218.78.91.158

Threat LevelHIGH55/1001 rule type
1 incident on record · active attack detected · seen 12h ago
PTR N/A
Org / ASN Chinanet SH
Country 🇨🇳 China
City Shanghai, Shanghai
Timezone Asia/Shanghai
Botnet InfrastructureChinaNet (AS4134, China Telecom)
ChinaNet (AS4134) is one of the highest-volume attack-originating ASNs globally, consistently ranking in SANS/DShield top-10 attacker lists. Activity ranges from compromised consumer endpoints to dedicated scan infrastructure. SSH brute-force from this network targets common username dictionaries at scale — automated, persistent credential-harvesting botnet behavior.

Attack Analysis

SSH: Login Attempt — Non-Existent User
This IP attempted to authenticate via SSH using a username that does not exist on the system. This is characteristic of automated credential-stuffing attacks cycling through common username wordlists (admin, root, ubuntu, pi, etc.).

Reports (1)

Date Severity Description
4 Jun 2026 - 04:58 high SSH: Login attempt using non-existent user