[Snort-users] Suspicious hacker activity detected?

Sandeep Singh ctrlaltdelngone at ...11827...
Tue Apr 15 13:16:48 EDT 2014


The kind of traffic you are observing will continue to be there for a
while. If you have your servers patched then the best thing would be to
identify the IP ranges that are making noise and block them on your
Firewall as I have seen these IP ranges generating inbound traffic towards
several other networks as well.

Thanks





On Tue, Apr 15, 2014 at 9:26 PM, Joel Esler (jesler) <jesler at ...589...>wrote:

>  yes, and it will continue for a long time.
>
>  On Apr 15, 2014, at 11:06 AM, Teo En Ming <teo.en.ming at ...11827...> wrote:
>
>   Hackers continue to probe my HTTPS, POP3S, and IMAPS ports for the
> heartbleed vulnerability after I have patched openssl in CentOS 6.5 and
> RHEL 7 Beta.
>
>  Here are the Snort alerts:04/15-05:04:23.266586  [**] [1:30524:1]
> SERVER-OTHER OpenSSL TLSv1.1 heartbeat read overrun attempt [**]
> [Classification: Attempted Information Leak] [Priority: 2] {TCP}
> 183.60.243.188:52169 -> 192.168.1.147:993
> 04/15-05:04:23.510253  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 183.60.243.188:52169 -> 192.168.1.147:993
> 04/15-06:02:28.430789  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 183.60.243.189:58534 -> 192.168.1.147:995
> 04/15-06:02:28.652725  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 183.60.243.189:58534 -> 192.168.1.147:995
> 04/15-07:05:21.194097  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 101.226.17.243:36498 -> 192.168.1.146:443
> 04/15-07:05:21.452853  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 101.226.17.243:36498 -> 192.168.1.146:443
> 04/15-08:38:08.402528  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 180.153.198.208:24518 -> 192.168.1.147:993
> 04/15-08:38:08.647470  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 180.153.198.208:24518 -> 192.168.1.147:993
> 04/15-08:48:29.737142  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 180.153.195.140:29860 -> 192.168.1.147:995
> 04/15-08:48:29.961892  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
> heartbeat read overrun attempt [**] [Classification: Attempted Information
> Leak] [Priority: 2] {TCP} 180.153.195.140:29860 -> 192.168.1.147:995
>
>  Regards,
>
>  Teo En Ming
>
>  <http://seclists.org/nmap-dev/2014/q2/83>
>
>
> On Tue, Apr 15, 2014 at 3:10 AM, Teo En Ming <teo.en.ming at ...11827...>wrote:
>
>>  I have patched openssl on RHEL 7 Beta and rebooted.
>>
>>  Teo En Ming
>>
>>
>> On Tue, Apr 15, 2014 at 12:03 AM, Teo En Ming <teo.en.ming at ...11827...>wrote:
>>
>>>  I think downloading OpenSSL 1.0.1g, compiling and installing it will
>>> break OpenSSH. I prefer to install by RPM.
>>>
>>>  Regards,
>>>
>>>  Teo En Ming
>>>
>>>
>>> On Mon, Apr 14, 2014 at 11:45 PM, Nicholas Mavis (nmavis) <
>>> nmavis at ...589...> wrote:
>>>
>>>>  You can download OpenSSL 1.0.1g and compile it.
>>>>
>>>>  Nick
>>>>
>>>>   From: Teo En Ming <teo.en.ming at ...11827...>
>>>>  Date: Monday, April 14, 2014 at 11:40 AM
>>>> To: nmavis <nmavis at ...589...>
>>>> Cc: Snort Users <snort-users at lists.sourceforge.net>, Teo En Ming <
>>>> teo.en.ming at ...11827...>
>>>> Subject: Re: [Snort-users] Suspicious hacker activity detected?
>>>>
>>>>
>>>>  Dear Nicholas Mavis,
>>>>
>>>> I have patched openssl on Centos 6.5 x86_64. However, I cannot patch
>>>> openssl on my RHEL 7 Beta because I don't have a Red Hat Network
>>>> subscription. What do you think can be done?
>>>>
>>>>  Thank you.
>>>>
>>>>  Regards,
>>>>
>>>> Teo En Ming
>>>>
>>>>
>>>> On Mon, Apr 14, 2014 at 11:13 PM, Nicholas Mavis (nmavis) <
>>>> nmavis at ...589...> wrote:
>>>>
>>>>>  Yes, this is a sign and it also looks like you are vulnerable.
>>>>>
>>>>>  Nick
>>>>>
>>>>>   From: Teo En Ming <teo.en.ming at ...11827...>
>>>>> Date: Monday, April 14, 2014 at 11:06 AM
>>>>> To: Snort Users <snort-users at lists.sourceforge.net>
