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๐ง๐ท
ICS Labs
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ICS Labs identified 2.135.52.73 as a malicious indicator from threat intelligence.
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Hacking
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๐ฎ๐ณ
evicky2002
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Confirmed malicious by STILWaters CTI platform (score=100, sources=1)
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Hacking
Brute-Force
SSH
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๐ง๐ท
ICS Labs
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ICS Labs identified 2.135.52.73 as a malicious indicator from threat intelligence.
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Hacking
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๐ซ๐ท
SpaceHost-Server
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Brute-Force
Web App Attack
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๐ซ๐ท
SpaceHost-Server
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Brute-Force
Web App Attack
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๐ฉ๐ช
Paul Smith
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Email Auth Brute force attack 8/8 in last day
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Brute-Force
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๐ง๐ช
madeit
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Spoofing
Email Spam
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๐บ๐ธ
chrisj
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2026-05-13T09:50:16.174412+00:00 aws postfix/smtps/smtpd[354549]: warning: 2.135.52.73.dynamic.telec ...
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2026-05-13T09:50:16.174412+00:00 aws postfix/smtps/smtpd[354549]: warning: 2.135.52.73.dynamic.telecom.kz[2.135.52.73]: SASL LOGIN authentication failed: (reason unavailable), [email protected]
2026-05-13T09:50:16.174827+00:00 aws postfix/smtps/smtpd[354549]: lost connection after AUTH from 2.135.52.73.dynamic.telecom.kz[2.135.52.73]
2026-05-13T09:50:16.175094+00:00 aws postfix/smtps/smtpd[354549]: disconnect from 2.135.52.73.dynamic.telecom.kz[2.135.52.73] ehlo=1 auth=0/1 commands=1/2
...
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Brute-Force
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๐ฉ๐ช
dn-systems.net
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2026-05-13 08:02:10.225 [7215] login authenticator failed for 2.135.52.73.dynamic.telecom.kz ([59.37 ...
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2026-05-13 08:02:10.225 [7215] login authenticator failed for 2.135.52.73.dynamic.telecom.kz ([59.37.13.66]) [2.135.52.73]:59177 I=[193.108.181.150]:25 Ci=7215: 535 Incorrect authentication data ([email protected])
2026-05-13 09:22:09.020 [8313] login authenticator failed for 2.135.52.73.dynamic.telecom.kz (ip-199-102-107-147.hosts.zerolag.com) [2.135.52.73]:47176 I=[193.108.181.150]:25 Ci=8313: 535 Incorrect authentication data ([email protected])
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Brute-Force
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๐ซ๐ท
dwmp
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May 13 09:01:10 plesk postfix/smtpd[3375472]: NOQUEUE: reject: RCPT from 2.135.52.73.dynamic.telecom ...
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May 13 09:01:10 plesk postfix/smtpd[3375472]: NOQUEUE: reject: RCPT from 2.135.52.73.dynamic.telecom.kz[2.135.52.73]: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<dynamic-adsl.movitel.co.mz>
May 13 09:01:10 plesk postfix/smtpd[3375472]: 4A34B1A672AA: reject: RCPT from 2.135.52.73.dynamic.telecom.kz[2.135.52.73]: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<dynamic-adsl.movitel.co.mz>
May 13 09:01:10 plesk postfix/smtpd[3375472]: 4A34B1A672AA: reject: RCPT from 2.135.52.73.dynamic.telecom.kz[2.135.52.73]: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table; from=<p8r1hbfc0
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Brute-Force
SSH
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Anonymous
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2026-05-13T08:23:49.122223+02:00 host postfix/smtpd[2838504]: warning: 2.135.52.73.dynamic.telecom.k ...
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2026-05-13T08:23:49.122223+02:00 host postfix/smtpd[2838504]: warning: 2.135.52.73.dynamic.telecom.kz[2.135.52.73]: SASL LOGIN authentication failed: authentication failure, [email protected]
2026-05-13T08:23:49.985738+02:00 host postfix/smtpd[2838504]: lost connection after AUTH from 2.135.52.73.dynamic.telecom.kz[2.135.52.73]
2026-05-13T08:23:49.985838+02:00 host postfix/smtpd[2838504]: disconnect from 2.135.52.73.dynamic.telecom.kz[2.135.52.73] ehlo=1 auth=0/1 commands=1/2
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Brute-Force
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๐ต๐ฑ
bmino.pl
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Autoban IP(2): 2.135.52.73 - Hostname: JSC Kazakhtelecom - City: Astana - Region: Astana - Country: ...
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Autoban IP(2): 2.135.52.73 - Hostname: JSC Kazakhtelecom - City: Astana - Region: Astana - Country: Kazakhstan - Location: 51.1876,71.4491 - Organization: Kazakhtelecom Data Network Administration - failed attempts.
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Brute-Force
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๐ฉ๐ช
kreativstrecke
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2026-05-13T05:09:48.449418+01:00 srv03 postfix/smtps/smtpd[920280]: warning: 2.135.52.73.dynamic.tel ...
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2026-05-13T05:09:48.449418+01:00 srv03 postfix/smtps/smtpd[920280]: warning: 2.135.52.73.dynamic.telecom.kz[2.135.52.73]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=hostmaster
2026-05-13T05:09:49.233461+01:00 srv03 postfix/smtps/smtpd[920280]: lost connection after AUTH from 2.135.52.73.dynamic.telecom.kz[2.135.52.73]
2026-05-13T05:09:49.233851+01:00 srv03 postfix/smtps/smtpd[920280]: disconnect from 2.135.52.73.dynamic.telecom.kz[2.135.52.73] ehlo=1 auth=0/1 commands=1/2
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Brute-Force
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Anonymous
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2026-05-13T05:08:47.242542 biopolis.pcconsultant.it postfix/smtpd[1329103]: warning: 2.135.52.73.dyn ...
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2026-05-13T05:08:47.242542 biopolis.pcconsultant.it postfix/smtpd[1329103]: warning: 2.135.52.73.dynamic.telecom.kz[2.135.52.73]: SASL LOGIN authentication failed: authentication failure, [email protected]
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Brute-Force
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Anonymous
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SMTP brute force - auth failed
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Brute-Force
Exploited Host
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