alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Unk.VBScript Requesting Instruction from CnC"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/open?topics=s9"; fast_pattern; depth:15; pcre:"/^[0-9]{3}$/R"; http.header_names; content:!"Referer"; reference:md5,7489fb981cd054c665e442dfea8ef203; reference:url,blogs.jpcert.or.jp/en/2019/07/spear-phishing-against-cryptocurrency-businesses.html; classtype:command-and-control; sid:2027698; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_07_10, deployment Perimeter, malware_family Win32_Unk_VBScript, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_08_31;)