alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Powershell/PowHeartBeat CnC Checkin - HTTPS"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/latest/AdobeMessagingClient.js"; fast_pattern; http.cookie; content:"s_ecid="; startswith; http.host; content:!"client.messaging.adobe.com"; reference:url,www.welivesecurity.com/2022/09/06/worok-big-picture/; classtype:trojan-activity; sid:2038830; rev:1; metadata:attack_target Client_and_Server, created_at 2022_09_13, deployment SSLDecrypt, malware_family PowerShell_PowHeartBeat, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_14;)