ET MALWARE Win32/Common RAT Host Checkin (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?id=";
content:"&key=";
pcre:"/^(?:[0-9]{10,12})$/R";
http.user_agent;
content:"Mozilla|2f|5|2e|0|20 28|Windows|20|NT|3b 20|Windows|20|NT|20|"; startswith;
content:"WindowsPowerShell/"; fast_pattern;
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; startswith;
isdataat:!35,relative;
content:!"Referer";
Raw source ET MALWARE Win32/Common RAT Host Checkin (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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Common RAT Host Checkin (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?id=";
    content:"&key=";
    pcre:"/^(?:[0-9]{10,12})$/R";
    http.user_agent;
    content:"Mozilla|2f|5|2e|0|20 28|Windows|20|NT|3b 20|Windows|20|NT|20|"; startswith;
    content:"WindowsPowerShell/"; fast_pattern;
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; startswith;
    isdataat:!35,relative;
    content:!"Referer";
    reference:url,twitter.com/reecdeep/status/1715053326859895210;
    reference:md5,6eb9f82c1b93fa4d6a79f2c06e65f83b;
    classtype:trojan-activity;
    sid:2048662; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_10_19, deployment Perimeter, malware_family RAT, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_19, reviewed_at 2023_10_19;
)

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