ET TELNET busybox ECCHI hackers - Possible Brute Force Attack

Query · suricata

flow:to_server,established;
content:"ECCHI";
flowbits:isset,ET.telnet.busybox;
threshold:type limit, count 1, track by_src, seconds 30;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET TELNET busybox ECCHI hackers - Possible Brute Force Attack · 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 any -> $HOME_NET [23,2323,3323,4323] (
    msg:"ET TELNET busybox ECCHI hackers - Possible Brute Force Attack";
    flow:to_server,established;
    content:"ECCHI";
    flowbits:isset,ET.telnet.busybox;
    threshold:type limit, count 1, track by_src, seconds 30;
    reference:url,lists.emergingthreats.net/pipermail/emerging-sigs/2016-August/027524.html;
    classtype:attempted-admin;
    sid:2023304; rev:1;
    metadata:attack_target Server, created_at 2016_09_27, deployment Datacenter, performance_impact Low, confidence Medium, signature_severity Major, 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.