ET MALWARE MSIL/Crimson Receiving Command (folders list)

Query · suricata

flow:established,from_server;
content:"fldr="; offset:5;
byte_jump:4,0,little,from_beginning,post_offset 4;
isdataat:!2,relative;
Raw source ET MALWARE MSIL/Crimson Receiving Command (folders list) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE MSIL/Crimson Receiving Command (folders list)";
    flow:established,from_server;
    content:"fldr="; offset:5;
    byte_jump:4,0,little,from_beginning,post_offset 4;
    isdataat:!2,relative;
    reference:md5,94d29dded4dfd920fc4153f18e82fc6c;
    classtype:trojan-activity;
    sid:2036284; rev:3;
    metadata:created_at 2016_02_17, malware_family MSIL_Crimson, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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