alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TransparentTribe APT Related Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.user_agent; content:"Mozilla/4.0|20|(compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; bsize:57; http.request_body; content:"symetric="; startswith; fast_pattern; content:"&unsyms="; distance:0; content:"&polls="; distance:0; http.header_names; content:!"Referer|0d 0a|"; reference:md5,5cbcc3485f4286098b3a111ceec8ce54; reference:md5,14a7002d7787ebc78d76479c73fc2856; classtype:trojan-activity; sid:2035624; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_03_28, deployment Perimeter, malware_family TransparentTribe, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_16;)