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A previously undocumented threat actor dubbed GREYVIBE has been attributed to ongoing and persistent attacks targeting Ukraine and Ukraine-related entities since at least August 2025. GREYVIBE, per WithSecure, is assessed to be a Russian-speaking group operating broadly in the Russian time zone, with the activities aligning with Kremlin state interests, specifically when it comes to intelligence gathering efforts aimed at Ukraine in the context of the ongoing Russo-Ukrainian war. "The group has leveraged multiple attack vectors, including spear-phishing e-mails, fake captcha pages, and fraudulent Ukrainian adult club websites, to deliver malware to a diverse set of victims," WithSecure researcher Mohammad Kazem Hassan Nejad said in an analysis. "Across these campaigns, the group has relied on custom-developed obfuscators, loaders, and malware." The victimology footprint spans military, government, civilian, and business-related organizations. GREYVIBE, its ...

Cybersecurity researchers have discovered a malicious NuGet package that masquerades as a C# software development kit for Sicoob, one of Brazil's largest cooperative financial systems, to siphon client IDs and PFX certificates. According to Socket , versions 2.0.0 through 2.0.4 of " Sicoob.Sdk " contain functionality to exfiltrate sensitive information, including PFX certificates that are used to authenticate businesses with the Sicoob banking network in order to automate banking operations, such as processing instant payments and generating dynamic Pix QR codes. The package is estimated to have been downloaded nearly 500 times. "When a developer instantiates SicoobClient with a client ID, a PFX file path, and a PFX password, the package reads the PFX file from disk, Base64-encodes its contents, and sends the supplied client ID, PFX password, and encoded PFX data to a hardcoded third-party Sentry endpoint," security researcher Kirill Boychenko said. In ad...

The North Korean state-sponsored threat actor known as Kimsuky (aka Velvet Chollima) has been attributed to a fresh set of cyber attacks targeting South Korean military and corporate entities through March and April 2026. "Kimsuky employed a range of tailored social engineering tactics, such as spoofing security software installation pages and crafting a fake Webex meeting page that leveraged a legitimate meeting schedule," ENKI said in an analysis published this week. The attacks have been found to deliver a variant of a known malware family dubbed HTTPSpy by disguising it as installers from South Korean security software, a tactic the threat actor has consistently adopted since 2023. In the latest campaign observed in March 2026, the adversary has been found to propagate malicious payloads through a bogus web page impersonating the security software installation page of a South Korean B2B messaging service. Given the nature of the lure, it's suspected that...

Threat actors are continuing to exploit a critical, now-patched security flaw impacting FortiClient Endpoint Management Server (EMS) deployments to deliver credential-stealing malware. "The campaign abused trusted endpoint management infrastructure to deliver malware across managed endpoints," Arctic Wolf said . "Threat actors disguised the credential stealer payload as a Fortinet endpoint update, silently executing the malicious executable through PowerShell." The activity, observed by the cybersecurity company in May 2026, involves the exploitation of CVE-2026-35616 (CVSS score: 9.1), a critical pre-authentication API access bypass leading to privilege escalation. The issue was addressed by Fortinet in FortiClient EMS 7.4.7 and later. A successful compromise is followed by the threat actor taking steps to modify configurations to defer firmware upgrade reminders, as well as modifying a Remote Access Profile configuration and endpoint policy to insert a mal...

Every time you think the industry has finally stopped doing some reckless, low-effort crap, somebody spins up a fresh box full of sketchy loaders, fake installers, recycled social-engineering bait, and enough exposed infrastructure to make you wonder if prod is just a public beta now - meanwhile some researcher casually drops a technique that turns a "minor" foothold into total account compromise because apparently six digits and blind trust were all that stood between your vault and getting absolutely pwned. Cool. Great. Love that for us. Then there's the supply chain mess... signed binaries, poisoned updates, legit tooling getting hijacked like it's still 2017, plus a few reports this week that feel less like advanced tradecraft and more like watching skiddies discover low-hanging fruit with enterprise branding slapped on top. The weird part isn't that it works. The weird part is how damn easy it still is. Anyway. Grab caffeine. Let's get into it. ...

