In a Monday disclosure, security researchers at cybersecurity firm Kaspersky Lab said that they have identified a complex malware called ‘ProjectSauron’ which has been targeting governmental organizations since at least June 2011, but remained undetected.

The ProjectSauron malicious software identified by the Kaspersky Lab security researchers in September 2015 is a highly sophisticated cyber-espionage platform which has also been recently reported by security firm Symantec. The researchers at Symantec have dubbed the malware as ‘Strider.’

Revealing that the ProjectSauron malware has been secretly operational since June 2011 and remained active until April 2016, Kaspersky Lab researchers said that the malware has stealthily been used by cyber-espionage group to target state organizations in Russia, Rwanda, Iran, and Italian-speaking nations.

According to the details shared by Kaspersky Lab researchers, more than 30 organizations have been found to be hit by the ProjectSauron malware in the four mentioned countries. The researchers also added alongside that “many more organizations and geographies are likely to be affected.”

About the ProjectSauron malware, Kaspersky Lab researchers said that the malware has been designed for carrying out “long-term campaigns through stealthy survival mechanisms;” and added that the malware even has the capability to steal data from computers which are not connected to the Internet, harnessing USB drives on which stolen data is stored in an area which cannot be detected by the affected computer’s operating system.