ET MALWARE Win32/Agent.AAIB Variant CnC

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".jpg"; endswith;
http.user_agent;
content:"WinHttpClient"; bsize:13;
http.header_names;
content:"|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; fast_pattern;
Raw source ET MALWARE Win32/Agent.AAIB Variant CnC · 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/Agent.AAIB Variant CnC";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".jpg"; endswith;
    http.user_agent;
    content:"WinHttpClient"; bsize:13;
    http.header_names;
    content:"|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; fast_pattern;
    reference:md5,0e3b41da52382744e5b2c1c38be00f04;
    reference:url,www.blackberry.com/content/dam/blackberry-com/asset/enterprise/pdf/direct/report-bb-decade-of-the-rats.pdf;
    classtype:command-and-control;
    sid:2029893; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2020_04_13, deployment Perimeter, malware_family Win32_Agent_AAIB, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_16;
)

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