ET MALWARE Win32/Unknown VBScript Backdoor Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"8tLS0t"; 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;
http.user_agent;
content:"WinHttpRequest";
Raw source ET MALWARE Win32/Unknown VBScript Backdoor Activity (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/Unknown VBScript Backdoor Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"8tLS0t"; 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;
    http.user_agent;
    content:"WinHttpRequest";
    reference:url,asec.ahnlab.com/ko/37123/;
    reference:md5,e8aa5c0309cbc1966674b110a4afd83a;
    classtype:trojan-activity;
    sid:2037840; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_07_28, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_28;
)

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