ET MALWARE Possible Raspberry Robin Activity M2 (GET)

Query · suricata

flow:established,to_server;
urilen:39<>59;
http.method;
content:"GET";
http.uri;
content:!"|2e|";
http.header;
content:"Connection|3a 20|Keep|2d|Alive|0d 0a|Accept|3a 20 2a 2f 2a 0d 0a|User|2d|Agent|3a 20|Windows|20|Installer|0d 0a|Host|3a 20|"; startswith; fast_pattern;
http.header_names;
content:"|0d 0a|Connection|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:42;
target:src_ip;
Raw source ET MALWARE Possible Raspberry Robin Activity M2 (GET) · 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 1024: (
    msg:"ET MALWARE Possible Raspberry Robin Activity M2 (GET)";
    flow:established,to_server;
    urilen:39<>59;
    http.method;
    content:"GET";
    http.uri;
    content:!"|2e|";
    http.header;
    content:"Connection|3a 20|Keep|2d|Alive|0d 0a|Accept|3a 20 2a 2f 2a 0d 0a|User|2d|Agent|3a 20|Windows|20|Installer|0d 0a|Host|3a 20|"; startswith; fast_pattern;
    http.header_names;
    content:"|0d 0a|Connection|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:42;
    reference:md5,f5e6ffec3c33e9c84e11d6101d181c4e;
    reference:md5,131243c786a2efed6e7f35dabfef4be8;
    reference:md5,b7d6f079a6b084c1c8293ab4cd54b585;
    reference:md5,d1993684f055e9cfd964d35952f570f8;
    reference:md5,3329ad32799c142d6cd5e7f6a1dff755;
    reference:url,twitter.com/BushidoToken/status/1646855931945205763;
    reference:url,redcanary.com/blog/raspberry-robin;
    classtype:trojan-activity;
    sid:2045212; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_04_27, deployment Perimeter, performance_impact Low, confidence Low, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_27;
    target:src_ip;
)

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