ET EXPLOIT_KIT Powershell Download Command Observed within Flash File - Probable EK Activity

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
http.content_type;
content:"application/x-shockwave-flash";
file.data;
content:"cmd.exe /c powershell"; fast_pattern;
content:"DownloadFile("; nocase; within:100;
Raw source ET EXPLOIT_KIT Powershell Download Command Observed within Flash File - Probable EK 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT_KIT Powershell Download Command Observed within Flash File - Probable EK Activity";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"application/x-shockwave-flash";
    file.data;
    content:"cmd.exe /c powershell"; fast_pattern;
    content:"DownloadFile("; nocase; within:100;
    classtype:exploit-kit;
    sid:2028941; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_05, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_30;
)

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