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PortSentry and Logcheck

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Richard Emory

PortSentry and Logcheck
« on: June 22, 2001, 07:00:39 AM »
I have Portsentry set to anal.
I get the following on most logcheck e-mail reports

Security Violations
=-=-=-=-=-=-=-=-=-=
Jun 21 08:12:33 e-smith kernel: Packet log: denylog DENY eth1 PROTO=6 212.41.192.23:1 (MYserverIP):56137 L=40 S=0x00 I=1253 F=0x0000 T=240 (#1)
Jun 21 08:12:36 e-smith kernel: Packet log: denylog DENY eth1 PROTO=6 212.41.192.23:3 (MYserverIP):56137 L=40 S=0x00 I=1505 F=0x0000 T=240 (#1)

ETC..........

when I nslookup and whois the IP, I get unfimillar results.
ie. I do not remember visiting this server.

Should I be concerned, or is this normal for this setting.
A URL for more information would be helpful.
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Richard Emory

Re: PortSentry and Logcheck
« Reply #1 on: June 22, 2001, 10:29:20 PM »
By the way, I am getting these about every two hours.
Coming from different IP addresses and different port scans.
If these are scans, then this should let the unaware now know how often your computer(s) could be scanned.
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Jules

Re: PortSentry and Logcheck
« Reply #2 on: June 22, 2001, 11:20:36 PM »
It looks as though someone is trying to drop a trojan/backdoor on your machine (port 56137). I am checking for more deatils on this port. The ipBlock belongs to Galactica (milan, Italy). This ip belongs tp lisa.galactica.it. (or does now ..contact galactica for mroe info. look for abuse@ email address

Will get back with more info ... Email other scans if you dont want to post them ..
julian@newcentcom.com




Results of lookup
---------------------------


Ip Is In Milan, Italy

Report for 212.41.192.23

Analysis: IP packets are being lost past network "UUNET PIPEX" at hop 14. at hop  Connections to HTTP port 80 are being
rejected.

------------------------------------------------------------------------------------------------------------------------------------------------------------
| Hop | %Loss | IP Address     | Node Name                              | Location             | Tzone  | ms  | Graph      | Network                       |
------------------------------------------------------------------------------------------------------------------------------------------------------------
| 0   |       | 161.58.180.113 | win10115.iad.dn.net                    | Dulles, VA, USA      |   -5.0 |     |            | Verio, Inc.                   |
| 1   |       | 161.58.176.129 | -                                      | ?Englewood, CO 80112 |        | 0   | x          | Verio, Inc.                   |
| 2   |       | 161.58.156.140 | -                                      | ?Englewood, CO 80112 |        | 0   | x          | Verio, Inc.                   |
| 3   |       | 129.250.27.190 | ge-1-3-0.r00.stngva01.us.bb.verio.net  | Sterling, VA, USA    |   -5.0 | 0   | x          | Verio, Inc.                   |
| 4   |       | 129.250.3.157  | p16-7-0-0.r01.mclnva02.us.bb.verio.net | Mclean, VA, USA      |   -5.0 | 0   | x          | Verio, Inc.                   |
| 5   |       | 204.255.169.89 | ATM5-0.BR3.DCA6.ALTER.NET              | Washington, DC, USA  |   -5.0 | 0   | x          | UUNET Technologies, Inc.      |
| 6   |       | 152.63.38.118  | 0.so-3-1-0.XL1.DCA6.ALTER.NET          | Washington, DC, USA  |   -5.0 | 0   | x          | UUNET Technologies, Inc.      |
| 7   |       | 152.63.35.113  | 0.so-0-0-0.XR1.DCA6.ALTER.NET          | Washington, DC, USA  |   -5.0 | 0   | x          | UUNET Technologies, Inc.      |
| 8   |       | 152.63.11.101  | 0.so-4-0-0.TR1.DCA6.ALTER.NET          | Washington, DC, USA  |   -5.0 | 0   | x          | UUNET Technologies, Inc.      |
| 9   |       | 152.63.10.121  | 121.at-4-0-0.IR1.DCA6.ALTER.NET        | Washington, DC, USA  |   -5.0 | 0   | x          | UUNET Technologies, Inc.      |
| 10  |       | 146.188.13.34  | SO-0-0-0.IR1.DCA4.Alter.Net            | Washington, DC, USA  |   -5.0 | 0   | x          | UUNET PIPEX                   |
| 11  |       | 146.188.3.202  | so-5-0-0.TR1.FFT1.Alter.Net            | Frankfurt, Germany   |   +1.0 | 78  |   x        | UUNET PIPEX                   |
| 12  |       | 146.188.8.94   | 297.at-4-0-0.XR2.MLN4.Alter.Net        | Milan, Italy         |   +1.0 | 93  |    x       | UUNET PIPEX                   |
| 13  |       | 146.188.4.201  | 314.ATM5-0-0.GW2.MLN4.Alter.Net        | Milan, Italy         |   +1.0 | 93  |    x       | UUNET PIPEX                   |
| 14  |       | 146.188.37.42  | Galactica-gw.customer.ALTER.NET        | -                    |        | 106 |    x------ | UUNET PIPEX                   |
| 15  | 100   | ?146.188.37.42 | Galactica-gw.customer.ALTER.NET        |                      |        |     |            | UUNET PIPEX                   |
| 16  | 100   | ?212.41.192.23 | ?lisa.galactica.it                     |                      |        |     |            | Galactica.it Network - Milano |
------------------------------------------------------------------------------------------------------------------------------------------------------------


