Threats tagged 'atomic stealer'

In this article Activity overview How ClickFix works Campaign overview ClickFix moved from open pages to fingerprinting gates The fingerprinting gate Mitigation and protection guidance Indicators of compromise (IOC) References Learn more Microsoft Threat Intelligence observed a macOS ClickFix campaign distributing infostealers, including MacSync and Atomic Stealer (AMOS) , through a large cluster of look-alike domains. The campaign evolved from broadly serving ClickFix lures to using a server-side browser-fingerprinting gate that shows the lure primarily to visitors whose environment appears consistent with a genuine macOS browser. This cloaking limits visibility for crawlers, sandboxes, and some automated analysis workflows. The blog details the domain pattern, fingerprinting checks, infection chain, detection coverage, and hunting pivots that defenders can use to identify related activity. Activity overview Microsoft Threat Intelligence has been tracking a macOS ClickFix operation that distributes information-stealing malware through a large family of algorithmically named domains. Over several weeks of monitoring, Microsoft observed a notable shift in tradecraft: the same infrastructure moved from openly serving the malicious command in the served page’s HTML source to concealing the lure behind a server-side fingerprinting gate that reveals the payload only to visitors the server assesses as a genuine macOS target. The chain ultimately delivers information stealers such as MacSync or Atomic Stealer (AMOS). This activity is consistent with the broader shift in macOS ClickFix tradecraft that Microsoft Threat Intelligence previously documented , in which threat actors instruct users to run Terminal commands that retrieve remotely hosted content rather than the traditional approach of delivering a disk image for manual installation. The cluster described here is notable for two reasons: its domains are mass-produced by a recognizable name generator, and it adopted server-side cloaking on existing infrastructure, giving defenders a clear before-and-after view of the same operation. In this blog, we describe the campaign’s domain-generation pattern, the two delivery phases we observed, the fingerprinting gate that now fronts the infrastructure, and the end-to-end infection chain. We also provide hunting guidance, mitigation recommendations, and defanged indicators of compromise. How ClickFix works ClickFix is a social-engineering technique where attackers persuade users to copy and run a command in Terminal instead of downloading a traditional macOS application. The lure usually appears as a fake verification step, software update, download error, or CAPTCHA, with the command disguised as something required to complete the action. Because execution starts from a user-run Terminal command rather than a downloaded app bundle, the flow can avoid parts of the normal macOS application trust path, including quarantine handling, code-signing evaluation, and notarization checks typically applied to downloaded applications. In this campaign, ClickFix remains the delivery mechanism, but the important change is that the lure is no longer shown to every visitor. The page first profiles the visitor through a browser-fingerprinting gate and primarily requests consistent with a genuine macOS browser environment receive the fake “Download for macOS” page and copied Terminal command. Figure 1a – The counterfeit “Download for macOS” page served to a qualifying visitor by a cloaked gate (apricotfilepoint[.]com). The page displays a forged “Verified Publisher” badge and offers a one-click Copy of an obfuscated curl one-liner. Delivery is conditional. During analysis, the same URLs returned different content to different requests. In some case the macOS ClickFix lure, and in others an apparently benign decoy page. In our testing, a request presenting a Windows browser received a decoy page such as a fake browser-extension or VPN landing page (Figure…

A new modular macOS information stealer named ClickLock Stealer has been discovered targeting users primarily in Europe, North America, and the Middle East. The malware is likely distributed via ClickFix social engineering pages that trick victims into pasting malicious commands into Terminal. Once executed, it deploys four components: a credential stealer, a Keychain stealer targeting Chrome's encryption key, a comprehensive crypto wallet harvester, and a persistent GSocket-based backdoor. The malware employs an aggressive 'locker' technique, killing all visible applications except password dialogs to force user compliance. It targets data from eight browsers, 31 crypto wallet extensions, seven password managers, desktop wallets, macOS Keychain, and shell history. The campaign has compromised at least 100 victims across 33 countries since May 2026, using compromised WordPress domains and Telegram for command and control and exfiltration.

A deceptive website impersonating CleanMyMac tricks users into installing SHub Stealer, a sophisticated macOS malware. The malware steals sensitive data, including passwords, browser data, cryptocurrency wallets, and Telegram sessions. It can also modify wallet apps to steal recovery phrases. The attack begins with users pasting a command into Terminal, which downloads and executes a malicious script. The malware performs extensive data collection from various browsers and wallet applications, and installs persistent backdoors in certain crypto wallet apps. SHub Stealer is part of a growing family of AppleScript-based macOS infostealers, demonstrating increasing sophistication in targeting Mac users.

Malware#browser data theft#clickfixUnited States+9

An ongoing social engineering campaign is targeting cryptocurrency users through fake startup companies impersonating AI, gaming, and Web3 firms. The scammers create elaborate facades using spoofed social media accounts and project documentation on platforms like Notion and GitHub. They contact victims offering to pay them to test software, which is actually malware designed to steal crypto wallet contents. The campaign uses both Windows and macOS malware, including information stealers like Atomic Stealer. The threat actors go to great lengths to appear legitimate, even creating fake conference photos and merchandise stores. Multiple fake company identities have been identified as part of this campaign.

Malware#impersonation#social engineeringUnited Kingdom+6