APIs

Security researchers at Zimperium have identified a new strain of Android malware called RatHat, which is linked to threat actors from China and is designed to steal sensitive credentials and banking information. RatHat infiltrates devices through phishing sites, malvertising, and SMS phishing (smishing), tricking users into downloading malicious Android package kits (APKs). The malware uses a dropper to activate its payload, which is hidden in encrypted assets, and employs techniques to bypass Android's security measures. RatHat consists of three main components: a malicious Android application, a Go agent (liblocal-service.so), and an FRP client (libmedia_codec.so). The app collects sensitive information such as banking credentials, notifications, 2FA codes, OTP keys, and screen inputs. It features a generative AI user interface-automation engine that communicates in Mandarin and can perform various tasks like determining screen coordinates and issuing navigation commands. The Go agent acts as a command-and-control executor, executing commands to bypass app-level security and manage system-level tasks. The FRP client maintains a secure reverse tunnel to the attacker's server, allowing ongoing remote access to the device. The architecture of RatHat demonstrates the inadequacy of traditional mobile security measures against such advanced threats.