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/"; startswith; fast_pattern; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.header_names; content:!"Referer"; reference:md5,05aca0e7e247224adebecc3239a4cfbc; reference:md5,4f70faa3c0ad89de6a862f729678fc77; reference:url,twitter.com/s1ckb017/status/1445704873345896455; reference:url,twitter.com/s1ckb017/status/1445706513956306950; classtype:trojan-activity; sid:2034147; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_10_06, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_15;)