ET MALWARE MSIL/CrimsonRAT Activity (POST)

Query · suricata

flow:established,to_server;
http.request_line;
content:"POST /indexer.php HTTP/1.1";
http.request_body;
content:"q="; startswith;
content:"|7c|ver="; distance:0; fast_pattern;
content:"|7c 7c|"; within:4;
http.header_names;
content:!"Referer|0d 0a|";
content:!"User-Agent|0d 0a|";
content:!"Accept";
Raw source ET MALWARE MSIL/CrimsonRAT Activity (POST) · Suricata
Esc
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 MSIL/CrimsonRAT Activity (POST)";
    flow:established,to_server;
    http.request_line;
    content:"POST /indexer.php HTTP/1.1";
    http.request_body;
    content:"q="; startswith;
    content:"|7c|ver="; distance:0; fast_pattern;
    content:"|7c 7c|"; within:4;
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"User-Agent|0d 0a|";
    content:!"Accept";
    reference:url,twitter.com/0xrb/status/1517052777167732736?s=21&t=zTZ6AqU3_DB36dZ3DE1HCg;
    reference:md5,41702a1959b1b7038237d75330b904b6;
    classtype:trojan-activity;
    sid:2036290; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_04_21, deployment Perimeter, malware_family CrimsonRAT, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_21;
)

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