ET MALWARE Cobalt Strike Activity (GET)

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET /1Pfu HTTP/1.1"; fast_pattern;
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a|Cache-Control|0d 0a 0d 0a|"; bsize:49;
http.user_agent;
content:"|3b 20|MANM|29|"; endswith;
Raw source ET MALWARE Cobalt Strike 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 Activity (GET)";
    flow:established,to_server;
    http.request_line;
    content:"GET /1Pfu HTTP/1.1"; fast_pattern;
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a|Cache-Control|0d 0a 0d 0a|"; bsize:49;
    http.user_agent;
    content:"|3b 20|MANM|29|"; endswith;
    reference:md5,8eaebe560669154c71b266f858a56c37;
    reference:url,github.com/DCSO/Blog_CyTec/blob/main/2022_11_hz_rat_goes_china/ioc_list.txt;
    reference:url,twitter.com/DCSO_CyTec/status/1592866591926255619;
    classtype:trojan-activity;
    sid:2039801; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_11_17, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2022_11_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)

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