ET MALWARE Clipsa Stealer - Exfiltration Activity

Query · suricata

flow:established,to_server;
threshold:type limit, track by_src, count 1, seconds 30;
http.method;
content:"POST";
http.uri;
content:"/wp-content/plugins/WPSecurity/up.php"; depth:37; fast_pattern; endswith;
http.request_body;
content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|uploadfile|22 3b 20|filename|3d 22|";
content:".bin|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a|"; distance:18; within:47;
http.content_type;
content:"multipart/form-data|3b|";
Raw source ET MALWARE Clipsa Stealer - Exfiltration Activity · 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 Clipsa Stealer - Exfiltration Activity";
    flow:established,to_server;
    threshold:type limit, track by_src, count 1, seconds 30;
    http.method;
    content:"POST";
    http.uri;
    content:"/wp-content/plugins/WPSecurity/up.php"; depth:37; fast_pattern; endswith;
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|uploadfile|22 3b 20|filename|3d 22|";
    content:".bin|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a|"; distance:18; within:47;
    http.content_type;
    content:"multipart/form-data|3b|";
    reference:md5,7e52633ffa2c3aee03e8b26f03e07cc4;
    reference:url,decoded.avast.io/janrubin/clipsa-multipurpose-password-stealer/;
    classtype:trojan-activity;
    sid:2027895; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_16, deployment Perimeter, malware_family Clipsa, performance_impact Low, confidence High, signature_severity Major, tag Stealer, updated_at 2020_09_17;
)

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