ET MALWARE SmartLoader CnC Exfil (screen.bmp)

Query · suricata

flow:established,to_server;
http.method;
content:"PUT";
http.uri;
content:"/loader/screen/"; startswith;
http.request_body;
content:"filename|3d 22|screen|2e|bmp|22 0d 0a 0d 0a 42 4d|"; fast_pattern;
content:"name|3d 22|data|22 0d 0a 0d 0a 7b 22|data|22 3a 20|";
Raw source ET MALWARE SmartLoader CnC Exfil (screen.bmp) · 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 SmartLoader CnC Exfil (screen.bmp)";
    flow:established,to_server;
    http.method;
    content:"PUT";
    http.uri;
    content:"/loader/screen/"; startswith;
    http.request_body;
    content:"filename|3d 22|screen|2e|bmp|22 0d 0a 0d 0a 42 4d|"; fast_pattern;
    content:"name|3d 22|data|22 0d 0a 0d 0a 7b 22|data|22 3a 20|";
    reference:url,community.emergingthreats.net/t/smartloader/1428;
    classtype:trojan-activity;
    sid:2051455; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_03_04, deployment Perimeter, malware_family SmartLoader, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_04;
)

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