ET MALWARE Linux.Mumblehard Spam Command CnC

Query · suricata

flow:to_server,established;
content:"POST / HTTP/1."; depth:14;
content:"|0d 0a 0d 0a 0f 0f|";
pcre:"/^\d{1,3}[0-2]/R";
Raw source ET MALWARE Linux.Mumblehard Spam Command CnC · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET 25 (
    msg:"ET MALWARE Linux.Mumblehard Spam Command CnC";
    flow:to_server,established;
    content:"POST / HTTP/1."; depth:14;
    content:"|0d 0a 0d 0a 0f 0f|";
    pcre:"/^\d{1,3}[0-2]/R";
    reference:url,www.welivesecurity.com/wp-content/uploads/2015/04/mumblehard.pdf;
    reference:md5,86f0b0b74fe8b95b163a1b31d76f7917;
    classtype:command-and-control;
    sid:2021053; rev:1;
    metadata:created_at 2015_05_04, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.