ET MALWARE PurpleFox Backdoor/Rootkit Download Server Response M1

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
http.content_type;
content:"application/octet-stream"; bsize:24;
http.server;
content:"HFS|20|"; startswith;
http.cookie;
content:"HFS_SID_="; startswith;
http.response_body;
content:"Rar!|1a 07 01 00|"; startswith;
content:"rundll3222.exe"; within:150; fast_pattern;
Raw source ET MALWARE PurpleFox Backdoor/Rootkit Download Server Response M1 · 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 PurpleFox Backdoor/Rootkit Download Server Response M1";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"application/octet-stream"; bsize:24;
    http.server;
    content:"HFS|20|"; startswith;
    http.cookie;
    content:"HFS_SID_="; startswith;
    http.response_body;
    content:"Rar!|1a 07 01 00|"; startswith;
    content:"rundll3222.exe"; within:150; fast_pattern;
    reference:url,blog.minerva-labs.com/malicious-telegram-installer-drops-purple-fox-rootkit;
    classtype:trojan-activity;
    sid:2034856; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_01_05, deployment Perimeter, malware_family PurpleFox, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_05;
)

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