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AllaSenha is a Brazilian banking malware lineage associated with credential theft and fraudulent online-banking activity against users in Brazil. It is linked to a family of banking remote-access trojans that evolved into later variants including CarnavalHeist and NFe-RAT. The lineage uses multi-stage infection chains centered on phishing themes tied to Brazilian electronic tax invoice workflows, abuse of Windows search-ms and WebDAV for payload delivery, embedded Python components, and fileless reflective DLL injection of Delphi-based banking trojans. Operational capabilities associated with this lineage include bank-specific credential theft through overlays targeting numerous Brazilian financial institutions, remote control of infected systems, keylogging, screen capture, and mechanisms to interfere with remote assistance or incident response. Observed tradecraft also includes persistence via user-run startup mechanisms, anti-analysis checks, and in-memory execution to reduce on-disk artifacts. The malware supports fraud involving Brazil's PIX instant-payment ecosystem, including QR-code capture and transaction facilitation. Available evidence supports attribution of this activity to a Brazil-based cybercriminal operator rather than a state actor. The actor's activity is consistent with financially motivated banking fraud focused on Brazilian victims, including possible exposure of organizations in sectors such as health care where infected endpoints may also create secondary data-risk concerns. Known related names in this lineage include CarnavalHeist and NFe-RAT.
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