ET MALWARE Win32/Small.NO Checkin

Query · suricata

flow:established,to_server;
stream_size:server,<,5;
dsize:76;
content:"MB|00 00|"; offset:32; depth:9;
content:"|32 2e 32 d5 fd ca bd b0 e6 00 00 00|"; endswith; fast_pattern;
Raw source ET MALWARE Win32/Small.NO 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Small.NO Checkin";
    flow:established,to_server;
    stream_size:server,<,5;
    dsize:76;
    content:"MB|00 00|"; offset:32; depth:9;
    content:"|32 2e 32 d5 fd ca bd b0 e6 00 00 00|"; endswith; fast_pattern;
    reference:md5,e09e70ae301e0816355ad0bfa0ab8707;
    classtype:command-and-control;
    sid:2034301; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_10_29, deployment Perimeter, malware_family Win32_Small_NO, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_29;
)

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