Clambling (S0660)

[Clambling](https://attack.mitre.org/software/S0660) is a modular backdoor written in C++ that has been used by [Threat Group-3390](https://attack.mitre.org/groups/G0027) since at least 2017.(Citation: Trend Micro DRBControl February 2020)

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.