[Unknown Logger](https://attack.mitre.org/software/S0130) is a publicly released, free backdoor. Version 1.5 of the backdoor has been used by the actors responsible for the MONSOON campaign. (Citation: Forcepoint Monsoon)
Platforms: Windows
MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.