Darkhotel APT attacks dated 2014 and earlier are characterized by the misuse of stolen certificates, the deployment of .hta files with multiple techniques, and the use of unusual methods like the infiltration of hotel Wi-Fi to place backdoors in targets’ systems. In 2015, many of these techniques and activities remain in use. However, in addition to new variants of malicious .hta, we find new victims, .rar attachments with RTLO spearphishing, and the deployment of a 0day from Hacking Team.
The Darkhotel APT continues to spearphish targets around the world, with a wider geographic reach than its previous botnet buildout and hotel Wi-Fi attacks. Some of the targets are diplomatic or have strategic commercial interests.