Palo Alto's Unit 42 found a new macOS campaign that uses the ClickFix trick, a fake CAPTCHA or verification page, to get users to paste a command into Terminal. The command quietly downloads a disk image, mounts it without showing it in Finder, finds the app inside, and launches it, installing the Atomic macOS Stealer (AMOS). The malware then shows a fake system password prompt and steals browser credentials and cookies from many Chromium and Firefox-based browsers, cryptocurrency wallet data, Keychain contents, messaging app data, and documents. The single-command approach is stealthier than older campaigns that relied on the victim manually opening a downloaded image.
Elastic Security Labs detailed OXLOADER, a previously undocumented Windows loader that reaches victims through malicious Google Ads impersonating the Node.js download page and other developer tools. A developer searching for Node.js clicks a sponsored result, lands on a convincing fake site, and runs a script that quietly installs the loader, which then deploys an in-memory infostealer called CastleStealer to harvest credentials and other data. OXLOADER is heavily obfuscated, runs several anti-analysis checks, and skips machines set to Russian or in Russian-aligned regions, pointing to a financially motivated Russian-speaking operator. Google removed the advertiser account, but the technique of buying ads against developer searches remains widespread.
Cybernews researchers found an unprotected Elasticsearch database holding 24 billion records and over 8 terabytes of data, most of it infostealer logs: stolen usernames, passwords, and the services they unlock. The collection also pulls from Telegram channels and older breach dumps. Oddly, it included thousands of records tracking CVE vulnerabilities, breach news articles, and social-media posts about cyber incidents, with content as recent as 2026, suggesting the owner is actively curating and refreshing the stash with new leaks. The researchers could not determine how many records are duplicates, how old the data is, or who owns it.
Attackers hijacked the npm account of a former contributor to Mastra, a popular open-source framework for building AI applications, and in an 88-minute automated burst republished 144 packages under the @mastra scope with a hidden malicious dependency. The poisoned dependency, a fake clone of a date library, runs at install time: it disables TLS checks, downloads a second-stage cryptocurrency-stealing trojan, runs it as a detached process, and deletes itself. Because @mastra/core alone sees over 900,000 weekly downloads and the payload fires on install, anyone who installed an affected version since June 16 could be compromised before importing anything. npm has pulled the malicious versions.
The North Korean campaign known as Contagious Interview is still expanding its assault on software developers, now leaning on poisoned developer tools and fake job offers. Researchers at Proofpoint and Expel describe obfuscated malicious npm packages, published from throwaway accounts, that install the OtterCookie infostealer through a post-install script, alongside recruitment and code-review phishing lures. The group is using generative AI to build its malware loaders and to set up fake companies and LinkedIn profiles for social engineering. Expel says the operation stole $12 million in cryptocurrency in the first three months of 2026, draining more than 26,000 wallets from over 2,700 infected developer machines.
Breach-tracking service Have I Been Pwned has added a fresh batch of stealer logs covering 56,278,397 accounts, harvested by infostealer malware from infected computers. Unlike a single company breach, stealer logs are credentials and session data scraped directly from victims' devices, often capturing the exact website-and-password pairs a person types, plus browser cookies that can let attackers skip login entirely. Because the data comes from malware on individual machines, exposure cuts across countless unrelated services. The scale is a reminder that infostealer infections, frequently spread through cracked software, malicious ads, and fake downloads, remain one of the biggest sources of credential theft.
Attackers hijacked more than 400 packages in the Arch User Repository (AUR), the community add-on store for Arch Linux, in a supply-chain attack dubbed Atomic Arch. Rather than exploiting a flaw, they adopted abandoned packages and quietly edited the build recipe (PKGBUILD) to pull in a malicious npm package, atomic-lockfile, at install time. The payload is a Rust credential stealer that grabs browser logins, SSH keys, crypto wallets, and developer tokens; when run as root it also loads an eBPF rootkit that hides its processes, files, and network connections. Only the AUR is affected, not Arch's official repositories. The package names and histories looked completely normal.
Researchers at BlackFog have detailed OnyxC2, a new malware-as-a-service sold on cybercrime forums that packages professional-grade data theft for as little as $250 a month, with a $500 premium tier adding hidden-desktop control and a $6,000 buyout option. It ships with a polished control panel and ready-made lures disguised as FinePrint, Windows Settings, a fake Windows update, and a game installer. Its payloads slipped past VirusTotal scanning when first uploaded and were still undetected weeks later, and builds use AES-256 encryption. The low price and turnkey design lower the barrier for less-skilled criminals to run capable infostealing campaigns.
McAfee has detailed WeedHack, a malware-as-a-service infostealer campaign that has infected more than 116,000 systems since January by targeting Minecraft players. The malware spreads through malicious Minecraft mods, clients, cheats, and utilities promoted via YouTube videos (some with voice-over narration and thousands of views) and SEO poisoning of keywords matching popular clients like Meteor, Wurst, LiquidBounce, and Impact. WeedHack averages 2,000-3,000 infections daily, mostly in the US, Germany, India, and the UK, across 240+ distribution URLs and 3,820 unique malicious JAR files. It offers customers a dashboard to view stolen credentials and victim data. Some fake sites even link to legitimate GitHub repos to fabricate credibility.
Ukrainian cyberpolice working with US law enforcement have identified an 18-year-old man from Odesa as the suspected operator of an infostealer operation that ran from 2024 through 2025 against customers of a California online retailer. The malware harvested 28,000 customer accounts; the operators used about 5,800 of them to make $721,000 in unauthorized purchases, leaving the retailer with around $250,000 in direct losses including chargebacks. The suspect ran the back-end infrastructure for processing and selling stolen session tokens. Police searched two residences and seized computers, phones, and bank cards. No arrest has been announced yet.
TrustStrike Labs