[UPPERCUT](https://attack.mitre.org/software/S0275) is a 32-bit HTTP-based backdoor that has been used by [menuPass](https://attack.mitre.org/groups/G0045) since at least 2017.(Citation: FireEye APT10 Sept 2018) Once thought to be exclusive to [menuPass](https://attack.mitre.org/groups/G0045), [UPPERCUT](https://attack.mitre.org/software/S0275) was also observed being used by [menuPass](https://attack.mitre.org/groups/G0045)-associated [MirrorFace](https://attack.mitre.org/groups/G1054) during [Operation AkaiRyū](https://attack.mitre.org/campaigns/C0060).(Citation: Trend Micro Earth Kasha Anel NOV 2024)