Alfonso Stealer

aliases

Last seen:Mar 17, 2026

Intelligence Profile

Malware family tracked by Malpedia. ID: win.alfonso_stealer

Threat Analysis

Alfonso Stealer is a known-sophistication threat actor of undetermined national origin, engaged in cyber operations with a primary motivation of unknown activity patterns.

External References

→https://twitter.com/3xp0rtblog/status/1344352253294104576

→https://www.cloudsek.com/blog/threat-actors-abuse-ai-generated-youtube-videos-to-spread-stealer-malware

Quick Facts

TypeAPT / Threat Group

Aliases2

Also Known As

Alfonso Stealerwin.alfonso_stealer

External Intelligence

Malpedia: win.alfonso_stealer

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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