Casbaneiro

Casbaneiro Banking Trojan Targets Financial Institutions in Argentina, Peru, Colombia and Mexico

Fortinet researchers identified a Casbaneiro campaign in August that specifically targets bank customers across four Latin American countries. The infection begins with a PDF attachment that displays the recipient's own email address to build credibility and creates urgency around an unpaid invoice or judicial notice. The PDF link performs IP-based geofencing, redirecting non-target visitors to Google or YouTube while delivering a Base64-encoded ZIP only to victims in the selected countries. Inside the archive, an HTA file downloads the legitimate AutoIt interpreter along with a compiled script and compressed payload, helping evade binary-focused defenses. The malware stays dormant until the victim visits a monitored banking website, at which point it activates its C2 channel, exfiltrates Outlook contact data, and can display bank-specific credential-harvesting overlays. Additional remote-access capabilities allow operators to control the keyboard, manipulate the clipboard, and execute arbitrary commands on the infected system.