ET MALWARE Suspected Bitter APT Related Activity

Query · suricata

flow:established,to_server;
dsize:<200;
content:"|00 ca 0a 62|"; offset:1; depth:4; fast_pattern;
content:"|ca fa ca ca ca|"; endswith;
Raw source ET MALWARE Suspected Bitter APT Related Activity · 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-pkt $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspected Bitter APT Related Activity";
    flow:established,to_server;
    dsize:<200;
    content:"|00 ca 0a 62|"; offset:1; depth:4; fast_pattern;
    content:"|ca fa ca ca ca|"; endswith;
    reference:url,twitter.com/ThreatBookLabs/status/1592809339869593601;
    reference:md5,ef099d5fe4075132bf3812c9d5ffa8f9;
    reference:md5,a9ed771d128a6ccf67097b6ecd136885;
    reference:md5,06a7eccd74a6aa5aa12755cd48829f90;
    classtype:trojan-activity;
    sid:2039800; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_11_16, deployment Perimeter, malware_family Bitter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_11_16;
)

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