alert dns $HOME_NET any -> any any (msg:"ET MALWARE OSX/Proton.B DNS Lookup"; dns.query; content:"handbrake.biz"; startswith; nocase; endswith; fast_pattern; reference:url,objective-see.com/blog/blog_0x1D.html; classtype:trojan-activity; sid:2024284; rev:7; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2017_05_09, deployment Perimeter, malware_family OSX_Proton, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2024_04_13;)