alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MageCart Skimmer Header Observed Outbound"; flow:established,to_server; http.request_header; header_lowercase; bsize:43; content:"origin|3a 20|http|3a 2f 2f|azjaaxhscvupcszfrvtdygdhdfid"; fast_pattern; reference:md5,a8eb9c8aef382bb415ead1b186160759; reference:url,malwarebytes.com/blog/threat-intelligence/2023/04/kritec-art; classtype:trojan-activity; sid:2045244; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_04_28, deployment Perimeter, deployment SSLDecrypt, malware_family MageCart, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_26;)