ET MALWARE VampireBot CnC ScreenCapture Exfil (POST)

Query · suricata

flow:established,to_server;
urilen:47;
http.method;
content:"POST";
http.uri;
content:"/api/image/"; startswith;
pcre:"/^(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})$/R";
http.request_body;
content:"form|2d|data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|screenshot|5f|"; fast_pattern;
content:".webp|0d 0a|"; distance:0;
target:src_ip;
Raw source ET MALWARE VampireBot CnC ScreenCapture Exfil (POST) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE VampireBot CnC ScreenCapture Exfil (POST)";
    flow:established,to_server;
    urilen:47;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/image/"; startswith;
    pcre:"/^(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})$/R";
    http.request_body;
    content:"form|2d|data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|screenshot|5f|"; fast_pattern;
    content:".webp|0d 0a|"; distance:0;
    reference:md5,24670706f0a2cb915fcb683ba4cf55a6;
    classtype:command-and-control;
    sid:2064738; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_09_16, deployment Perimeter, deployment SSLDecrypt, malware_family VampireBot, confidence High, signature_severity Critical, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)

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