Security News > 2025 > January > New VPN Backdoor

A newly discovered VPN backdoor uses some interesting tactics to avoid detection: When threat actors use backdoor malware to gain access to a network, they want to make sure all their hard work can’t be leveraged by competing groups or detected by defenders. One countermeasure is to equip the backdoor with a passive agent that remains dormant until it receives what’s known in the business as a “magic packet.” On Thursday, researchers revealed that a never-before-seen backdoor that quietly took hold of dozens of enterprise VPNs running Juniper Network’s Junos OS has been doing just that...

News URL

https://www.schneier.com/blog/archives/2025/01/new-vpn-backdoor.html