Xloader

Internal ID: osx.xloader

aliases

Last seen:Mar 17, 2026

Intelligence Profile

Xloader is a Rebranding of Formbook malware (mainly a stealer), available for macOS as well.

Formbook has a "magic"-value FBNG (FormBook-NG), while Xloader has a "magic"-value XLNG (XLoader-NG). This "magic"-value XLNG is platform-independent.

Not to be confused with apk.xloader or ios.xloader.

Threat Analysis

Xloader is a malware family tracked by threat intelligence researchers and catalogued in the Malpedia dataset. It represents a distinct malicious software lineage with identifiable code characteristics, behaviors, and victimology.

External References

→https://blog.malwarebytes.com/mac/2021/07/osx-xloader-hides-little-except-its-main-purpose-what-we-learned-in-the-installation-process/

→https://blogs.blackberry.com/en/2021/09/threat-thursday-xloader-infostealer

→https://cip.gov.ua/en/news/khto-stoyit-za-kiberatakami-na-ukrayinsku-kritichnu-informaciinu-infrastrukturu-statistika-15-22-bereznya

→https://malwarebookreports.com/cross-platform-java-dropper-snake-and-xloader-mac-version/

→https://medium.com/@shaddy43/layers-of-deception-analyzing-the-complex-stages-of-xloader-4-3-malware-evolution-2dcb550b98d9

→https://research.checkpoint.com/2021/time-proven-tricks-in-a-new-environment-the-macos-evolution-of-formbook/

→https://research.checkpoint.com/2021/top-prevalent-malware-with-a-thousand-campaigns-migrates-to-macos/

→https://research.checkpoint.com/2022/xloader-botnet-find-me-if-you-can/

→https://sublime.security/blog/xloader-deep-dive-link-based-malware-delivery-via-sharepoint-impersonation/

→https://twitter.com/krabsonsecurity/status/1319463908952969216

Quick Facts

TypeMalware Family

Aliases1

Also Known As

osx.xloader

Research Links

MITRE ATT&CK VirusTotal Google (news) Twitter/X search

Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.

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