alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Fake Browser Update Domain in TLS SNI (krafttopia .net)"; flow:established,to_server; tls.sni; bsize:14; content:"krafttopia.net"; fast_pattern; reference:url,www.trellix.com/en-us/about/newsroom/stories/research/new-techniques-of-fake-browser-updates.html; classtype:exploit-kit; sid:2048092; rev:1; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2023_09_14, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Exploit_Kit, updated_at 2023_09_14, reviewed_at 2023_09_14;)

Reference
URL	http://www.trellix.com/en-us/about/newsroom/stories/research/new-techniques-of-fake-browser-updates.html

Metadata
affected_product	Web_Browsers
attack_target	Client_Endpoint
created_at	2023_09_14
deployment	Perimeter
performance_impact	Low
confidence	High
signature_severity	Minor
tag	Exploit_Kit
updated_at	2023_09_14
reviewed_at	2023_09_14