alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspected Gamaredon Template Retrieval"; flow:established,to_server; http.method; content:"HEAD"; http.uri; content:"/WIN-"; startswith; fast_pattern; http.user_agent; content:"Microsoft Office"; startswith; http.header_names; content:!"Referer"; reference:md5,3cc4610c5487ec7326d98797fd119b2e; reference:url,twitter.com/Cyber0verload/status/1691784626958737562; classtype:bad-unknown; sid:2047927; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_09_06, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_06, reviewed_at 2023_09_06; target:src_ip;)