ET MALWARE FoggyWeb Backdoor Incoming Request (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/adfs/portal/images/theme/light01/"; startswith;
content:".webp"; endswith;
Raw source ET MALWARE FoggyWeb Backdoor Incoming Request (GET) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE FoggyWeb Backdoor Incoming Request (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/adfs/portal/images/theme/light01/"; startswith;
    content:".webp"; endswith;
    reference:url,www.microsoft.com/security/blog/2021/09/27/foggyweb-targeted-nobelium-malware-leads-to-persistent-backdoor;
    classtype:command-and-control;
    sid:2034034; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Server, created_at 2021_09_28, deployment Perimeter, deployment Internal, deployment SSLDecrypt, malware_family FoggyWeb, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_28;
)

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