X-AGENTX-Agent

APT28's second-stage persistent macOS backdoor. This backdoor component is known to have a modular structure featuring various espionage functionalities, such as key-logging, screen grabbing and file exfiltration. This component is available for Osx, Windows, Linux and iOS operating systems. Xagent is a modular backdoor with spying functionalities such as keystroke logging and file exfiltration. Xagent is the group’s flagship backdoor and heavily used in their operations. Early versions for Linux and Windows were seen years ago, then in 2015 an iOS version came out. One year later, an Android version was discovered and finally, in the beginning of 2017, an Xagent sample for OS X was described.