alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon Related Maldoc Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/ELENAPC/principles/"; startswith; nocase; content:".mp3"; endswith; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.header_names; content:!"Referer"; reference:url,twitter.com/s1ckb017/status/1443950604968149010; reference:md5,b345a53a6a432fa2467a0f7931bd79ae; classtype:trojan-activity; sid:2034087; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_01, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_01;)