ET WEB_CLIENT Tech Support Phone Scam Landing M1 Oct 16 2016

Query · suricata

flow:from_server,established;
http.stat_code;
content:"401";
http.header;
content:"WWW-Authenticate|3a 20|Basic realm="; nocase;
content:"Error"; nocase; distance:0; fast_pattern;
content:"-"; distance:0;
pcre:"/^WWW-Authenticate\x3a\x20Basic\x20realm=[\x22\x27][^\r\n]*Error[^\r\n]*-/mi";
Raw source ET WEB_CLIENT Tech Support Phone Scam Landing M1 Oct 16 2016 · Suricata
Esc
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 WEB_CLIENT Tech Support Phone Scam Landing M1 Oct 16 2016";
    flow:from_server,established;
    http.stat_code;
    content:"401";
    http.header;
    content:"WWW-Authenticate|3a 20|Basic realm="; nocase;
    content:"Error"; nocase; distance:0; fast_pattern;
    content:"-"; distance:0;
    pcre:"/^WWW-Authenticate\x3a\x20Basic\x20realm=[\x22\x27][^\r\n]*Error[^\r\n]*-/mi";
    classtype:social-engineering;
    sid:2024844; rev:5;
    metadata:created_at 2017_10_16, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_01;
)

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