ET MALWARE APT Backspace CnC Beacon

Query · suricata

flow:to_server,established;
http.method;
content:"POST";
http.header;
content:"HOST|3a 20|";
http.user_agent;
content:"SJZJ (compatible|3b 20|MSIE 6.0|3b 20|Win32)"; fast_pattern; startswith;
http.header_names;
content:!"Accept";
content:!"Referer|0d 0a|";
Raw source ET MALWARE APT Backspace CnC Beacon · Suricata
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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 APT Backspace CnC Beacon";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.header;
    content:"HOST|3a 20|";
    http.user_agent;
    content:"SJZJ (compatible|3b 20|MSIE 6.0|3b 20|Win32)"; fast_pattern; startswith;
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    reference:md5,ddf0981aebeea6ba9abdae6ddf8ed4e2;
    classtype:targeted-activity;
    sid:2021184; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_06_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_10_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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