alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Hicrazyk.A Downloader Install CnC Beacon"; flow:established,to_server; http.uri; content:"/setup/?name="; fast_pattern; content:"&ini="; content:"&v="; http.user_agent; content:"NSISDL/"; depth:7; reference:url,www.microsoft.com/security/portal/threat/encyclopedia/entry.aspx?Name=TrojanDownloader%3AWin32%2FHicrazyk.A&ThreatID=-2147281007; reference:md5,ddb8110ec415b7b6f43c0ef2b4076d45; classtype:command-and-control; sid:2018435; rev:9; metadata:attack_target Client_Endpoint, created_at 2014_04_30, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_24, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)