ET MALWARE W32/Depyot.Downloader CnC Beacon

Query · suricata

flow:established,to_server;
http.uri;
content:"/pdf.php?id="; fast_pattern;
http.user_agent;
content:"Mozilla/4.0 (compatible)"; bsize:24;
Raw source ET MALWARE W32/Depyot.Downloader 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/Depyot.Downloader CnC Beacon";
    flow:established,to_server;
    http.uri;
    content:"/pdf.php?id="; fast_pattern;
    http.user_agent;
    content:"Mozilla/4.0 (compatible)"; bsize:24;
    reference:url,www.fireeye.com/blog/technical/targeted-attack/2013/03/internet-explorer-8-exploit-found-in-watering-hole-campaign-targeting-chinese-dissidents.html;
    reference:url,www.microsoft.com/security/portal/threat/encyclopedia/entry.aspx?Name=TrojanDownloader%3AWin32%2FDepyot.A&ThreatID=-2147288740;
    classtype:command-and-control;
    sid:2016638; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2013_03_22, 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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