Phishing Two-Hop SaaS Open-Redirect via holabrief.com or loopedin.io
Detects HTTP requests to the SaaS platforms 'holabrief.com' or 'loopedin.io' that contain common URL redirection parameters, characteristic of an open-redirect abuse tactic used in phishing campaigns. These platforms are leveraged as intermediate hops to obfuscate the final destination of phishing links. The rule identifies the initial request and suggests correlation with subsequent traffic to unknown destinations to confirm a two-hop redirection chain.
Sigma
