ET MALWARE W32/TrojanSpy.MSIL Fetch Header CnC Beacon

Query · suricata

flow:established,to_server;
http.uri;
content:"/features/fetch/header/";
http.header_names;
content:!"User-Agent|0d 0a|";
content:!"Content-";
content:!"Accept-";
Raw source ET MALWARE W32/TrojanSpy.MSIL Fetch Header 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/TrojanSpy.MSIL Fetch Header CnC Beacon";
    flow:established,to_server;
    http.uri;
    content:"/features/fetch/header/";
    http.header_names;
    content:!"User-Agent|0d 0a|";
    content:!"Content-";
    content:!"Accept-";
    reference:url,www.microsoft.com/security/portal/threat/encyclopedia/entry.aspx?Name=TrojanSpy%3AMSIL%2FCrime.B;
    classtype:command-and-control;
    sid:2016536; 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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