CybersecurityThe “Mask": Kaspersky Lab discovers advanced global cyber-espionage operation

Published 12 February 2014

Kaspersky Lab’s security researchers have announced the discovery of the Mask (aka Careto), an advanced Spanish-language speaking threat actor that has been involved in global cyber-espionage operations since at least 2007. What makes the Mask special is the complexity of the toolset used by the attackers. This includes a sophisticated malware, a rootkit, a bootkit, Mac OS X and Linux versions, and possibly versions for Android and iOS (iPad/iPhone). The primary targets are government institutions, diplomatic offices and embassies, energy, oil, and gas companies, research organizations and activists. Victims of this targeted attack have been found in thirty-one countries around the world.

Kaspersky Lab’s security researchers have announced the discovery of the Mask (aka Careto), an advanced Spanish-language speaking threat actor that has been involved in global cyber-espionage operations since at least 2007. What makes the Mask special is the complexity of the toolset used by the attackers. This includes a sophisticated malware, a rootkit, a bootkit, Mac OS X and Linux versions, and possibly versions for Android and iOS (iPad/iPhone).

The primary targets are government institutions, diplomatic offices and embassies, energy, oil, and gas companies, research organizations and activists. Victims of this targeted attack have been found in thirty-one countries around the world — from the Middle East and Europe to Africa and the Americas. 

The main objective of the attackers is to gather sensitive data from the infected systems. These include office documents, but also various encryption keys, VPN configurations, SSH keys (serving as a means of identifying a user to an SSH server), and RDP files (used by the Remote Desktop Client to automatically open a connection to the reserved computer).

Several reasons make us believe this could be a nation-state sponsored campaign. First of all, we observed a very high degree of professionalism in the operational procedures of the group behind this attack. From infrastructure management, shutdown of the operation, avoiding curious eyes through access rules to using wiping instead of deletion of log files. These combine to put this APT ahead of Duqu in terms of sophistication, making it one of the most advanced threats at the moment,” said Costin Raiu, Director of the Global Research and Analysis Team (GReAT) at Kaspersky Lab. “This level of operational security is not normal for cyber-criminal groups.”

Kaspersky Lab researchers initially became aware of Careto last year when they observed attempts to exploit a vulnerability in the company’s products which was fixed five years ago. The exploit provided the malware the capability to avoid detection. This situation raised their interest and this is how the investigation started.

For the victims, an infection with Careto can be disastrous. Careto intercepts all communication channels and collects the most vital information from the victim’s machine. Detection is extremely difficult because of stealth rootkit capabilities, built-in functionalities and additional cyber-espionage modules.