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Cyber Stealer is a stealer malware family identified in May 2025. It is characterized as a feature-rich information-stealing threat focused on harvesting sensitive user and system data. Available reporting supports credential theft as its primary observed capability. No high-confidence attribution to a specific threat actor, country of origin, campaign cluster, or state sponsor is currently available. Publicly available information in this context also does not establish specific victim geographies, industry targeting, or ransomware/extortion activity associated with Cyber Stealer.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Cyber Stealer is a new stealer malware first identified in May 2025, notable for its feature-rich design.
Cyber Stealer is a newly identified malware family focused on stealing information, with rapid feature development driven by competitive pressures among malware developers.
Cyber Stealer is a new stealer malware first identified in May 2025, notable for its feature-rich design.
Cyber Stealer is a newly identified malware family focused on stealing information, with rapid feature development driven by competitive pressures among malware developers.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.