ET MALWARE Win32/RM3Loader Server Response

Query · suricata

flow:established,to_client;
flowbits:isset,ET.rm3loader;
http.stat_code;
content:"200";
http.header;
content:"|0d 0a|Content-Disposition|3a 20|attachment|3b 20|filename=|22|frontend_front_"; fast_pattern;
content:"frontendfront"; distance:10; within:35;

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 Win32/RM3Loader Server Response · 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 Win32/RM3Loader Server Response";
    flow:established,to_client;
    flowbits:isset,ET.rm3loader;
    http.stat_code;
    content:"200";
    http.header;
    content:"|0d 0a|Content-Disposition|3a 20|attachment|3b 20|filename=|22|frontend_front_"; fast_pattern;
    content:"frontendfront"; distance:10; within:35;
    reference:md5,aaef17d68339c7f2f19fb780ab90e156;
    classtype:trojan-activity;
    sid:2039130; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_10_07, deployment Perimeter, deployment SSLDecrypt, malware_family ursnif, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_07;
)

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