Experts from ESET have detected a new threat in a form of malware called LightNeuron. The malware was created by the Turla hacker group and targets Microsoft Exchange mail servers. The virus is able to take full control of the server, as well as impersonate an individual user by sending e-mails on his behalf.

For now, hackers have focused on governmental institutions such as Ministry of Foreign Affairs and a diplomatic organization from of the Eastern European countries.

Hackers control the virus by using hidden commands inside JPG files and PDF documents, thanks to which e-mails sent out do not raise suspicions.

According to Computerworld, which refers to the specialists, the virus is dangerous due to the fact that it can take up to several years before the attack can be detected. During this time, cybercriminals have access to all communications in the targeted organization.