ET MALWARE Win32/Delf.OKR Variant CnC M1

Query · suricata

flow:established,to_server;
stream_size:server,<,5;
content:"|3d 22 3f 4b 0a|"; startswith;
Raw source ET MALWARE Win32/Delf.OKR Variant CnC M1 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (
    msg:"ET MALWARE Win32/Delf.OKR Variant CnC M1";
    flow:established,to_server;
    stream_size:server,<,5;
    content:"|3d 22 3f 4b 0a|"; startswith;
    reference:md5,320564554767ddd328932997067f64a5;
    classtype:command-and-control;
    sid:2033949; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_14, deployment Perimeter, malware_family Win32_Delf_OKR, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_14;
)

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