ET MALWARE Request To Image Hosted on Archive .org With PowerShell User-Agent (Likely Stenography Payload)

Query · suricata

flow:established,to_server;
http.uri;
pcre:"/\x2e(?:png|jpg|jpeg|svg|gif|tiff)$/i";
http.user_agent;
content:"WindowsPowerShell/"; fast_pattern;
http.host;
content:"archive.org"; endswith;
target:src_ip;
Raw source ET MALWARE Request To Image Hosted on Archive .org With PowerShell User-Agent (Likely Stenography Payload) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Request To Image Hosted on Archive .org With PowerShell User-Agent (Likely Stenography Payload)";
    flow:established,to_server;
    http.uri;
    pcre:"/\x2e(?:png|jpg|jpeg|svg|gif|tiff)$/i";
    http.user_agent;
    content:"WindowsPowerShell/"; fast_pattern;
    http.host;
    content:"archive.org"; endswith;
    classtype:trojan-activity;
    sid:2063970; 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_08_12, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_12;
    target:src_ip;
)

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