overlay functionality

Massiv is an Android banking Trojan that disguises itself as legitimate applications, primarily targeting users in southern Europe. It is distributed through side-loading and is capable of remote control over infected devices, enabling Device Takeover attacks that can lead to unauthorized banking transactions. Massiv often masquerades as IPTV applications to attract users seeking online television services. The malware employs overlay functionality to create deceptive screens, keylogging to capture sensitive information, and SMS/Push message interception. It can monitor applications on infected devices and present fake overlays to prompt users for sensitive data. Notably, it has targeted the Portuguese government application gov.pt and connects with Chave Móvel Digital, a digital authentication system, to access victims' banking accounts. Once it captures sensitive data, Massiv allows operators remote access to the device using Android’s AccessibilityService, facilitating real-time observation and manipulation of the user interface. It communicates over a WebSocket channel and supports screen streaming and UI-tree modes for enhanced control. Massiv's distribution includes malware droppers that initially do not contain malicious code but open a WebView to an IPTV website while the actual malware operates in the background. This tactic has increased in recent months, particularly in Spain, Portugal, France, and Turkey. Indicators of compromise include specific SHA-256 hashes and package names associated with the malware. The bot commands allow operators to perform various actions on the infected device, such as clicking coordinates, installing APKs, and showing overlays.