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TH
MEDIUM
Threat Intel
Abusing .arpa Infrastructure TLDs for Phishing Campaigns
Threat actors are leveraging the .arpa infrastructure TLD and DNS management controls to mask malicious content and increase phishing success rates.
Runtime Rebel Intel
4 min read·Mar 9, 2026
TH
HIGH
Threat Intel
Abusing .arpa DNS and IPv6 to Bypass Phishing Defenses
Threat actors exploit .arpa domains and IPv6 reverse DNS for phishing evasion, bypassing email security gateways and domain reputation checks. Defenders need updated
Runtime Rebel Intel
4 min read·Mar 8, 2026