ET MALWARE W32/Asprox Passgrub POST CnC Beacon

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
pcre:"/^\x2F[a-f0-9]{40,60}$/i";
http.request_body;
content:"akk="; depth:4;
content:"&client="; distance:0;
Raw source ET MALWARE W32/Asprox Passgrub POST CnC Beacon · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32/Asprox Passgrub POST CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/^\x2F[a-f0-9]{40,60}$/i";
    http.request_body;
    content:"akk="; depth:4;
    content:"&client="; distance:0;
    reference:url,www.trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-asprox-reborn.pdf;
    classtype:command-and-control;
    sid:2016529; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2013_03_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_04_23, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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