A new campaign orchestrated by a previously undocumented threat actor has targeted cryptocurrency organizations with an aim to facilitate digital asset theft using recruitment-themed social engineering and bespoke macOS malware. "These campaigns leveraged sophisticated social engineering techniques, custom macOS malware, and deep targeting of CI/CD infrastructure," Wiz researchers Shira Ayal, Eden Abergil, Andre Maccarone, Yuval Dan, and Benjamin Read said . "The used methods enabled the threat actor to move laterally from compromised employee laptops to code distribution systems and development infrastructure." The Google-owned cloud security company is tracking the activity under the moniker JINX-0164 . The threat actor is assessed to be active since at least mid-2025 and motivated by financial gain, targeting developers through recruitment-themed and other social engineering techniques to siphon cryptocurrencies. In at least one case, the adversary is said t...

Latin America and Europe become the target of two banking trojan campaigns that are designed to infect Windows and Android devices with Grandoreiro and BTMOB malware, respectively. That's according to new findings from WatchGuard and ESET, which have observed the two malware families being used to single out companies in Spain, Portugal, and Mexico, as well as mobile users in Brazil. The Grandoreiro campaign "uses the DLL Side-Loading technique abusing four different software, targeting banks in Portugal," WatchGuard researcher Euler Neto said . Active since 2016, Grandoreiro is an actively evolving banking malware that's capable of stealing credentials associated with thousands of financial institutions across 45 countries and territories. It's typically distributed via phishing emails, instructing recipients to click on sketchy links. Despite some arrests and attempts by Brazilian authorities to dismantle its infrastructure in early 2024, the malware h...

Cybersecurity researchers have discovered a new malicious package on the npm registry that comes with information stealing capabilities. According to OX Security, the package, named " mouse5212-super-formatter ," is designed to upload files from "/mnt/user-data," a dedicated directory used by Anthropic's Claude artificial intelligence (AI) tool to handle uploads and outputs in the background. The activity has been codenamed Malware-Slop . "By analyzing the malware, it turns out that the script presents itself as an internal 'archive deployment sync' utility that validates or initializes a GitHub repository, captures a lightweight 'network status' snapshot, and then performs a structured synchronization of local workspace files into a remote tracking tree," researchers Moshe Siman Tov Bustan and Nir Zadok said . In reality, however, it authenticates to GitHub during the postinstall stage, either using a GitHub access token found i...

CrowdStrike, in partnership with Google and the Shadowserver Foundation, has announced the simultaneous disruption of all command-and-control (C2) channels associated with GlassWorm , a persistent software chain campaign targeting software developers through malicious packages and extensions. "Since at least early 2025, GlassWorm operators have systematically targeted software developers, a population with access to source code repositories, cloud platforms, CI/CD pipelines, and package registries," CrowdStrike said . The development comes as developers have increasingly become lucrative targets for pulling off software supply chain attacks, enabling attackers to leverage a single compromised workstation to impact thousands of downstream organizations and users at once. GlassWorm, since its emergence last year, has conducted a "multi-pronged campaign" using trojanized VS Code extensions published on both the Microsoft VS Code Marketplace and Open VSX, ther...

Microsoft has warned of an active cryptojacking campaign that makes use of artificial intelligence (AI) chatbot interactions as a mechanism for surfacing malicious download sites. "This emerging delivery technique extends social engineering beyond conventional search results and increases the visibility of malicious software recommendations," Microsoft Defender Experts and the Microsoft Defender Security Research Team said in a report published Tuesday. The activity, per the tech giant, impersonates legitimate system utilities like CrystalDiskInfo, HWMonitor, Display Driver Uninstaller, FurMark, K-Lite Codec Pack, and PDFgear, likely in an attempt to target users who own high-performance GPUs. The idea is to focus on compromising systems with higher mining value than indiscriminately infecting a large number of machines, it added. The goals of the campaign are not merely financially motivated. The threat actors have also been found to establish persistent remote acce...

