121.128.135.73

Classification: Malicious

121.128.135.73 is a malicious IP address in Seongnam-si, KR. 22 sightings from 6 threat sources (Mail Spammer, HTTP Spammer), last seen 2026-10-17.

Current activity

  • Known attacker — Seen launching attacks over the Internet.

Blacklist sightings

Description Source First seen Last seen Labels MITRE ATT&CK
Mail Spammer Barracuda 2024-10-18 08:06:48 2026-10-17 16:38:52 attacker malicious-activity
HTTP Spammer StopForumSpam.com 2021-01-14 16:18:59 2021-05-27 00:03:34 malicious-activity
Mail Spammer Blocklist.de 2018-09-27 06:55:28 2021-01-25 09:14:34
IMAP Attacker Blocklist.de 2018-09-27 06:52:19 2021-01-25 09:10:22 malicious-activity
Bruteforce login attacker Blocklist.de 2017-11-02 09:13:57 2020-12-10 20:43:43 malicious-activity
HTTP Attacker Blocklist.de 2017-11-01 21:52:41 2020-12-10 20:39:53 malicious-activity
SSH Attacker Blocklist.de 2018-06-09 07:52:01 2019-12-30 07:15:52
FTP Attacker Blocklist.de 2018-08-21 06:50:42 2018-08-22 06:33:04
HTTP Spammer GPF DNS Blocklist 2018-08-13 07:56:16 2018-08-13 07:56:16
Brute force attack on site ukr-choice.com Blocklist.net.ua 2017-12-26 13:34:49 2017-12-26 13:34:49
Brute force attack on site w0.miwzua.com Blocklist.net.ua 2017-12-25 14:02:25 2017-12-25 14:02:25
Brute force attack on site paradoxprint.com.ua Blocklist.net.ua 2017-12-18 16:29:07 2017-12-18 16:29:07
Brute force attack on site zno.erudyt.net Blocklist.net.ua 2017-12-16 14:19:19 2017-12-16 14:19:19
Brute force attack on site salonsofia.com.ua Blocklist.net.ua 2017-12-14 16:16:56 2017-12-14 16:16:56
Brute force attack on site scinse.donntu.edu.ua Blocklist.net.ua 2017-11-14 13:54:49 2017-11-14 13:54:49
Malicious Host GreenSnow 2017-11-12 17:43:24 2017-11-12 17:43:24
Brute force attack on site turbiz.info Blocklist.net.ua 2017-11-12 17:14:56 2017-11-12 17:14:56
Brute force attack on site rescuero.com Blocklist.net.ua 2017-11-05 15:21:48 2017-11-05 15:21:48
Brute force attack on site farshfishandmeat.com.ua Blocklist.net.ua 2017-11-03 17:35:44 2017-11-03 17:35:44
Brute force attack on site massage-adrem.com Blocklist.net.ua 2017-11-01 19:55:36 2017-11-01 19:55:36
Brute force attack on site bowling.org.ua Blocklist.net.ua 2017-10-15 13:25:56 2017-10-15 13:25:56

Tags

abuse ssh bruteforce bot apache ddos rfi attacker login joomla wordpress ftp imap pop3 sasl mail spam

Whois information

AS name
AS4766 Korea Telecom
AS registry
apnic
AS date
2006-04-07 00:00:00
AS CIDR
121.128.0.0/13
CIDR
121.128.0.0/11
Registrant
Korea Telecom
Address
Jeollanam-do Naju-si Jinheung-gil
City
Seongnam-si
Postal code
13332
Country
KR — Korea, Republic of 🇰🇷
Contact email
[email protected], [email protected]
First indexed
2017-09-27 01:55:02
Last updated
2026-10-17 16:38:53

Malicious IPs in the same CIDR

121.131.174.48 121.132.245.34 121.129.204.41 121.134.149.89 121.128.142.27 121.132.251.50 121.130.134.57 121.128.231.14 121.128.135.73 121.128.144.28 121.132.152.80 121.128.103.44 121.131.104.45 121.130.172.46 121.134.151.223 121.130.142.9 121.135.86.196 121.128.205.162