domain:      galactica.it
x400-domain: c=it; admd=0; prmd=galactica;
org:         Galactica Spa
admin-c:     PL1155
tech-c:      MM4349
postmaster:  MM4349
zone-c:      MM4349
nserver:     212.41.208.6  dns.galactica.it
nserver:     193.205.245.8  dns2.nic.it
remarks:     Fully-Managed
mnt-by:      GALACTICA-MNT
created:     before 960129
changed:     hostmaster@nic.it 19990826
source:      IT-NIC


%%% End of referred query result
Logged

Jules

Re: PortSentry and Logcheck
« Reply #3 on: June 22, 2001, 11:44:45 PM »
Hey again

Nothing really known for port 56137 (unless the person trying to connect made a typo !!!)

Only ones close follow
5631 tcp udp  pcanywheredata pcANYWHEREdata symantec.com
5632 tcp udp  pcanywherestat pcANYWHEREstat symantec.com


55917 HACK sub7newserver22.zip
54320 tcp   Back Orifice 2000 (TCP)
54321 udp   Back Orifice 2000 (UDP)
65000 tcp stacheldraht Stacheldraht distributed attack tool Handler to/from agent
65301 tcp pcanywhere Used sometimes by PCAnywhere

Only other thing I found was something called HACK 56137 here :-
http://security.namodro.cz/dl/indexnew0004.asp

56137 HACK sechole3.zip
Získání Administrator pøístupu na lokální NT poèítaè (pre SP4 pouze)

)>

For port info goto :-
http://www.ec11.dial.pipex.com/port-num.htm
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Richard Emory

Re: PortSentry and Logcheck
« Reply #4 on: June 25, 2001, 06:45:56 PM »
How / where did you get that information?
I would like to know how and where to get more information on the server, the hack they are going after and how to stop or thawart the attack.  Also, if it is a real attack.  Also, I saw somewhere a program that I could use that would mis-represent the fingerprint my server gives out to scans.  Have you seen this and do you know where to get it?


This is all I got:


nslookup 212.41.192.23
Server:  localhost
Address:  127.0.0.1

Name:    lisa.galactica.it
Address:  212.41.192.23

[root@e-smith /root]# nmap -sS -O 212.41.192.23

Starting nmap V. 2.53 by fyodor@insecure.org ( www.insecure.org/nmap/ )
Interesting ports on lisa.galactica.it (212.41.192.23):
(The 1512 ports scanned but not shown below are in state: closed)
Port       State       Service
23/tcp     open        telnet                  
25/tcp     open        smtp                    
80/tcp     open        http                    
111/tcp    open        sunrpc                  
113/tcp    open        auth                    
139/tcp    open        netbios-ssn            
513/tcp    open        login                  
514/tcp    open        shell                  
515/tcp    open        printer                
1024/tcp   open        kdm                    
7010/tcp   open        ups-onlinet            

TCP Sequence Prediction: Class=random positive increments
                         Difficulty=2332566 (Good luck!)
Remote operating system guess: Linux 2.1.122 - 2.2.14

Nmap run completed -- 1 IP address (1 host up) scanned in 80 seconds
Logged

Sidney

Re: PortSentry and Logcheck
« Reply #5 on: June 26, 2001, 09:11:17 PM »
Sorry for getting a little off the subject but

could you tell me how to install portsentry and logcheck.

Is there any user manual that would be help for a beginner.

Thanks for any help
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Richard Emory

Re: PortSentry and Logcheck
« Reply #6 on: June 27, 2001, 02:06:14 AM »
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  1. Koozali.org: home of the SME Server
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  4. Topic: PortSentry and Logcheck