The Iranian hacking group known as MuddyWater has been linked to a new campaign affecting at least nine organizations across nine countries on four continents in the first quarter of 2026. The activity targeted industrial and electronics manufacturing, education and public-sector bodies, financial services, and professional services, per the Threat Hunter Team from Symantec and Carbon Black. Among the victims is a major South Korean electronics manufacturer, with the attackers spending a week inside its network in February 2026. Also singled as part of the sprawling espionage effort were an international airport in the Middle East, Southeast Asian industrial manufacturers, and a Latin American financial-services provider. "The attackers relied heavily on DLL side-loading using legitimately signed Fortemedia (fmapp.exe) and SentinelOne (sentinelmemoryscanner.exe) binaries to execute malicious DLLs while masquerading as benign software," Broadcom's cybersecurity t...

The Indian Computer Emergency Response Team (CERT-In) has issued new guidelines requiring organizations to patch critical security vulnerabilities in internet-exposed systems within 12 hours of being flagged where "feasible" to safeguard against potential threats stemming from threat actors' abuse of artificial intelligence (AI) tools and large language models (LLMs) to automate vulnerability discovery and exploitation, and enhance the scale and velocity of cyber attacks. "AI-assisted cyber exploitation reduces the time required for adversaries to identify, weaponize, and exploit vulnerabilities, exposed services, weak identities, insecure APIs, and misconfigured systems," CERT-In said in a 38-page blueprint published Monday. "As organizations become increasingly dependent on interconnected digital infrastructure, cloud ecosystems, software supply chains, operational technologies, and AI-enabled platforms, the potential impact of AI-enabled cyber thr...

The Iranian state-sponsored threat actor known as Nimbus Manticore (aka Screening Serpens and UNC1549 ) has been attributed to a fresh campaign using lures impersonating organizations in the aviation and software sectors across the U.S., Europe, and the Middle East following the joint U.S.-Israeli military campaign against the country in late February 2026. The activity, besides embracing previously undocumented techniques and enhanced capabilities, is characterized by the use of a new backdoor codenamed MiniFast (aka MiniUpdate) that appears to have been developed with assistance using artificial intelligence (AI), Check Point said in an analysis published last week. Affiliated with Iran's Islamic Revolutionary Guard Corps (IRGC), Nimbus Manticore is best known for targeting defense, aviation, and telecommunication sectors using career-themed phishing lures. These campaigns have also been codenamed the Iranian Dream Job, owing to tactical similarities with Operation Dream...

Monday recap. Same mess, new week. A sketchy dev tool got people pwned, old bugs came back from the dead, and security products somehow needed protecting from themselves. A bunch of companies spent the week checking old boxes and forgotten servers they should've patched years ago. Good times. Phishing crews are getting smarter too - less obvious scam junk, more targeted stuff that actually looks real. Meanwhile, botnets are grabbing anything exposed to the internet like it's free candy. The Internet's still a dumpster fire. Let’s get into it. ⚡ Threat of the Week GitHub Breached via Nx Console VS Code Extension —GitHub officially confirmed that the breach of its internal repositories was the result of a compromise of an employee device involving a poisoned version of the Nx Console Microsoft Visual Studio Code (VS Code) extension. The attack is said to have allowed the threat actor, a cybercriminal group known as TeamPCP, to exfiltrate about 3,800 repositories. G...

Threat actors are exploiting a recently disclosed critical security flaw in Ghost CMS to inject malicious JavaScript code with an aim to fuel ClickFix attacks. According to QiAnXin XLab, the activity involves the exploitation of CVE-2026-26980 (CVSS score: 9.4), an SQL injection vulnerability in Ghost's Content API that could allow an unauthenticated attacker to read arbitrary data from the database. The security flaw was addressed in February 2026 in version 6.19.1. The vulnerability was discovered by Anthropic using Claude. What makes the vulnerability severe is that it allows an attacker to gain access to a site's admin API key without permission, granting them the ability to poison the site by injecting malicious code. The admin API key can be used to invoke the admin API and can directly modify articles published on the content management system. The threat actor leveraged the security flaw to "obtain the target site's Admin API Key without authorizati...

