alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MacSync Stage 2 CnC Exfil"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:5; content:"/gate"; http.user_agent; content:"Macintosh"; http.request_body; content:"filename|3d 22|osalogging|2e|zip|22|"; fast_pattern; reference:url,securitylabs.datadoghq.com/articles/tech-impersonators-clickfix-and-macos-infostealers; reference:md5,5d3a849baf1da37696e6aefde1e0f15a; classtype:command-and-control; sid:2067675; rev:1; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_02_13, deployment Perimeter, deployment SSLDecrypt, malware_family MacSync, confidence High, signature_severity Critical, updated_at 2026_02_13; target:src_ip;)