ET MALWARE Possible Win32/SysJoker Retrieving CnC Information (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/uc?id="; startswith;
http.content_type;
content:"application/x-www-form-urlencoded"; bsize:33;
http.user_agent;
content:"WinHttpClient"; bsize:13;
http.content_len;
byte_test:0,=,0,0,string,dec;
http.header_names;
content:!"Referer";
http.host;
content:"drive.google.com"; fast_pattern; bsize:16;
Raw source ET MALWARE Possible Win32/SysJoker Retrieving CnC Information (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 Possible Win32/SysJoker Retrieving CnC Information (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/uc?id="; startswith;
    http.content_type;
    content:"application/x-www-form-urlencoded"; bsize:33;
    http.user_agent;
    content:"WinHttpClient"; bsize:13;
    http.content_len;
    byte_test:0,=,0,0,string,dec;
    http.header_names;
    content:!"Referer";
    http.host;
    content:"drive.google.com"; fast_pattern; bsize:16;
    reference:md5,53f1bb23f670d331c9041748e7e8e396;
    reference:url,www.intezer.com/blog/malware-analysis/new-backdoor-sysjoker/;
    classtype:trojan-activity;
    sid:2034922; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_01_14, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_14;
)

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