Who IsErIk: A Resurface of an Advanced Persistent Adware? September 23, 2019 https://labs.bitdefender.com/2019/09/who-iserik-a-resurface-of-an-advanced-persistent-adware/ "Who IsErIk: A Resurface of an Advanced Persistent Adware?" (PDF - 3.75 MB): https://www.bitdefender.com/files/News/CaseStudies/study/284/Bitdefender-WhitePaper-Erik-CREA3910-en-EN-GenericUse.pdf