Continued attempts to guess one specific user's password.
[27/Jun/2023 02:32:48] SMTP: Invalid pass ...
show moreContinued attempts to guess one specific user's password.
[27/Jun/2023 02:32:48] SMTP: Invalid password for user [snipped]@[snipped].com.au. Attempt from IP address 45.144.138.250.
[27/Jun/2023 02:32:54] Failed SMTP login from 45.144.138.250 with SASL method LOGIN.
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Repeated attempts to guess password for a single account, over a 24 hour period eg:
[19/Jun/2023 09 ...
show moreRepeated attempts to guess password for a single account, over a 24 hour period eg:
[19/Jun/2023 09:36:25] SMTP: User 3cregister@[snipped] doesn't exist. Attempt from IP address 80.94.92.36.
[19/Jun/2023 09:36:31] Failed SMTP login from 80.94.92.36 with SASL method LOGIN.
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Repeated attempts to login via SMTP with various username:password combinations, at the rate of one ...
show moreRepeated attempts to login via SMTP with various username:password combinations, at the rate of one attempt every 2 mins (approx)
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Trying to login with various username:password combinations, at the rate of one attempt every 8.5 mi ...
show moreTrying to login with various username:password combinations, at the rate of one attempt every 8.5 minutes
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Attempt to Relay
[24/Feb/2023 16:57 UTC+8] Relay attempt from IP address 35.221.54.215, mail from ...
show moreAttempt to Relay
[24/Feb/2023 16:57 UTC+8] Relay attempt from IP address 35.221.54.215, mail from <[email protected]> to <[email protected]> rejected
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Unwanted email sent to honeypot address
[24/Feb/2023 14:01 UTC+8] IP address 212.87.204.139 found i ...
show moreUnwanted email sent to honeypot address
[24/Feb/2023 14:01 UTC+8] IP address 212.87.204.139 found in DNS blacklist SpamCop, mail from <[email protected]> to <[xxx]@[xxx].com.au> rejected
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Trying to send emails masquerading as the Australian Tax Office
[24/Jan/2023 19:01 UTC] SPF check f ...
show moreTrying to send emails masquerading as the Australian Tax Office
[24/Jan/2023 19:01 UTC] SPF check failed: The IP address '185.169.2.177' is not in permitted set for sender '[email protected]' (FAIL)
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[17/Jan/2023 14:03] Attempt to deliver to unknown recipient [ honey trap address ], from <hannibal15 ...
show more[17/Jan/2023 14:03] Attempt to deliver to unknown recipient [ honey trap address ], from <[email protected]>, IP address 38.79.141.18
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Attempt to relay, followed by attempts to guess user passwords. eg:
[13/Jan/2023 07:51:xx UTC+8] SM ...
show moreAttempt to relay, followed by attempts to guess user passwords. eg:
[13/Jan/2023 07:51:xx UTC+8] SMTP: Invalid password for user [snip]. Attempt from IP address 194.87.200.138
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[11/Jan/2023 01:20:42 UTC+8] Attempt to deliver to unknown recipient [snip] IP address 69.174.103.14 ...
show more[11/Jan/2023 01:20:42 UTC+8] Attempt to deliver to unknown recipient [snip] IP address 69.174.103.141
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Constant attempts to brute force a user's account via SMTP
[05/Dec/2022 11:51:37] SMTP: Invalid pas ...
show moreConstant attempts to brute force a user's account via SMTP
[05/Dec/2022 11:51:37] SMTP: Invalid password for user [redacted].com.au. Attempt from IP address 109.206.243.169.
[05/Dec/2022 11:51:37] SMTP: Invalid password for user [redacted].com.au. Attempt from IP address 109.206.243.169.
[05/Dec/2022 11:51:43] Failed SMTP login from 109.206.243.169 with SASL method LOGIN.
[05/Dec/2022 11:51:43] Failed SMTP login from 109.206.243.169 with SASL method LOGIN.
Time stamps are in UTC+8
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Brute force login attempts into TCP port 25
eg:
[03/Aug/2022 03:13:35] SMTP: User letmein@[snip] ...
show moreBrute force login attempts into TCP port 25
eg:
[03/Aug/2022 03:13:35] SMTP: User letmein@[snip].com.au doesn't exist. Attempt from IP address 37.139.129.14.
[03/Aug/2022 03:13:41] Failed SMTP login from 37.139.129.14 with SASL method LOGIN.
[03/Aug/2022 03:13:41] SMTP server connection from 37.139.129.14 closed after 2 bad commands
[03/Aug/2022 03:28:25] SMTP: User xerox@[snip].com.au doesn't exist. Attempt from IP address 37.139.129.14.
[03/Aug/2022 03:28:31] Failed SMTP login from 37.139.129.14 with SASL method LOGIN.
[03/Aug/2022 03:28:32] SMTP: User xerox@[snip].com.au doesn't exist. Attempt from IP address 37.139.129.14.
[03/Aug/2022 03:28:38] Failed SMTP login from 37.139.129.14 with SASL method LOGIN.
[03/Aug/2022 03:28:38] SMTP server connection from 37.139.129.14 closed after 2 bad commands
[03/Aug/2022 03:43:16] SMTP: User mail@[snip].com.au doesn't exist. Attempt from IP address 37.139.129.14.
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Brute-Force
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