ET MALWARE JS/WSF Downloader Dec 08 2016 M6

Query · suricata

flow:from_server,established;
flowbits:isset,et.IE7.NoRef.NoCookie;
http.header;
pcre:"/Content-Disposition\x3a[^\r\n]+=[\x22\x27]?[a-z]?\d{1,3}(?:\.dat)?[\x22\x27]?\r\n/mi";
file.data;
content:"MZ"; within:2;
byte_jump:4,58,relative,little;
content:"PE|00 00|"; fast_pattern; distance:-64; within:4;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE JS/WSF Downloader Dec 08 2016 M6 · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE JS/WSF Downloader Dec 08 2016 M6";
    flow:from_server,established;
    flowbits:isset,et.IE7.NoRef.NoCookie;
    http.header;
    pcre:"/Content-Disposition\x3a[^\r\n]+=[\x22\x27]?[a-z]?\d{1,3}(?:\.dat)?[\x22\x27]?\r\n/mi";
    file.data;
    content:"MZ"; within:2;
    byte_jump:4,58,relative,little;
    content:"PE|00 00|"; fast_pattern; distance:-64; within:4;
    classtype:trojan-activity;
    sid:2023679; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_23, deployment Perimeter, malware_family Trojan_Kwampirs, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_12_11;
)

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