alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Generik.BUTNSNA Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"|2e|ashx|3f|UserName|3d|"; fast_pattern; content:"|26|ClientID|3d|"; distance:0; content:"|26|ClientVer|3d|"; distance:0; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|"; startswith; reference:md5,ec57a218756bff2b4d7656ac55a73af2; classtype:trojan-activity; sid:2042992; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_12_21, deployment Perimeter, malware_family Win32_Generik_BUTNSNA, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_21, reviewed_at 2024_12_24;)