ET MALWARE CosmicDuke Exfiltrating Data via FTP STOR

Query · suricata

flow:established,to_server;
dsize:55<>65;
content:"STOR|20|"; depth:5;
pcre:"/^[a-z0-9]{1,10}[A-F0-9]+\.bin\r\n$/R";
content:".bin|0d 0a|"; fast_pattern;
Raw source ET MALWARE CosmicDuke Exfiltrating Data via FTP STOR · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE CosmicDuke Exfiltrating Data via FTP STOR";
    flow:established,to_server;
    dsize:55<>65;
    content:"STOR|20|"; depth:5;
    pcre:"/^[a-z0-9]{1,10}[A-F0-9]+\.bin\r\n$/R";
    content:".bin|0d 0a|"; fast_pattern;
    reference:md5,5080bc705217c614b9cbf67a679979a8;
    classtype:targeted-activity;
    sid:2023910; rev:5;
    metadata:created_at 2015_07_17, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;
)

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