[J-magic](https://attack.mitre.org/software/S1203) is a custom variant of the [cd00r](https://attack.mitre.org/software/S1204) backdoor tailored to target Juniper routers that was first observed during the [J-magic Campaign](https://attack.mitre.org/campaigns/C0050) in mid-2023. [J-magic](https://attack.mitre.org/software/S1203) monitors TCP traffic for five predefined parameters or "magic packets" to be sent by the attackers before activating on compromised devices.(Citation: Lumen J-Magic JAN 2025)