A report released today dives deep into technical aspects of a Linux backdoor now tracked as Bvp47 that is linked to the Equation Group, the advanced persistent threat actor tied to the U.S. National Security Agency.

Bvp47 survived until today almost undetected, despite being submitted to the Virus Total antivirus database for the first time close to a decade ago, in late 2013.

https://www.bleepingcomputer.com/news/security/nsa-linked-bvp47-linux-backdoor-widely-undetected-for-10-years/