The application, titled HighRise, allowed the CIA to snoop on Android devices.
Naked Security explains:
Since launching its Vault 7 project in March, WikiLeaks has dumped documents outlining the CIA’s efforts to exploit Microsoft and Apple technology. In this week’s latest release, it focuses on malware called HighRise, which the agency used to target Android devices.
WikiLeaks describes HighRise this way on its website:
HighRise is an Android application designed for mobile devices running Android 4.0 to 4.3. It provides a redirector function for SMS messaging that could be used by a number of IOC tools that use SMS messages for communication between implants and listening posts. HighRise acts as a SMS proxy that provides greater separation between devices in the field (“targets”) and the listening post (LP) by proxying “incoming” and “outgoing” SMS messages to an internet LP. Highrise provides a communications channel between the HighRise field operator and the LP with a TLS/SSL secured internet communication.