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As the field of artificial intelligence (AI) continues to evolve at a rapid pace, new research has found how techniques that render the Model Context Protocol ( MCP ) susceptible to prompt injection attacks could be used to develop security tooling or identify malicious tools, according to a new report from Tenable. MCP, launched by Anthropic in November 2024, is a framework designed to connect Large Language Models (LLMs) with external data sources and services, and make use of model-controlled tools to interact with those systems to enhance the accuracy, relevance, and utility of AI applications. It follows a client-server architecture, allowing hosts with MCP clients such as Claude Desktop or Cursor to communicate with different MCP servers, each of which exposes specific tools and capabilities. While the open standard offers a unified interface to access various data sources and even switch between LLM providers, they also come with a new set of risks, ranging from excess...

In what has been described as an "extremely sophisticated phishing attack," threat actors have leveraged an uncommon approach that allowed bogus emails to be sent via Google's infrastructure and redirect message recipients to fraudulent sites that harvest their credentials. "The first thing to note is that this is a valid, signed email – it really was sent from no-reply@google.com," Nick Johnson, the lead developer of the Ethereum Name Service (ENS), said in a series of posts on X. "It passes the DKIM signature check, and Gmail displays it without any warnings – it even puts it in the same conversation as other, legitimate security alerts." The email message informs prospective targets of a subpoena from a law enforcement authority asking for unspecified content present in their Google Account and urges them to click on a sites.google[.]com URL in order to "examine the case materials or take measures to submit a protest." The Google Si...

Can a harmless click really lead to a full-blown cyberattack? Surprisingly, yes — and that's exactly what we saw in last week's activity. Hackers are getting better at hiding inside everyday actions: opening a file, running a project, or logging in like normal. No loud alerts. No obvious red flags. Just quiet entry through small gaps — like a misconfigured pipeline, a trusted browser feature, or reused login tokens. These aren't just tech issues — they're habits being exploited. Let's walk through the biggest updates from the week and what they mean for your security. ⚡ Threat of the Week Recently Patched Windows Flaw Comes Under Active Exploitation — A recently patched security flaw affecting Windows NTLM has been exploited by malicious actors to leak NTLM hashes or user passwords and infiltrate systems since March 19, 2025. The flaw, CVE-2025-24054 (CVSS score: 6.5), is a hash disclosure spoofing bug that was fixed by Microsoft last month as part of its Patch Tuesday updates...

A new multi-stage attack has been observed delivering malware families like Agent Tesla variants, Remcos RAT, and XLoader. "Attackers increasingly rely on such complex delivery mechanisms to evade detection, bypass traditional sandboxes, and ensure successful payload delivery and execution," Palo Alto Networks Unit 42 researcher Saqib Khanzada said in a technical write-up of the campaign. The starting point of the attack is a deceptive email that poses as an order request to deliver a malicious 7-zip archive attachment, which contains a JavaScript encoded (.JSE) file. The phishing email, observed in December 2024, falsely claimed that a payment had been made and urged the recipient to review an attached order file. Launching the JavaScript payload triggers the infection sequence, with the file acting as a downloader for a PowerShell script from an external server. The script, in turn, houses a Base64-encoded payload that's subsequently deciphered, written to the Wi...

Threat actors are leveraging an artificial intelligence (AI) powered presentation platform named Gamma in phishing attacks to direct unsuspecting users to spoofed Microsoft login pages. "Attackers weaponize Gamma, a relatively new AI-based presentation tool, to deliver a link to a fraudulent Microsoft SharePoint login portal," Abnormal Security researchers Callie Hinman Baron and Piotr Wojtyla said in a Tuesday analysis. The attack chain commences with a phishing email, in some cases sent from legitimate, compromised email accounts, to entice message recipients into opening an embedded PDF document. In reality, the PDF attachment is nothing but a hyperlink that, when clicked, redirects the victim to a presentation hosted on Gamma that prompts them to click on a button to "Review Secure Documents." Doing so takes the user to an intermediate page that impersonates Microsoft and instructs them to complete a Cloudflare Turnstile verification step before accessing...

Cybersecurity researchers are calling attention to a new type of credential phishing scheme that ensures that the stolen information is associated with valid online accounts. The technique has been codenamed precision-validating phishing by Cofense, which it said employs real-time email validation so that only a select set of high-value targets are served the fake login screens. "This tactic not only gives the threat actors a higher success rate on obtaining usable credentials as they only engage with a specific pre-harvested list of valid email accounts," the company said . Unlike "spray-and-pray" credential harvesting campaigns that typically involve the bulk distribution of spam emails to obtain victims' login information in an indiscriminate fashion, the latest attack tactic takes spear-phishing to the next level by only engaging with email addresses that attackers have verified as active, legitimate, and high-value. In this scenario, the email address...

Microsoft is warning of several phishing campaigns that are leveraging tax-related themes to deploy malware and steal credentials. "These campaigns notably use redirection methods such as URL shorteners and QR codes contained in malicious attachments and abuse legitimate services like file-hosting services and business profile pages to avoid detection," Microsoft said in a report shared with The Hacker News. A notable aspect of these campaigns is that they lead to phishing pages that are delivered via a phishing-as-a-service (PhaaS) platform codenamed RaccoonO365 , an e-crime platform that first came to light in early December 2024. Also delivered are remote access trojans (RATs) like Remcos RAT, as well as other malware and post-exploitation frameworks such as Latrodectus , AHKBot, GuLoader , and BruteRatel C4 (BRc4). One such campaign spotted by the tech giant on February 6, 2025, is estimated to have sent hundreds of emails targeting the United States ahead of the t...

The financially motivated threat actor known as FIN7 has been linked to a Python-based backdoor called Anubis (not to be confused with an Android banking trojan of the same name) that can grant them remote access to compromised Windows systems. "This malware allows attackers to execute remote shell commands and other system operations, giving them full control over an infected machine," Swiss cybersecurity company PRODAFT said in a technical report of the malware. FIN7, also called Carbon Spider, ELBRUS, Gold Niagara, Sangria Tempest, and Savage Ladybug, is a Russian cybercrime group known for its ever-evolving and expanding set of malware families for obtaining initial access and data exfiltration. In recent years, the threat actor is said to have transitioned to a ransomware affiliate. In July 2024, the group was observed using various online aliases to advertise a tool called AuKill (aka AvNeutralizer) that's capable of terminating security tools in a likely ...

On the 21st birthday of Gmail , Google has announced a major update that allows enterprise users to send end-to-end encrypted (E2EE) to any user in any email inbox in a few clicks. The feature is rolling out starting today in beta, allowing users to send E2EE emails to Gmail users within an organization, with plans to send E2EE emails to any Gmail inbox in the coming weeks and to any email inbox later this year. What makes the new encryption model – an alternative to the Secure/Multipurpose Internet Mail Extensions ( S/MIME ) protocol – stand out is that it eliminates the need for senders or recipients to use custom software or exchange encryption certificates. "This capability, requiring minimal efforts for both IT teams and end users, abstracts away the traditional IT complexity and substandard user experiences of existing solutions, while preserving enhanced data sovereignty, privacy, and security controls," Google Workspace's Johney Burke and Julien Duplant said...