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In August 2025, Cisco Talos observed big-game hunting and double extortion attacks carried out by Kraken, a Russian-speaking group that has emerged from the remnants of the HelloKitty ransomware cartel.

### Summary _Short summary of the problem. Make the impact and severity as clear as possible. A flawed implementation of the Kubernetes aggregation layer's authentication flow could enable bypassing RBAC controls. ### Details _Give all details on the vulnerability. Pointing to the incriminated source code is very helpful for the maintainer._ It was discovered that the `virt-api` component fails to correctly authenticate the client when receiving API requests over mTLS. In particular, it fails to validate the CN (Common Name) field in the received client TLS certificates against the set of allowed values defined in the `extension-apiserver-authentication` configmap. The Kubernetes API server proxies received client requests through a component called aggregator (part of K8S's API server), and authenticates to the `virt-api` server using a certificate signed by the CA specified via the `--requestheader-client-ca-file` CLI flag. This CA bundle is primarily used in the context of aggr...

Doctor Web uncovers a targeted cyberattack on a Russian government body by the Cavalry Werewolf group using a new ShellNET backdoor and Telegram-based control.

Cybercrime has stopped being a problem of just the internet — it’s becoming a problem of the real world. Online scams now fund organized crime, hackers rent violence like a service, and even trusted apps or social platforms are turning into attack vectors. The result is a global system where every digital weakness can be turned into physical harm, economic loss, or political

The threat actor known as Curly COMrades has been observed exploiting virtualization technologies as a way to bypass security solutions and execute custom malware. According to a new report from Bitdefender, the adversary is said to have enabled the Hyper-V role on selected victim systems to deploy a minimalistic, Alpine Linux-based virtual machine. "This hidden environment, with its lightweight

Google on Wednesday said it discovered an unknown threat actor using an experimental Visual Basic Script (VB Script) malware dubbed PROMPTFLUX that interacts with its Gemini artificial intelligence (AI) model API to write its own source code for improved obfuscation and evasion. "PROMPTFLUX is written in VBScript and interacts with Gemini's API to request specific VBScript obfuscation and

Cisco Talos’ Vulnerability Discovery & Research team recently disclosed three vulnerabilities in Dell BSAFE, two in Fade In screenwriting software, and one in Trufflehog. The vulnerabilities mentioned in this blog post have been patched by their respective vendors, all in adherence to Cisco’s third-party vulnerability disclosure policy

Russia arrests developers of the notorious Meduza Stealer MaaS operation. Learn how the group's ‘fatal error’ led to the crackdown on domestic cybercrime.

The open-source command-and-control (C2) framework known as AdaptixC2 is being used by a growing number of threat actors, some of whom are related to Russian ransomware gangs. AdaptixC2 is an emerging extensible post-exploitation and adversarial emulation framework designed for penetration testing. While the server component is written in Golang, the GUI Client is written in C++ QT for

Silent Push wars of Russian hackers exploiting Adaptix, a pentesting tool built for Windows, Linux, and macOS, in ransomware campaigns.