Account compromised impossibile to stop spam
Posted: Wed Sep 19, 2018 10:08 am
Hi there,
I have a strange problem with my zimbra server:
zimbra@mail:~$ zmcontrol -v
Release 8.8.9.GA.3019.UBUNTU16.64 UBUNTU16_64 FOSS edition, Patch 8.8.9_P4.
Installed on Ubuntu Linux 16.04 updated and upgraded
zimbra@mail:~$ cat /etc/*-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.5 LTS"
NAME="Ubuntu"
VERSION="16.04.5 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.5 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial
Now the problem: I use a gateway server as a smarthost for all email inbound and outbounb.
I've noticed a unusual activity regarding my account (I'm Francesco :O). I see a lot of spam mail from my account. Thinking about a compromised password I have changed status of my account from active to maintenance and i have change password.
For a while everything was fine but suddenly spam activity from my address restarts. To stop it I had to block outgoing mail gateway's side as a filter.
It's impossibile that one client is infected because i've setup a new password (64 chars) from ssh and restart and never login but spam keeps going on.
It's only on my account: francesco@446.it i've tried to delete my account and create cesko@446.it and when i added francesco@446.it as alias spam keeps going on!!!
This is the evidence:
grep sasl_username /var/log/mail.log
Sep 19 09:32:52 mail postfix/smtps/smtpd[14967]: 63F0860379: client=unknown[191.53.201.152], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:27 mail postfix/smtps/smtpd[20122]: 8D5D960379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:28 mail postfix/smtps/smtpd[20122]: 42B916037A: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:28 mail postfix/smtps/smtpd[20122]: D101860379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:29 mail postfix/smtps/smtpd[20122]: 562676037A: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:29 mail postfix/smtps/smtpd[20122]: BC35560379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:30 mail postfix/smtps/smtpd[20122]: 485A36037A: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:30 mail postfix/smtps/smtpd[20122]: EE2B360379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:31 mail postfix/smtps/smtpd[20122]: 896886037A: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:32 mail postfix/smtps/smtpd[20122]: 2FC6860379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:32 mail postfix/smtps/smtpd[20122]: CCB0E60379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:01 mail postfix/smtps/smtpd[21979]: 56D7B60379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:04 mail postfix/smtps/smtpd[21979]: 3CD4060379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:06 mail postfix/smtps/smtpd[21979]: 934EF60379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:09 mail postfix/smtps/smtpd[21979]: 1F81D60379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:11 mail postfix/smtps/smtpd[21979]: 7BFB960379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:13 mail postfix/smtps/smtpd[21979]: E0CB060379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:16 mail postfix/smtps/smtpd[21979]: 3672E60379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:19 mail postfix/smtps/smtpd[21979]: 8063060379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:22 mail postfix/smtps/smtpd[21979]: 4191660379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:24 mail postfix/smtps/smtpd[21979]: B48F860379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:40 mail postfix/smtps/smtpd[24194]: 3A17A60379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:42 mail postfix/smtps/smtpd[24194]: 8E08360379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:44 mail postfix/smtps/smtpd[24194]: E466160379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:47 mail postfix/smtps/smtpd[24194]: 5229360379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:49 mail postfix/smtps/smtpd[24194]: 9607960379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:51 mail postfix/smtps/smtpd[24194]: D5D6160379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:54 mail postfix/smtps/smtpd[24194]: 38F9760379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:56 mail postfix/smtps/smtpd[24194]: 8ADBB60379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:58 mail postfix/smtps/smtpd[24194]: E030160379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:51:01 mail postfix/smtps/smtpd[24194]: 