ET MALWARE SnappyTCP Reverse Shell Client Checkin M2

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET|20 2f|ssl|2e|php|20|HTTP|2f|1|2e|1"; bsize:21;
http.header_names;
content:"|0d 0a|Host|0d 0a|Hostname|0d 0a|Connection|0d 0a 0d 0a|"; bsize:32; fast_pattern;
http.connection;
content:"close"; bsize:5;
Raw source ET MALWARE SnappyTCP Reverse Shell Client Checkin M2 · 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 SnappyTCP Reverse Shell Client Checkin M2";
    flow:established,to_server;
    http.request_line;
    content:"GET|20 2f|ssl|2e|php|20|HTTP|2f|1|2e|1"; bsize:21;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Hostname|0d 0a|Connection|0d 0a 0d 0a|"; bsize:32; fast_pattern;
    http.connection;
    content:"close"; bsize:5;
    reference:url,pwc.com/gx/en/issues/cybersecurity/cyber-threat-intelligence/tortoise-and-malwahare.html;
    classtype:trojan-activity;
    sid:2049529; rev:1;
    metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2023_12_06, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_06;
)

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