#alert http $EXTERNAL_NET any -> $HOME_NET any (
# msg:"ET ATTACK_RESPONSE Possible Remote System32 DLL Hijack Command Inbound via HTTP (T1038, T1105)";
# flow:established,from_server;
# content:"200"; http_stat_code;
# file_data;
# content:"copy|20|";
# content:".dll"; distance:0;
# content:"|5c|Windows|5c|System32|5c|"; distance:0; fast_pattern;
# content:".dll"; distance:0;
# content:"copy|20|";
# pcre:"/^(?P<dll_name>[a-z0-9\-_]{1,20})\.dll\s*\\\\(([0-9]{1,3}\.){3}[0-9]{1,3}|([a-z0-9\-]{1,30}\.){1,8}[a-z]{1,8})\\\w{1,10}\$\\Windows\\System32\\(?P=dll_name)\.dll/Ri";
# reference:url,posts.specterops.io/lateral-movement-scm-and-dll-hijacking-primer-d2f61e8ab992;
# classtype:attempted-user;
# sid:2027268; rev:2;
# metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2019_04_23, deployment Internal, performance_impact Low, confidence Medium, signature_severity Major, tag T1038, tag T1105, updated_at 2019_07_26;
#)