alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OSX/NukeSped Variant CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.content_type; content:"N9dLfqxHNUUw8qaUPqggVTpX"; fast_pattern; reference:md5,451c23709ecd5a8461ad060f6346930c; reference:url,us-cert.cisa.gov/ncas/analysis-reports/ar21-048e; classtype:command-and-control; sid:2031637; rev:1; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2021_02_19, deployment Perimeter, deployment SSLDecrypt, malware_family NukeSped, performance_impact Low, confidence High, signature_severity Major, tag Lazarus, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_02_19;)