ET MALWARE Win32/TrojanDownloader.Agent.RFS Variant Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".bin?ver="; fast_pattern;
content:"&lip="; distance:0;
content:"&mac=";
isdataat:!13,relative;
http.user_agent;
content:"Mozilla|2f|4|2e|0|20 28|compatible|3b 20|MSIE|20|6|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|SV1|3b 20 2e|NET|20|CLR|20|2|2e|0|2e|50727|3b 29|"; bsize:76;
Raw source ET MALWARE Win32/TrojanDownloader.Agent.RFS Variant Checkin · 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 Win32/TrojanDownloader.Agent.RFS Variant Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".bin?ver="; fast_pattern;
    content:"&lip="; distance:0;
    content:"&mac=";
    isdataat:!13,relative;
    http.user_agent;
    content:"Mozilla|2f|4|2e|0|20 28|compatible|3b 20|MSIE|20|6|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|SV1|3b 20 2e|NET|20|CLR|20|2|2e|0|2e|50727|3b 29|"; bsize:76;
    reference:md5,014d2e1a31ce397e7a5e3ba8edc45344;
    classtype:trojan-activity;
    sid:2036276; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_04_20, deployment Perimeter, malware_family Win32_TrojanDownloader_Agent_RFS, performance_impact Low, confidence High, signature_severity Major, tag c2, updated_at 2022_04_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)

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