SYNful Knock Scanner
Summary: Cisco Talos released a Python-based scanning tool, synknockscan version 1.0.1, to detect Cisco routers compromised by the persistent malware called SYNful Knock, which had to be installed using valid credentials or physical access rather than a vulnerability. The tool requires Python 2.7 and scapy v2.3.1, injects custom-crafted packets at the Ethernet layer with root privileges, and can only detect hosts responding to the malware's known knock at a particular point in time.
What's compelling: Talos states plainly that the tool cannot establish that a network is free of malware that may have evolved to use a different set of signatures, so a clean scan is not a clean bill of health for the routers carrying your traffic.
Read the original at Cisco Talos ↗
- Topics
- Threat Actors & Nation-State
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