alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Maldoc Macro Request (GET)"; flow:established,to_server; urilen:1; http.method; content:"GET"; http.user_agent; bsize:35; content:"Mozilla/4.0 (compatible|3b 20|ms-office)"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:!"|0d 0a|x-idcrl_accepted|0d 0a|"; reference:md5,d3032968085db665381d9cbd3569f330; reference:url,thedfirreport.com/2023/05/22/icedid-macro-ends-in-nokoyawa-ransomware/; classtype:trojan-activity; sid:2046199; rev:5; metadata:attack_target Client_Endpoint, created_at 2023_06_09, deployment Perimeter, deployment SSLDecrypt, deprecation_reason False_Positive, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30, reviewed_at 2023_08_22; target:src_ip;)