ISATAP Router Address Was Set
Detects the configuration of a new ISATAP router on a Windows host. While ISATAP is a legitimate Microsoft technology for IPv6 transition, unexpected or unauthorized ISATAP router configurations could indicate a potential IPv6 DNS Takeover attack using tools like mitm6. In such attacks, adversaries advertise themselves as DHCPv6 servers and set malicious ISATAP routers to intercept traffic. This detection should be correlated with network baselines and known legitimate ISATAP deployments in your environment.
Convert In Phoenix Studio
Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
detection:
selection:
EventID: 4100
Provider_Name: 'Microsoft-Windows-Iphlpsvc'
filter_main_localhost:
IsatapRouter:
- '127.0.0.1'
- '::1'
filter_optional_null:
IsatapRouter: null
condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*Legitimate ISATAP router configuration in enterprise environments
IPv6 transition projects and network infrastructure changes
Network administrators configuring dual-stack networking
Automatic ISATAP configuration in some Windows deployments