMSI catchers (aka cell-site simulators, fake base stations, or stingrays), but instead of intercepting mobile traffic to snoop on a target and track their location, SMS blasters are designed to automatically send SMS messages to all users trapped in the fake base station's coverage.

The devices have been used to mass-spam mobile devices over the past decade, typically at organized events, such as concerts, political rallies, or other mass gatherings, and for silly marketing purposes.

At least one cybercrime group is using a new phishing technique that bypasses FIDO keys and grants attackers access to user accounts.

The new technique has been used in the wild by a threat actor known as PoisonSeed.

Earlier this year, the group was involved in phishing campaigns targeting the cryptocurrency community and designed to steal assets from their crypto-wallets.

Recent reporting that the Spanish government had awarded  €12.3 million to Huawei to manage storage for the government's lawful intercept (LI) system struck us as a terrible idea. 

Digging a bit deeper, it turns out the truth is more understandable but far worse. These contracts were awarded over the last few years and were a continuation of an existing arrangement. Huawei has been involved in Spain's lawful intercept (LI) system since 2004. 

It is time to rip the bandaid off. 

Microsoft has added a new security feature to Windows 11 that will mitigate an entire class of filesystem redirection attacks.

The new RedirectionGuard feature is currently under testing in Windows 11 Insider builds.

It works by blocking a type of file redirection known as a junction, or a soft link. This allows users to create a link between two folders, so when users or processes access that folder, they get automatically redirected to the target directory somewhere else on the same system.

More than 12 years after the issue was first reported, the Association of American Railroads is replacing an insecure railroad protocol that can be abused to engage brakes and bring trains to sudden stops anywhere across North America.

The issue impacts a radio protocol that links locomotives (Head-of-Train) to devices mounted on the last wagon, a flashing red light known in the industry as an End-of-Train device or a FRED (Flashing Red End Device).

This device is primarily used to collect telemetry from the back of trains. It is useful especially for long freight trains that can often go over one or two miles in length and which cannot be easily inspected.

Security updates are being shipped out to mobile operators across the world to fix vulnerabilities in more than two billion eSIMs.

The vulnerabilities impact Kigen's eUICC (embedded Universal Integrated Circuit Card), a software package provided to mobile network operators to support eSIM technology.

eSIMs allow mobile operators to ship a software-based SIM to a device. The technology is mainly used for issuing temporary SIMs to travelers and to add mobile connectivity to IOT devices that can't fit a SIM card slot.

A small number of key individuals are organising the activities of the group known as Scattered Spider, according to researchers at security firms. If it's true, there is hope that targeted approaches might bring some respite from the group's carnage. 

Scattered Spider is responsible for a number of significant, high-impact hacks that have left many victim organisations struggling to recover, sometimes for months. The group first achieved notoriety in 2023 for the hacks of Caesars Entertainment and MGM Resorts International. Since May this year the group is believed to have struck retailers in the UK and the US, insurance companies, and then airlines in quick succession. Overall, it's responsible for the compromise of hundreds of companies since 2022. It is financial cybercrime's apex predator. 

Its cybercrime activity is characterised by the use of highly effective social engineering to gain initial access to victims. This is followed up by brutally efficient post-compromise activities to steal data, deploy ransomware and cause mayhem in double-quick time.

More than one million users have installed browser extensions that turn their browsers into proxies for a web scraping botnet.

The extensions contain a library named Mellowtel that waits for users to go inactive, disables page security protections, and then loads a remote website inside a hidden iframe. The parsed/scraped website is then sent to a remote URL for analysis.

SecureAnnex found the Mellowtel library in 245 extensions for Chrome, Edge, and Firefox.