The Tick group, discovered by researchers at Palo Alto Networks Unit 42, reportedly targets organizations from Japan and South Korea with custom malware, including Minzen, Datper, Nioupale (aka Daserf), and HomamDownloader.

Though the type of USB drive compromised in the attack was supposed to be certified as secure by the South Korean ITSCC, the Tick group loaded malicious files onto the USBs. The number of drives compromised remains unknown. Read more..