ET MALWARE Win32/StreamFlaw.A Checkin

Query · suricata

flow:established,to_server;
urilen:1;
http.method;
content:"POST";
http.user_agent;
content:"Mozilla/6.0 (compatible|3b 20|MSIE 6.0"; fast_pattern; startswith;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Win32/StreamFlaw.A Checkin · 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 Win32/StreamFlaw.A Checkin";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"POST";
    http.user_agent;
    content:"Mozilla/6.0 (compatible|3b 20|MSIE 6.0"; fast_pattern; startswith;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,981672cd969fe8cb1f887d0526b1ecf2;
    classtype:command-and-control;
    sid:2020947; rev:4;
    metadata:created_at 2015_04_18, malware_family Win32_StreamFlaw_A, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_04;
)

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