ET MALWARE Win32/Coldstealer Sending System Information (POST)

Query · suricata

flow:established,to_server;
urilen:1;
http.method;
content:"POST";
http.header_names;
content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a|Expect|0d 0a|Connection|0d 0a 0d 0a|"; bsize:46;
http.request_body;
content:"PK"; startswith;
content:"Information.txt"; distance:0; fast_pattern;
Raw source ET MALWARE Win32/Coldstealer Sending System Information (POST) · 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 http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Coldstealer Sending System Information (POST)";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"POST";
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a|Expect|0d 0a|Connection|0d 0a 0d 0a|"; bsize:46;
    http.request_body;
    content:"PK"; startswith;
    content:"Information.txt"; distance:0; fast_pattern;
    reference:md5,06b31367d65a411b1f2a7b3091fb31d4;
    reference:url,securelist.com/nullmixer-oodles-of-trojans-in-a-single-dropper/107498/;
    classtype:trojan-activity;
    sid:2039040; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_09_29, malware_family Win32_Coldstealer, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_29;
)

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