alert http any any -> $HOME_NET any (msg:"ET HUNTING Win32/BROOXML Document Fingerprint"; flow:established,to_client; flowbits:set,ET.brooxml; flowbits:noalert; http.response_body; content:"|21 20 03 20 c3 be c3 bf 09 20|"; content:"|06 20 20 20 20 20 20 20 20 20 20 20 01 20 20 20 06 20 20 20 20 20 20 20 20 10 20 20 05 20 20 20 01 20 20 20 c3 be c3 bf c3 bf c3 bf|"; fast_pattern; within:45; reference:md5,95286eccb7381d763eed290a943b6dad; classtype:bad-unknown; sid:2057736; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_11_20, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_20; target:dest_ip;)