ET MALWARE CopperStealer - Browser Stealer Exfil via Telegram

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/bot";
content:"/sendDocument"; endswith;
http.content_type;
content:"multipart|2f|form|2d|data|3b 20|boundary|3d 2d 2d 2d 2d|WebKitFormBoundaryovEAlxca0DiIz7tl"; bsize:68; fast_pattern;
http.request_body;
content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|document|22 3b 20|filename|3d 22|";
content:".zip|22 0d 0a|Content-Type: application/x-zip-compressed|0d 0a 0d 0a 37 7a bc af 27 1c|"; distance:36; within:85;
Raw source ET MALWARE CopperStealer - Browser Stealer Exfil via Telegram · 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 CopperStealer - Browser Stealer Exfil via Telegram";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/bot";
    content:"/sendDocument"; endswith;
    http.content_type;
    content:"multipart|2f|form|2d|data|3b 20|boundary|3d 2d 2d 2d 2d|WebKitFormBoundaryovEAlxca0DiIz7tl"; bsize:68; fast_pattern;
    http.request_body;
    content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|document|22 3b 20|filename|3d 22|";
    content:".zip|22 0d 0a|Content-Type: application/x-zip-compressed|0d 0a 0d 0a 37 7a bc af 27 1c|"; distance:36; within:85;
    reference:md5,2420ce50752a9c25203cecbe194606c5;
    reference:md5,04bc575585d4663f227cef14a65bea26;
    reference:url,www.trendmicro.com/en_us/research/22/f/websites-hosting-fake-cracks-spread-updated-copperstealer.html;
    classtype:trojan-activity;
    sid:2037027; rev:1;
    metadata:created_at 2022_06_17, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_17;
)

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