TCP SYN packets sent to port 110 POP3 and dropped by firewall. At least 60 packets seen in past 24 ...
show moreTCP SYN packets sent to port 110 POP3 and dropped by firewall. At least 60 packets seen in past 24 hours
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Spam email (duplicated):
Received: from imgmailin.store (unknown [45.11.26.182])
From: WINNER
S ...
show moreSpam email (duplicated):
Received: from imgmailin.store (unknown [45.11.26.182])
From: WINNER
Subject: YOUR ARE THE WINNER OF NEW VW GOLF!!!!
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May 9 07:45:27 mail postfix/smtpd[31918]: warning: unknown[85.208.136.44]: SASL PLAIN authenticatio ...
show moreMay 9 07:45:27 mail postfix/smtpd[31918]: warning: unknown[85.208.136.44]: SASL PLAIN authentication failed: authentication failure
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Unauthorised attempt to log on to smtp port 25
May 9 00:57:16 mail postfix/smtpd[7161]: Anonymou ...
show moreUnauthorised attempt to log on to smtp port 25
May 9 00:57:16 mail postfix/smtpd[7161]: Anonymous TLS connection established from unknown[101.205.25.59]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
May 9 00:57:22 mail postfix/smtpd[7161]: warning: unknown[101.205.25.59]: SASL LOGIN authentication failed: authentication failure
May 9 00:57:23 mail postfix/smtpd[7161]: lost connection after AUTH from unknown[101.205.25.59]
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Attempted unauthorised login on port 25 SMTP
May 9 00:56:49 mail postfix/smtpd[7161]: connect fr ...
show moreAttempted unauthorised login on port 25 SMTP
May 9 00:56:49 mail postfix/smtpd[7161]: connect from unknown[186.239.192.34]
May 9 00:56:55 mail postfix/smtpd[7161]: Anonymous TLS connection established from unknown[186.239.192.34]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
May 9 00:57:01 mail postfix/smtpd[7161]: warning: unknown[186.239.192.34]: SASL LOGIN authentication failed: authentication failure
May 9 00:57:02 mail postfix/smtpd[7161]: lost connection after AUTH from unknown[186.239.192.34]
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Has sent a TCP SYN packet, about 5 times a day for at least five days, addressed to port 3389
Exa ...
show moreHas sent a TCP SYN packet, about 5 times a day for at least five days, addressed to port 3389
Example:
May 8 09:07:50 kernel: [107561.263730] DROP IN=enp5s0 OUT= MAC=00:13:3b:0f:02:ae:20:b0:01:bc:01:52:08:00 SRC=183.131.43.242 DST=192.168.1.2 LEN=44 TOS=0x00 PREC=0x00 TTL=238 ID=11816 PROTO=TCP SPT=44304 DPT=3389 WINDOW=1024 RES=0x00 SYN URGP=0
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Has sent a TCP SYN packet, about 5 times a day for at least 5 days, addressed to port 3389
Exampl ...
show moreHas sent a TCP SYN packet, about 5 times a day for at least 5 days, addressed to port 3389
Example:
May 8 09:29:14 foxtree-firewall kernel: [108845.162406] DROP IN=enp5s0 OUT= MAC=00:13:3b:0f:02:ae:20:b0:01:bc:01:52:08:00 SRC=203.167.14.57 DST=192.168.1.2 LEN=44 TOS=0x00 PREC=0x00 TTL=238 ID=57137 PROTO=TCP SPT=48444 DPT=3389 WINDOW=1024 RES=0x00 SYN URGP=0
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Attempt to use my host as SMTP relay. Logs show a from address such as security@[mydomain], so spoof ...
show moreAttempt to use my host as SMTP relay. Logs show a from address such as security@[mydomain], so spoofing an address in my domain. Three times in 5 days.
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TCP SYN packets for assorted ports, e.g. 3393, 1234, 3396, 9833, 65000,... At least 120 attempts ov ...
show moreTCP SYN packets for assorted ports, e.g. 3393, 1234, 3396, 9833, 65000,... At least 120 attempts over 7 days.
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Approximately 1300 unauthorised attempts to authenticate as the same user in about 90 minutes.
Ex ...
show moreApproximately 1300 unauthorised attempts to authenticate as the same user in about 90 minutes.
Example log extract:
...
May 4 16:15:25 mail postfix/smtpd[18052]: connect from unknown[141.98.6.150]
May 4 16:15:25 mail postfix/smtpd[18052]: Anonymous TLS connection established from unknown[141.98.6.150]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
May 4 16:15:25 mail postfix/smtpd[18052]: warning: unknown[141.98.6.150]: SASL LOGIN authentication failed: authentication failure
May 4 16:15:25 mail postfix/smtpd[18052]: lost connection after AUTH from unknown[141.98.6.150]
May 4 16:15:25 mail postfix/smtpd[18052]: disconnect from unknown[141.98.6.150] ehlo=2 starttls=1 auth=0/1 commands=3/4
...
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Unauthorised attempt to log in to SMTP port 25.
May 3 20:57:43 mail postfix/smtpd[1663]: warning ...
show moreUnauthorised attempt to log in to SMTP port 25.
May 3 20:57:43 mail postfix/smtpd[1663]: warning: unknown[181.214.218.43]: SASL PLAIN authentication failed: authentication failure
May 3 20:57:43 mail postfix/smtpd[1663]: warning: unknown[181.214.218.43]: SASL LOGIN authentication failed: authentication failure
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Multiple spam e-mail messages, from domains such as laddersurvey.bio and trying to persuade the vict ...
show moreMultiple spam e-mail messages, from domains such as laddersurvey.bio and trying to persuade the victim to visit sites such as www.topplesailor.za.com
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Multiple similarly formatted spam messages purporting to come from different domains in the .bio TLD ...
show moreMultiple similarly formatted spam messages purporting to come from different domains in the .bio TLD.
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Spam received from 185.222.58.100. Subject: "PAYMENT SWIFT COPY"
Eset NOD32 reports the Zip attach ...
show moreSpam received from 185.222.58.100. Subject: "PAYMENT SWIFT COPY"
Eset NOD32 reports the Zip attachment contains a trojan, a variant of MSIL/GenKryptik.GFJQ
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Email SpamHacking
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