MacSync under the microscope: new delivery methods and a new payload

MacSync is a relatively young, rapidly evolving family of crypto/info stealers. First advertised on the dark web in 2025 as Mac.c, the stealer was later renamed to MacSync by its creators. The initial versions were implemented as AppleScripts and closely resembled the AMOS stealer family, but ove...

Microsoft Links 30+ Rotating Domains to MacSync Stealer Infrastructure

Microsoft Defender Experts have linked more than 30 web domains to MacSync Stealer, a macOS-focused information stealer, after correlating recurring endpoint and network behaviors across changing infrastructure, tracing the malware from payload retrieval through data collection, staging, and...

Hunting MacSync Stealer infrastructure through behavioral pivots

In this article 1. Activity overview 2. Discovery of additional rotating infrastructure 3. Attack chain overview 4. Mitigation and protection guidance 5. References 6. Learn more MacSync Stealer is a macOS-focused information stealer that relies on changing infrastructure to deliver payloads,...

Hunting MacSync Stealer infrastructure through behavioral pivots

In this article 1. Activity overview 2. Discovery of additional rotating infrastructure 3. Attack chain overview 4. Mitigation and protection guidance 5. References 6. Learn more MacSync Stealer is a macOS-focused information stealer that relies on changing infrastructure to deliver payloads,...

Over 250 ClickFix Domains Use Browser Fingerprinting to Hide macOS Malware Lures

A macOS ClickFix operation spanning more than 250 front-end domains now fingerprints visitors before deciding whether to show them a malware lure, a change Microsoft Threat Intelligence tracked on infrastructure it had been watching for weeks. The server-side gate hides the malicious page from...

From open lures to cloaked gates: How a macOS ClickFix campaign learned to hide

In this article 1. Activity overview 2. How ClickFix works 3. Campaign overview 4. ClickFix moved from open pages to fingerprinting gates 5. The fingerprinting gate 6. Mitigation and protection guidance 7. Indicators of compromise IOC 8. References 9. Learn more Microsoft Threat Intelligence...

ClickFix campaign uses fake macOS utilities lures to deliver infostealers

In this article 1. Activity overview 2. Mitigation and protection guidance 3. Hunting queries 4. Indicators of compromise Microsoft researchers continue to observe the evolution of an infostealer campaign distributing ClickFix‑style instructions and targeting macOS users. In this recent iteration...

ClickFix Attack Targets Devs with MacSync Malware via Fake Claude Tools

Cybersecurity researchers at 7AI have revealed a new Claude Fraud campaign in which hackers use fake AI extensions and Google ads to steal data from tech professionals...

ClickFix Campaigns Spread MacSync macOS Infostealer via Fake AI Tool Installers

Three different ClickFix campaigns have been found to act as a delivery vector for the deployment of a macOS information stealer called MacSync. "Unlike traditional exploit-based attacks, this method relies entirely on user interaction – usually in the form of copying and executing commands –...

Google Ads and Claude AI Abused to Spread MacSync Malware via ClickFix

Cybersecurity experts at Moonlock Lab have discovered a new ClickFix attack. Hackers are using hijacked Google Ads and fake Claude AI guides to trick Mac users into installing the data-stealing MacSync malware...

New MacSync Stealer Disguised as Trusted Mac App Hunts Saved Passwords

Jamf security experts have found a new version of MacSync Stealer. Disguised as a zk-call app, it uses official notarization to bypass security and steal your saved passwords...