ET MALWARE Shark Stealer CnC Checkin

Query · suricata

flow:established,to_server;
dsize:<50;
content:"data|3a|"; startswith;
content:"|3a|shark|5f|"; fast_pattern;
target:src_ip;
Raw source ET MALWARE Shark Stealer CnC Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Shark Stealer CnC Checkin";
    flow:established,to_server;
    dsize:<50;
    content:"data|3a|"; startswith;
    content:"|3a|shark|5f|"; fast_pattern;
    reference:md5,8ec92ce467117d0616d9728c3141004c;
    reference:url,otx.alienvault.com/pulse/68fb82aa72486ffb1983f5f5;
    classtype:trojan-activity;
    sid:2065384; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, created_at 2025_10_24, deployment Perimeter, malware_family SharkStealer, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_24, 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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