ET MALWARE JS/Ostap CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?as=";
content:"&kl="; distance:0;
content:"&ed="; distance:0;
content:"@@"; distance:0;
content:"@@"; distance:0;
content:"@@*"; fast_pattern; distance:0;
http.header_names;
content:!"Referer";
Raw source ET MALWARE JS/Ostap CnC Activity · 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 MALWARE JS/Ostap CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?as=";
    content:"&kl="; distance:0;
    content:"&ed="; distance:0;
    content:"@@"; distance:0;
    content:"@@"; distance:0;
    content:"@@*"; fast_pattern; distance:0;
    http.header_names;
    content:!"Referer";
    reference:md5,f5cf9ca73dd30caf43d75dd19240a79e;
    classtype:trojan-activity;
    sid:2030601; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_28, deployment Perimeter, malware_family Ostap, confidence High, signature_severity Major, updated_at 2020_07_28;
)

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