alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE MSIL/Spy.Agent.DYS Exfil";
flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/c?uid="; startswith; fast_pattern;
http.content_type;
content:"multipart/form-data|3b 20|boundary|3d|";
http.request_body;
content:"filename|3d 22|Screenshot.bmp|22|";
reference:md5,a101aebd7e97dba97311cde683a64a32;
classtype:trojan-activity;
sid:2037731; rev:1;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_07_08, deployment Perimeter, malware_family MSIL_Spy_Agent_DYS, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_08;
)