ET MALWARE Nimbus Manticore Minibrowse Data Exfiltration Attempt

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/api/hospital/"; startswith; fast_pattern;
pcre:"/^\d{9,}\x2f\d{7,}/R";
content:"|3f|q";
http.content_type;
content:"multipart/form-data";
http.request_body;
content:"filename|3d 22|";
pcre:"/^(?:chrome|edge)Log\x2etxt/R";
target:src_ip;
Raw source ET MALWARE Nimbus Manticore Minibrowse Data Exfiltration Attempt · 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 Nimbus Manticore Minibrowse Data Exfiltration Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/hospital/"; startswith; fast_pattern;
    pcre:"/^\d{9,}\x2f\d{7,}/R";
    content:"|3f|q";
    http.content_type;
    content:"multipart/form-data";
    http.request_body;
    content:"filename|3d 22|";
    pcre:"/^(?:chrome|edge)Log\x2etxt/R";
    reference:url,research.checkpoint.com/2025/nimbus-manticore-deploys-new-malware-targeting-europe/;
    classtype:trojan-activity;
    sid:2064968; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_09_29, deployment Perimeter, malware_family Stealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, tag Nimbus_Manticore, updated_at 2025_09_29, mitre_tactic_id TA0009, mitre_tactic_name Collection, mitre_technique_id T1005, mitre_technique_name Data_from_local_system;
    target:src_ip;
)

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