ET MALWARE Possible Malicious Macro DL EXE Feb 2016 (WinHTTPRequest)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".exe"; nocase; fast_pattern;
pcre:"/(?:\/(?:(?:p(?:lugins\/content\/vote\/\.ssl\/[a-z0-9]|a(?:nel\/includes\/[^\x2f]+|tric)|osts?\/[a-z0-9]+|rogcicicic)|s(?:ystem\/(?:logs|engine)\/[^\x2f]+?|e(?:rv(?:au|er)|ct)|gau\/.*?|alam|ucks|can|ke)|(?=[a-z]*[0-9])(?=[0-9]*[a-z])(?!setup\d+\.exe$)[a-z0-9]{5,10}|a(?:d(?:min\/images\/\w+|obe)|salam|live|us)|m(?:edia\/files\/\w+|a(?:cros?|rch)|soffice)|d(?:o(?:c(?:\/[a-z0-9]+)?|ne)|bust)|(?:~.+?\/\.[^\x2f]+|\.css)\/.+?|in(?:voice\/[^\x2f]+|fos?)|c(?:onfig|hris|alc)|u(?:swinz\w+|pdate)|xml\/load\/[^\x2f]+|(?:[Dd]ocumen|ve)t|Ozonecrytedserver|w(?:or[dk]|insys)|t(?:mp\/.+?|est)|fa(?:cture|soo)|n(?:otepad|ach)|k(?:be|ey|is)|ArfBtxz|office|yhaooo|[a-z]|etna|link|\d+)\.exe$|(?:(?=[a-z0-9]*?[3456789][a-z0-9]*?[3456789])(?=[a-z0-9]*?[h-z])[a-z0-9]{3,31}\+|PasswordRecovery|RemoveWAT|Dejdisc|Host\d+|Msword)\.exe)|(?:^\/(?:image\/.+?\/[^\x2f]+|x\/setup)|keem)\.exe$)/i";
http.header;
content:"WinHttp.WinHttpRequest.";
http.host;
content:!"download.nai.com";
Raw source ET MALWARE Possible Malicious Macro DL EXE Feb 2016 (WinHTTPRequest) · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Possible Malicious Macro DL EXE Feb 2016 (WinHTTPRequest)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".exe"; nocase; fast_pattern;
    pcre:"/(?:\/(?:(?:p(?:lugins\/content\/vote\/\.ssl\/[a-z0-9]|a(?:nel\/includes\/[^\x2f]+|tric)|osts?\/[a-z0-9]+|rogcicicic)|s(?:ystem\/(?:logs|engine)\/[^\x2f]+?|e(?:rv(?:au|er)|ct)|gau\/.*?|alam|ucks|can|ke)|(?=[a-z]*[0-9])(?=[0-9]*[a-z])(?!setup\d+\.exe$)[a-z0-9]{5,10}|a(?:d(?:min\/images\/\w+|obe)|salam|live|us)|m(?:edia\/files\/\w+|a(?:cros?|rch)|soffice)|d(?:o(?:c(?:\/[a-z0-9]+)?|ne)|bust)|(?:~.+?\/\.[^\x2f]+|\.css)\/.+?|in(?:voice\/[^\x2f]+|fos?)|c(?:onfig|hris|alc)|u(?:swinz\w+|pdate)|xml\/load\/[^\x2f]+|(?:[Dd]ocumen|ve)t|Ozonecrytedserver|w(?:or[dk]|insys)|t(?:mp\/.+?|est)|fa(?:cture|soo)|n(?:otepad|ach)|k(?:be|ey|is)|ArfBtxz|office|yhaooo|[a-z]|etna|link|\d+)\.exe$|(?:(?=[a-z0-9]*?[3456789][a-z0-9]*?[3456789])(?=[a-z0-9]*?[h-z])[a-z0-9]{3,31}\+|PasswordRecovery|RemoveWAT|Dejdisc|Host\d+|Msword)\.exe)|(?:^\/(?:image\/.+?\/[^\x2f]+|x\/setup)|keem)\.exe$)/i";
    http.header;
    content:"WinHttp.WinHttpRequest.";
    http.host;
    content:!"download.nai.com";
    classtype:trojan-activity;
    sid:2022658; rev:8;
    metadata:created_at 2016_03_24, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_19, reviewed_at 2024_04_16;
)

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