>>>>> Subject: [Snort-users] Suspicious hacker activity detected?
>>>>>
>>>>>    Hi,
>>>>>
>>>>>  My HTTPS web server, POP3S and IMAPS ports were probed for the
>>>>> OpenSSL heartbleed vulnerability without my knowledge and authorization. Is
>>>>> it a sign of hacker activity? Please look at the Snort alerts below.
>>>>>
>>>>> [root at ...274... snort]# grep heartbeat snort.fast | grep -v
>>>>> 161.69.31.4
>>>>> 04/14-04:34:45.168194  [**] [1:30516:6] SERVER-OTHER TLSv1.1 large
>>>>> heartbeat response - possible ssl heartbleed attempt [**] [Classification:
>>>>> Attempted Information Leak] [Priority: 2] {TCP} 192.168.1.146:443 ->
>>>>> 185.35.61.19:41201
>>>>> 04/14-09:31:58.763823  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 183.60.243.189:46524 -> 192.168.1.147:993
>>>>> 04/14-09:31:58.764609  [**] [1:30516:6] SERVER-OTHER TLSv1.1 large
>>>>> heartbeat response - possible ssl heartbleed attempt [**] [Classification:
>>>>> Attempted Information Leak] [Priority: 2] {TCP} 192.168.1.147:993 ->
>>>>> 183.60.243.189:46524
>>>>> 04/14-09:31:59.025988  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 183.60.243.189:46524 -> 192.168.1.147:993
>>>>> 04/14-09:36:47.578766  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 183.60.244.46:55346 -> 192.168.1.147:995
>>>>> 04/14-09:36:47.579841  [**] [1:30516:6] SERVER-OTHER TLSv1.1 large
>>>>> heartbeat response - possible ssl heartbleed attempt [**] [Classification:
>>>>> Attempted Information Leak] [Priority: 2] {TCP} 192.168.1.147:995 ->
>>>>> 183.60.244.46:55346
>>>>> 04/14-09:36:47.775693  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 183.60.244.46:55346 -> 192.168.1.147:995
>>>>> 04/14-09:36:47.775693  [**] [1:30512:5] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 183.60.244.46:55346 -> 192.168.1.147:995
>>>>> 04/14-10:13:25.031989  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 101.226.19.76:31223 -> 192.168.1.146:443
>>>>> 04/14-10:13:25.032841  [**] [1:30516:6] SERVER-OTHER TLSv1.1 large
>>>>> heartbeat response - possible ssl heartbleed attempt [**] [Classification:
>>>>> Attempted Information Leak] [Priority: 2] {TCP} 192.168.1.146:443 ->
>>>>> 101.226.19.76:31223
>>>>> 04/14-10:13:25.262897  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 101.226.19.76:31223 -> 192.168.1.146:443
>>>>> 04/14-10:13:25.262897  [**] [1:30512:5] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 101.226.19.76:31223 -> 192.168.1.146:443
>>>>> 04/14-11:51:26.034725  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 180.153.198.190:25521 -> 192.168.1.147:993
>>>>> 04/14-11:51:26.035167  [**] [1:30516:6] SERVER-OTHER TLSv1.1 large
>>>>> heartbeat response - possible ssl heartbleed attempt [**] [Classification:
>>>>> Attempted Information Leak] [Priority: 2] {TCP} 192.168.1.147:993 ->
>>>>> 180.153.198.190:25521
>>>>> 04/14-11:51:26.232356  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 180.153.198.190:25521 -> 192.168.1.147:993
>>>>> 04/14-11:51:26.232356  [**] [1:30512:5] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 180.153.198.190:25521 -> 192.168.1.147:993
>>>>> 04/14-12:01:46.374268  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 180.153.198.219:50214 -> 192.168.1.147:995
>>>>> 04/14-12:01:46.375062  [**] [1:30516:6] SERVER-OTHER TLSv1.1 large
>>>>> heartbeat response - possible ssl heartbleed attempt [**] [Classification:
>>>>> Attempted Information Leak] [Priority: 2] {TCP} 192.168.1.147:995 ->
>>>>> 180.153.198.219:50214
>>>>> 04/14-12:01:46.597640  [**] [1:30524:1] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 180.153.198.219:50214 -> 192.168.1.147:995
>>>>> 04/14-12:01:46.597640  [**] [1:30512:5] SERVER-OTHER OpenSSL TLSv1.1
>>>>> heartbeat read overrun attempt [**] [Classification: Attempted Information
>>>>> Leak] [Priority: 2] {TCP} 180.153.198.219:50214 -> 192.168.1.147:995
>>>>>
>>>>>  Yours sincerely,
>>>>>
>>>>>  Teo En Ming
>>>>>
>>>>
>>>>
>>>
>>
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