X-Agent or XAgent is a spyware and malware program designed to collect and transmit hacked files from machines running Windows, Linux, iOS, or Android, to servers operated by hackers. It employs phishing attacks and the program is designed to "hop" from device to device. In 2016, CrowdStrike identified an Android variant of the malware for the first time, and claimed that the malware targeted members of the Ukrainian military by distributing an infected version of an app to control D-30 Howitzer artillery. The Ukrainian army denied CrowdStrike's report and stated that losses of Howitzer artillery pieces had "nothing to do with the stated cause".