ET MALWARE Cobalt Strike Beacon (Bing Profile)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/search/?q="; startswith;
content:"&go=Search&qs=bs&form="; distance:0; fast_pattern;
http.cookie;
content:"DUP="; startswith;
content:"&T="; distance:0;
content:"&A="; distance:0;
content:"&IG"; endswith;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Cobalt Strike Beacon (Bing Profile) · 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 Cobalt Strike Beacon (Bing Profile)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/search/?q="; startswith;
    content:"&go=Search&qs=bs&form="; distance:0; fast_pattern;
    http.cookie;
    content:"DUP="; startswith;
    content:"&T="; distance:0;
    content:"&A="; distance:0;
    content:"&IG"; endswith;
    http.header_names;
    content:!"Referer";
    reference:url,twitter.com/TheDFIRReport/status/1376878123061551104;
    reference:md5,18b0ca0508f92c5ac6e75b9865b77a51;
    classtype:trojan-activity;
    sid:2032354; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_03_30, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2022_03_24, reviewed_at 2023_08_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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