ET MALWARE Win32/Sabsik.FL.B!ml CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.user_agent;
content:"Go-http-client"; startswith;
http.content_type;
content:"application/x-www-form-urlencoded"; bsize:33;
http.request_body;
content:"|ef bc 9a|"; depth:40;
content:"Memorytotal|ef bc 9a|"; fast_pattern;
content:"|ef bc 9a 5b|System|20|Process|5d 20|"; distance:0;
Raw source ET MALWARE Win32/Sabsik.FL.B!ml 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 Win32/Sabsik.FL.B!ml CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.user_agent;
    content:"Go-http-client"; startswith;
    http.content_type;
    content:"application/x-www-form-urlencoded"; bsize:33;
    http.request_body;
    content:"|ef bc 9a|"; depth:40;
    content:"Memorytotal|ef bc 9a|"; fast_pattern;
    content:"|ef bc 9a 5b|System|20|Process|5d 20|"; distance:0;
    reference:md5,84fffb6b0ee44238261a21a0af066c12;
    classtype:command-and-control;
    sid:2034032; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_27, deployment Perimeter, malware_family Win32_Sabsik_FL_B_ml, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_27;
)

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