Cybersecurity researchers have shed light on a cross-platform malware called RemotePE that has been put to use by the North Korea-linked Lazarus Group in attacks targeting financial and cryptocurrency organizations. RemotePE, per NCC Group subsidiary Fox-IT, is part of a multi-stage attack chain that involves two loaders tracked as DPAPILoader and RemotePELoader. "DPAPILoader decrypts and loads RemotePELoader from disk using the Windows Data Protection API ( DPAPI )," security researchers Yun Zheng Hu and Mick Koomen said . "RemotePELoader beacons to a C2 server and waits until it receives the next stage: RemotePE, a RAT executed entirely in memory and never written to disk, leaving no filesystem artifacts." RemotePE was first highlighted by the security vendor in September 2025 in connection with an attack targeting an unnamed organization in the decentralized finance (DeFi) sector, leading to the deployment of three malware families, including PondRAT, Th...

A new coordinated cross-ecosystem software supply chain attack campaign has targeted npm, PyPI, and Crates.io to distribute credential-stealing malware. The campaign, codenamed TrapDoor , spans more than 34 malicious packages across over 384 versions. The earliest activity was recorded on May 22, 2026, at 8:20 p.m. UTC, with new packages published to the ecosystems in waves from a cluster of accounts in quick succession. "TrapDoor targets developers in crypto, DeFi, Solana, and AI communities," Socket said. "The malicious packages are designed to steal developer secrets, crypto wallets, SSH keys, cloud credentials, browser data, and environment variables." "Several npm packages also deploy a shared payload, trap-core.js, that scans for credentials, validates AWS and GitHub tokens, attempts SSH-based lateral movement, and plants persistence through .cursorrules, CLAUDE.md, Git hooks, shell hooks, systemd, cron, and SSH." It's worth noting tha...

A new "coordinated" supply chain attack campaign has impacted eight packages on Packagist including malicious code designed to run a Linux binary retrieved from a GitHub Releases URL. "Although the affected packages were all Composer packages, the malicious code was not added to composer.json," Socket said . "Instead, it was inserted into package.json, targeting projects that ship JavaScript build tooling alongside PHP code." This "cross-ecosystem placement" makes the activity stand out because developers and security teams scanning PHP dependencies may only focus on Composer-related metadata, while skipping package.json lifecycle hooks that are bundled within the package. The malicious versions have since been removed from Packagist. An analysis of the packages has uncovered that their upstream repositories have been modified to include a postinstall script that attempts to download a Linux binary from a GitHub Releases URL ("github[...

Cybersecurity researchers have flagged a fresh software supply chain attack campaign that has targeted multiple PHP packages belonging to Laravel-Lang to deliver a comprehensive credential-stealing framework. The affected packages include - laravel-lang/lang laravel-lang/http-statuses laravel-lang/attributes laravel-lang/actions "The timing and pattern of the newly published tags point to a broader compromise of the Laravel Lang organization's release process, rather than a single malicious package version," Socket said . "The tags were published in rapid succession on May 22 and May 23, 2026, with many versions appearing only seconds apart." More than 700 versions associated with these packages have been identified, indicating automated mass tagging or republishing. It's suspected that the attacker may have managed to obtain access to organization-level credentials, repository automation, or release infrastructure. What makes the att...

The Belarus-aligned threat actor known as Ghostwriter (aka UAC-0057 and UNC1151) has been observed using lures related to Prometheus, a Ukrainian online learning platform, to target government organizations in the country. The activity, per the Computer Emergency Response Team of Ukraine (CERT-UA), involves sending phishing emails to government entities using compromised accounts. It's been active since the spring of 2026. "Typically, the email contains a PDF attachment with a link that, when clicked, leads to the download of a ZIP archive containing a JavaScript file," the agency said in a Thursday report. The JavaScript file, dubbed OYSTERFRESH, is designed to display a decoy document as a distraction mechanism, while stealthily writing an obfuscated and encrypted payload called OYSTERBLUES to the Windows Registry, as well as downloading and launching OYSTERSHUCK, which is responsible for decoding OYSTERBLUES.