alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Donot Group Pult Downloader Activity (POST) M5"; flow:established,to_server; urilen:8<>28; http.method; content:"POST"; http.uri; content:!"|2e|"; http.content_type; content:"application/x-www-form-urlencoded"; bsize:33; http.request_body; content:"batac="; startswith; fast_pattern; http.user_agent; content:!"Linux|3b|"; content:!"iPhone|3b|"; http.header_names; content:"|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|Host|0d 0a|Content-Length|0d 0a|Cache-Control|0d 0a 0d 0a|"; content:!"Referer"; reference:md5,9d91afded722aca329e62b4ad6af10b0; classtype:trojan-activity; sid:2045235; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_04_28, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_01; target:src_ip;)