ET MALWARE Suspected Smokeloader Payload Related Activity (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/connS.php?"; endswith; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
http.request_body;
content:"TRT="; startswith;
content:"&IMACH="; distance:0;
Raw source ET MALWARE Suspected Smokeloader Payload Related Activity (POST) · 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 Suspected Smokeloader Payload Related Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/connS.php?"; endswith; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    http.request_body;
    content:"TRT="; startswith;
    content:"&IMACH="; distance:0;
    reference:md5,bcb2c402c896b5477e1f94a1c7278682;
    classtype:trojan-activity;
    sid:2052949; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_05_29, deployment Perimeter, malware_family SmokeLoader, confidence High, signature_severity Critical, tag c2, updated_at 2024_05_29, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)

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