GPL CHAT MSN outbound file transfer rejected

Query · suricata

flow:established;
content:"MSG "; depth:4;
content:"Content-Type|3A| application/x-msnmsgrp2p"; distance:0; nocase;
content:"MSNSLP/1.0 603 Decline"; distance:0; nocase;
Raw source GPL CHAT MSN outbound file transfer rejected · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET 1863 -> $HOME_NET any (
    msg:"GPL CHAT MSN outbound file transfer rejected";
    flow:established;
    content:"MSG "; depth:4;
    content:"Content-Type|3A| application/x-msnmsgrp2p"; distance:0; nocase;
    content:"MSNSLP/1.0 603 Decline"; distance:0; nocase;
    classtype:policy-violation;
    sid:2101989; rev:7;
    metadata:created_at 2010_09_23, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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