472E160379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:06 mail postfix/smtps/smtpd[24194]: DD04D6037B: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:09 mail postfix/smtps/smtpd[24194]: CFFF460379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:12 mail postfix/smtps/smtpd[24194]: 29B9860379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:14 mail postfix/smtps/smtpd[24194]: 5E9AF60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:16 mail postfix/smtps/smtpd[24194]: BF76B60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:19 mail postfix/smtps/smtpd[24194]: 1D2C360379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:21 mail postfix/smtps/smtpd[24194]: 4EF9A60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:23 mail postfix/smtps/smtpd[24194]: 9B5A360379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:26 mail postfix/smtps/smtpd[24194]: 07AAB60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:28 mail postfix/smtps/smtpd[24194]: 3A7FB60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:41 mail postfix/smtps/smtpd[26569]: 78D7960379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:43 mail postfix/smtps/smtpd[26569]: 8D8DA60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:45 mail postfix/smtps/smtpd[26569]: A6B7260379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:47 mail postfix/smtps/smtpd[26569]: C02EC60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:49 mail postfix/smtps/smtpd[26569]: DB7A460379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:52 mail postfix/smtps/smtpd[26569]: 02A6B60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:54 mail postfix/smtps/smtpd[26569]: 1A82560379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:56 mail postfix/smtps/smtpd[26569]: 3215E60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:58 mail postfix/smtps/smtpd[26569]: 0D45E60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:56:00 mail postfix/smtps/smtpd[26569]: 2571460379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:07 mail postfix/smtps/smtpd[26569]: 2D84960379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:09 mail postfix/smtps/smtpd[26569]: CB25460379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:11 mail postfix/smtps/smtpd[26569]: F2FB160379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:14 mail postfix/smtps/smtpd[26569]: 27D7660379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:16 mail postfix/smtps/smtpd[26569]: 4ED6160379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:18 mail postfix/smtps/smtpd[26569]: 75DAA60379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:20 mail postfix/smtps/smtpd[26569]: 9DD8260379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:22 mail postfix/smtps/smtpd[26569]: C843260379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:24 mail postfix/smtps/smtpd[26569]: EFF8C60379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:27 mail postfix/smtps/smtpd[26569]: 26AC060379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Those are obviously a fraud.
How is it possibile? On the ubuntu box i have already launched rkhunter without any evidence. Admin port (7071) is firewalled.
Can you help me guys?
I have a strange problem with my zimbra server:
zimbra@mail:~$ zmcontrol -v
Release 8.8.9.GA.3019.UBUNTU16.64 UBUNTU16_64 FOSS edition, Patch 8.8.9_P4.
Installed on Ubuntu Linux 16.04 updated and upgraded
zimbra@mail:~$ cat /etc/*-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.5 LTS"
NAME="Ubuntu"
VERSION="16.04.5 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.5 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial
Now the problem: I use a gateway server as a smarthost for all email inbound and outbounb.
I've noticed a unusual activity regarding my account (I'm Francesco :O). I see a lot of spam mail from my account. Thinking about a compromised password I have changed status of my account from active to maintenance and i have change password.
For a while everything was fine but suddenly spam activity from my address restarts. To stop it I had to block outgoing mail gateway's side as a filter.
It's impossibile that one client is infected because i've setup a new password (64 chars) from ssh and restart and never login but spam keeps going on.
It's only on my account: francesco@446.it i've tried to delete my account and create cesko@446.it and when i added francesco@446.it as alias spam keeps going on!!!
