[TelstraClear] Telstaclear IP intrusion and exploit?

Forums › One NZ (including Farmside) › [TelstraClear] Telstaclear IP intrusion and exploit?

wastrel

4 posts

Wannabe Geek

#25994 8-Sep-2008 21:21

Hi guys ( esp Telstraclear if he's around)

I am getting suspicious activity on Port 445 from the following IP's which a from TC ( customers?)

What should I do? The following 9 are from port 445

9/8/2008 7:53:53 PM   121.14.136.143
9/8/2008 8:00:54 PM   121.73.125.79 lookup from whois below
9/8/2008 8:11:09 PM   121.73.125.43
9/8/2008 8:20:27 PM   121.73.22.193
9/8/2008 8:32:11 PM   121.219.25.195
9/8/2008 8:49:04 PM   121.63.146.18
                                  121.73.135.30
                                  121.73.11.203
                          121.73.6.147

P Information for 121.73.125.79

IP Location:	New Zealand Telstraclear Wellington Cable Customers
IP Address:	121.73.125.79
Blacklist Status:	Clear

9/8/2008 7:53:53 PM    Intrusion.Win.DCOM.exploit    121.14.136.143    TCP    135
9/8/2008 8:00:54 PM    Intrusion.Win.DCOM.exploit    121.73.125.79    TCP    135
9/8/2008 8:11:09 PM    Intrusion.Win.DCOM.exploit    121.73.125.43    TCP    135
9/8/2008 8:20:27 PM    Intrusion.Win.DCOM.exploit    121.73.22.193    TCP    135
9/8/2008 8:32:11 PM    Intrusion.Win.DCOM.exploit    121.219.25.195    TCP    135
9/8/2008 8:49:04 PM    Intrusion.Win.DCOM.exploit    121.63.146.18    TCP    135
9/8/2008 8:49:38 PM    Intrusion.Win.MSSQL.worm.Helkern    61.134.56.18    UDP    1434
9/8/2008 9:10:17 PM    Intrusion.Win.DCOM.exploit    121.72.241.12    TCP    135

I googled the following about this ansd is all I could find:

10-Mar-2003
10:45    From approx 21:30 last night, there has been an excessive amount
14710823 undesirable traffic on port 445. Yet another windows XP exploit
         (worm). Have installed port block in ingress to help protect clients.

http://www.albury.net.au/netstatus/status.cgi?netstatus.2003

TIA

freitasm

BDFL - Memuneh
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#163168 8-Sep-2008 21:39

If this is in your router than it is being blocked - unless you don't have a router, in which case I suggest you run a firewall (or enable the Windows Vista firewall which should be on by default).

You could contact TelstraClear and ask them to contact the customer to advise of this problem...

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JoeBloggs

355 posts

Ultimate Geek

#163181 8-Sep-2008 22:37

There were a number of worms circulating via exploits in XP a couple of years ago. It seems they're still not dead. How did you get these records? Do you have an existing firewall? If so, you should be fine. If not, just download Zonealarm or something to that extent. As Mauricio says, send TC an email outlining the IP's in question (with time stamp). They'll send the customers a warning. Most likely they don't even know about it.

wastrel

4 posts

Wannabe Geek

#163202 9-Sep-2008 00:16

Thanx for the replies

Yes I do have a firewall. I used Outpost but it slows my browser down ( Firefox) too much so I use the firewall that comes with Kasperksy which blocks fine.
I know I am blocking these exploits atm but heres the thing. I changed from XTRA adsl to Telstra cable a couple of weeks ago and immediately was inundated with viruses and Malware which took ages to remove without a HD format etc. It seems having a new IP everytime I boot up with Adsl may thwart attacks and now I'm a sitting duck.
Perhaps asking for a diff IP would help? I know I am blocking them but I wasn't being attacked before I changed to cable. What do you guys think?

I just sent an email to the admins at Telstra:

list.admin@team.telstraclear.co.nz

Dear sir/s,

I am coming under attack from the following Telstra IP's

Please advise what I should ( or you) should so. I noticed when I changed from Xtra adsl to Telstra cable a couple of weeks ago I received a lot of malware and viruses I didnt have previously.

9/8/2008 11:28:48 PM    Intrusion.Win.DCOM.exploit    121.73.33.240    TCP    135

and the following

9/8/2008 7:53:53 PM    121.14.136.143
9/8/2008 8:00:54 PM    121.73.125.79
9/8/2008 8:11:09 PM    121.73.125.43
9/8/2008 8:20:27 PM    121.73.22.193
9/8/2008 8:32:11 PM    121.219.25.195
9/8/2008 8:49:04 PM    121.63.146.18
                        121.73.135.30
                        121.73.11.203
                        121.73.6.147

121.73.133.1    121.73.133.1    60 bytes    0 bytes
121.73.6.147    121.73.6.147    246 bytes    162 bytes
203.96.152.4    203.96.152.4    11 KB    4.3 KB

Could you please look into this for me

Regards

tknz

182 posts

Master Geek
+1 received by user: 7

#166369 22-Sep-2008 20:00

I am a security engineer - that is just netbios traffic, windows networking, its not malicious, For example if you plug your PC straight into the cable modem that will appear as just a nomral networking interface, windows sends out netbios traffic. You will be seing port 135, 445, maybe a bit of 139.

It's just noise.
infact nothing there would raise any alarms except the worm traffic. which is outside of the Telstra Range anyway.

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Any views and ideas that I have expressed in my comments are my own, and do not represent my place of work.
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Fraktul

836 posts

Ultimate Geek

Trusted

#166400 22-Sep-2008 22:40

Uh, I thought RPC was TCP 135 and TCP 137-139 were typical netbios over tcp/ip. Mind you I'm only a rocket surgeon :(

tknz

182 posts

Master Geek
+1 received by user: 7

#166401 22-Sep-2008 22:44

tend to just shroud it under the one term. It will be windows sending out its networking crap. :D