ET MALWARE Cobalt Strike Related Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/maps/overlaybfpr?q="; startswith; fast_pattern;
http.cookie;
content:"SRCHD=AF=NOFORM|3b|_SS="; startswith;
pcre:"/^[A-Za-z0-9+=/]{172}$/R";
http.user_agent;
content:"Mozilla/5.0|20|"; startswith;
Raw source ET MALWARE Cobalt Strike Related Activity (GET) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Cobalt Strike Related Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/maps/overlaybfpr?q="; startswith; fast_pattern;
    http.cookie;
    content:"SRCHD=AF=NOFORM|3b|_SS="; startswith;
    pcre:"/^[A-Za-z0-9+=/]{172}$/R";
    http.user_agent;
    content:"Mozilla/5.0|20|"; startswith;
    reference:md5,50b3fb6a2cf209d4bcbea0546e82f58f;
    reference:url,blog.talosintelligence.com/2022/05/mustang-panda-targets-europe.html;
    classtype:trojan-activity;
    sid:2036632; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_05_19, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, tag TA416, updated_at 2022_05_19, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)

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