This is the evidence:
grep sasl_username /var/log/mail.log
Sep 19 09:32:52 mail postfix/smtps/smtpd[14967]: 63F0860379: client=unknown[191.53.201.152], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:27 mail postfix/smtps/smtpd[20122]: 8D5D960379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:28 mail postfix/smtps/smtpd[20122]: 42B916037A: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:28 mail postfix/smtps/smtpd[20122]: D101860379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:29 mail postfix/smtps/smtpd[20122]: 562676037A: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:29 mail postfix/smtps/smtpd[20122]: BC35560379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:30 mail postfix/smtps/smtpd[20122]: 485A36037A: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:30 mail postfix/smtps/smtpd[20122]: EE2B360379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:31 mail postfix/smtps/smtpd[20122]: 896886037A: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:32 mail postfix/smtps/smtpd[20122]: 2FC6860379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:43:32 mail postfix/smtps/smtpd[20122]: CCB0E60379: client=unknown[178.219.118.250], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:01 mail postfix/smtps/smtpd[21979]: 56D7B60379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:04 mail postfix/smtps/smtpd[21979]: 3CD4060379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:06 mail postfix/smtps/smtpd[21979]: 934EF60379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:09 mail postfix/smtps/smtpd[21979]: 1F81D60379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:11 mail postfix/smtps/smtpd[21979]: 7BFB960379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:13 mail postfix/smtps/smtpd[21979]: E0CB060379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:16 mail postfix/smtps/smtpd[21979]: 3672E60379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:19 mail postfix/smtps/smtpd[21979]: 8063060379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:22 mail postfix/smtps/smtpd[21979]: 4191660379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:47:24 mail postfix/smtps/smtpd[21979]: B48F860379: client=162.37.235.186.geniosite.com.br[186.235.37.162], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:40 mail postfix/smtps/smtpd[24194]: 3A17A60379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:42 mail postfix/smtps/smtpd[24194]: 8E08360379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:44 mail postfix/smtps/smtpd[24194]: E466160379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:47 mail postfix/smtps/smtpd[24194]: 5229360379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:49 mail postfix/smtps/smtpd[24194]: 9607960379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:51 mail postfix/smtps/smtpd[24194]: D5D6160379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:54 mail postfix/smtps/smtpd[24194]: 38F9760379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:56 mail postfix/smtps/smtpd[24194]: 8ADBB60379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:50:58 mail postfix/smtps/smtpd[24194]: E030160379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:51:01 mail postfix/smtps/smtpd[24194]: 472E160379: client=unknown[191.53.206.223], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:06 mail postfix/smtps/smtpd[24194]: DD04D6037B: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:09 mail postfix/smtps/smtpd[24194]: CFFF460379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:12 mail postfix/smtps/smtpd[24194]: 29B9860379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:14 mail postfix/smtps/smtpd[24194]: 5E9AF60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:16 mail postfix/smtps/smtpd[24194]: BF76B60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:19 mail postfix/smtps/smtpd[24194]: 1D2C360379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:21 mail postfix/smtps/smtpd[24194]: 4EF9A60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:23 mail postfix/smtps/smtpd[24194]: 9B5A360379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:26 mail postfix/smtps/smtpd[24194]: 07AAB60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:52:28 mail postfix/smtps/smtpd[24194]: 3A7FB60379: client=unknown[191.53.18.225], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:41 mail postfix/smtps/smtpd[26569]: 78D7960379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:43 mail postfix/smtps/smtpd[26569]: 8D8DA60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:45 mail postfix/smtps/smtpd[26569]: A6B7260379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:47 mail postfix/smtps/smtpd[26569]: C02EC60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:49 mail postfix/smtps/smtpd[26569]: DB7A460379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:52 mail postfix/smtps/smtpd[26569]: 02A6B60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:54 mail postfix/smtps/smtpd[26569]: 1A82560379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:56 mail postfix/smtps/smtpd[26569]: 3215E60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:55:58 mail postfix/smtps/smtpd[26569]: 0D45E60379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:56:00 mail postfix/smtps/smtpd[26569]: 2571460379: client=unknown[187.85.207.247], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:07 mail postfix/smtps/smtpd[26569]: 2D84960379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:09 mail postfix/smtps/smtpd[26569]: CB25460379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:11 mail postfix/smtps/smtpd[26569]: F2FB160379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:14 mail postfix/smtps/smtpd[26569]: 27D7660379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:16 mail postfix/smtps/smtpd[26569]: 4ED6160379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:18 mail postfix/smtps/smtpd[26569]: 75DAA60379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:20 mail postfix/smtps/smtpd[26569]: 9DD8260379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:22 mail postfix/smtps/smtpd[26569]: C843260379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:24 mail postfix/smtps/smtpd[26569]: EFF8C60379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Sep 19 09:57:27 mail postfix/smtps/smtpd[26569]: 26AC060379: client=unknown[177.10.241.78], sasl_method=LOGIN, sasl_username=francesco
Those are obviously a fraud.
How is it possibile? On the ubuntu box i have already launched rkhunter without any evidence. Admin port (7071) is firewalled.
Can you help me guys?