ET MALWARE Win32/Sinresby.B Downloader CnC Activity M2

Query · suricata

flow:established,to_server;
content:"|00 00 00 7b 22 63 67 69 22 3a 31|"; offset:1; depth:11;
content:"|22|data|22 3a 7b 22|mac|22 3a 22|"; distance:0; fast_pattern;
content:"|22 2c 22|pc|22 3a 22|"; distance:0;
Raw source ET MALWARE Win32/Sinresby.B Downloader CnC Activity M2 · Suricata
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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/Sinresby.B Downloader CnC Activity M2";
    flow:established,to_server;
    content:"|00 00 00 7b 22 63 67 69 22 3a 31|"; offset:1; depth:11;
    content:"|22|data|22 3a 7b 22|mac|22 3a 22|"; distance:0; fast_pattern;
    content:"|22 2c 22|pc|22 3a 22|"; distance:0;
    reference:md5,8049009d9675d5ac345ce96d1a7c9e67;
    classtype:command-and-control;
    sid:2033793; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_08_25, deployment Perimeter, malware_family Win32_Sinresby_B, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_25;
)

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