alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil";
flow:established,to_server;
http.method;
content:"POST";
http.content_type;
content:"multipart/form-data|3b 20|boundary=1BEF0A57BE110FD467A"; bsize:49; fast_pattern;
http.request_body;
content:".zip|22 0d 0a|";
content:"|0d 0a|PK"; distance:0;
content:"screenshot.jpg"; distance:0;
http.header_names;
content:!"Referer";
reference:md5,6c8357280b50bb1808ec77b0292eb22b;
classtype:command-and-control;
sid:2029236; rev:2;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_08, deployment Perimeter, malware_family Arkei, malware_family Oski, confidence High, signature_severity Major, updated_at 2020_01_08;
)