More about the Icefog group, its tactics, techniques, procedures and tools
Custom-made cyberespionage tools, particularly the "Icefog" backdoor set (also known as "Fucobha")
The name "Icefog" comes from a string used in the command-and-control server name of one of the malware samples.
A threat actor targeting government institutions, military contractors, maritime groups, telecom and satellite operations, and industrial and high-tech companies, primarily in South Korea and Japan, since 2011. The group relies on spear-phishing and known vulnerabilities to infect the system. They then use their custom-made cyber-espionage tools to steal e-mail and account passwords, sensitive information, and company plans.