ET MALWARE Linux/SSHDoor.A Reporting Backdoor CnC Beacon

Query · suricata

flow:established,to_server;
http.uri;
content:"port=";
pcre:"/^[0-9]{1,3}\x2E[0-9]{1,3}\x2E[0-9]{1,3}\x2E[0-9]{1,3}\x3A[0-9]{1,5}/R";
content:"|3A|";
content:"&uname=";
Raw source ET MALWARE Linux/SSHDoor.A Reporting Backdoor CnC Beacon · 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 Linux/SSHDoor.A Reporting Backdoor CnC Beacon";
    flow:established,to_server;
    http.uri;
    content:"port=";
    pcre:"/^[0-9]{1,3}\x2E[0-9]{1,3}\x2E[0-9]{1,3}\x2E[0-9]{1,3}\x3A[0-9]{1,5}/R";
    content:"|3A|";
    content:"&uname=";
    reference:url,blog.eset.com/2013/01/24/linux-sshdoor-a-backdoored-ssh-daemon-that-steals-passwords;
    classtype:command-and-control;
    sid:2016314; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2013_01_30, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_04_23, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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.