ET HUNTING Base64 Encoded ipconfig sent via HTTP POST M3

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"XaW5kb3dzIElQIENvbmZpZ3VyYXRpb2"; fast_pattern;
pcre:"/(?:Q29ubmVjdGlvbi1zcGVjaWZpYyBETlMgU3VmZml4|Nvbm5lY3Rpb24tc3BlY2lmaWMgRE5TIFN1ZmZpe|Db25uZWN0aW9uLXNwZWNpZmljIEROUyBTdWZmaX)/R";
Raw source ET HUNTING Base64 Encoded ipconfig sent via HTTP POST M3 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET HUNTING Base64 Encoded ipconfig sent via HTTP POST M3";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"XaW5kb3dzIElQIENvbmZpZ3VyYXRpb2"; fast_pattern;
    pcre:"/(?:Q29ubmVjdGlvbi1zcGVjaWZpYyBETlMgU3VmZml4|Nvbm5lY3Rpb24tc3BlY2lmaWMgRE5TIFN1ZmZpe|Db25uZWN0aW9uLXNwZWNpZmljIEROUyBTdWZmaX)/R";
    reference:md5,1df312629294f2de70a335a751a13a28;
    classtype:bad-unknown;
    sid:2034643; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_09, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_09;
)

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