S0398HyperBro

[HyperBro](https://attack.mitre.org/software/S0398) is a custom in-memory backdoor used by [Threat Group-3390](https://attack.mitre.org/groups/G0027).(Citation: Unit42 Emissary Panda May 2019)(Citation: Securelist LuckyMouse June 2018)(Citation: Hacker News LuckyMouse June 2018) Documented platforms: Windows. Attributed to ATT&CK group: Threat Group-3390. Catalogued in ATT&CK 14.1. 4 references curated.