ET MALWARE Win32/Backdoor.Graphon Checkin Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/api/Values_V1/AuthAsyncComplete_V1?Identity="; fast_pattern; startswith;
http.uri.raw;
content:"=%3E";
http.header_names;
content:"|0d 0a|Accept|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:30;
Raw source ET MALWARE Win32/Backdoor.Graphon Checkin 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/Backdoor.Graphon Checkin Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/api/Values_V1/AuthAsyncComplete_V1?Identity="; fast_pattern; startswith;
    http.uri.raw;
    content:"=%3E";
    http.header_names;
    content:"|0d 0a|Accept|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:30;
    reference:url,symantec-enterprise-blogs.security.com/blogs/threat-intelligence/harvester-new-apt-attacks-asia;
    reference:md5,ff81a65150e318c1ffbeaba7a56bb09f;
    classtype:command-and-control;
    sid:2034224; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_10_18, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Backdoor_Graphon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_18;
)

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