ET MALWARE Bazaloader Variant Activity

Query · suricata

flow:established,to_server;
http.method;
content:"HEAD";
http.uri;
content:"/act/resume"; bsize:11;
http.header;
content:"Update|3a 20|/act/resume|0d 0a|"; fast_pattern;
http.header_names;
content:!"Referer";
content:!"User-Agent";
content:!"Accept";
Raw source ET MALWARE Bazaloader Variant 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Bazaloader Variant Activity";
    flow:established,to_server;
    http.method;
    content:"HEAD";
    http.uri;
    content:"/act/resume"; bsize:11;
    http.header;
    content:"Update|3a 20|/act/resume|0d 0a|"; fast_pattern;
    http.header_names;
    content:!"Referer";
    content:!"User-Agent";
    content:!"Accept";
    reference:url,twitter.com/James_inthe_box/status/1319298609255383040;
    classtype:trojan-activity;
    sid:2031085; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2020_10_22, deployment Perimeter, deployment SSLDecrypt, malware_family BazaLoader, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_22;
)

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