alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET ADWARE_PUP Win32/SuperDiag PUP CnC Activity";
flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/diag/"; startswith;
content:".txt"; endswith;
http.host;
content:"superdiag.xyz"; fast_pattern;
http.header_names;
content:!"Referer";
content:!"User-Agent";
threshold:type limit, count 1, seconds 60, track by_src;
reference:md5,0ef7d3285b890c229e1aee9fe74c5cc0;
classtype:pup-activity;
sid:2038827; rev:1;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_14, deployment Perimeter, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_14, reviewed_at 2025_10_24;
)