ET MALWARE OILRIG CnC POST

Query · suricata

flow:established,to_server;
content:"|3a 20|chrome|0d 0a|"; fast_pattern;
http.method;
content:"POST";
http.uri;
content:"/?v="; startswith;
http.header_names;
content:"From|0d 0a|User-Agent|0d 0a|";
content:!"Referer";
http.user_agent;
content:"chrome"; bsize:6;
Raw source ET MALWARE OILRIG CnC POST · 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 OILRIG CnC POST";
    flow:established,to_server;
    content:"|3a 20|chrome|0d 0a|"; fast_pattern;
    http.method;
    content:"POST";
    http.uri;
    content:"/?v="; startswith;
    http.header_names;
    content:"From|0d 0a|User-Agent|0d 0a|";
    content:!"Referer";
    http.user_agent;
    content:"chrome"; bsize:6;
    reference:url,unit42.paloaltonetworks.com/oilrig-novel-c2-channel-steganography/;
    reference:md5,acaff6cb817399848887caef0104bd03;
    classtype:command-and-control;
    sid:2030634; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2020_07_30, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_31;
)

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