RE: TCP 445 Scan?

["Thompson, Jason" <Jason.Thompson () xwave com>]

Actually while setting up a honeypot, I got it infected with a trojan, which
I am going to analyze shortly. After 4.5 hours of being on the net, I was
hit on port 445, and after the infection took place, the machine began
spamming out packets on port 445 to IP addresses incrementing the 4th octet
(24.222.5.6, 24.222.5.7, 24.222.5.8, etc). The scans were pretty quick. A
short time later I was getting traffic from my machine destined to a remote
machine on port 6667, so it is likely that it is some kind of IRC trojan
like Backdoor.IRC.Zcrew or something. I'm not cleaning it until I'm finished
the analysis.

The interesting thing is I had a similar thing happen to a client's PC at
the office last week, and I had to clean that as well. It was infected with
Backdoor.IRC.Zcrew. I believe incidents.org mentioned that this trojan (or
trojans like it) are back on the rise.

                -Jason

-----Original Message-----
From: Brian McWilliams [mailto:brian () pc-radio com] 
Sent: March 4, 2003 16:00
To: Charles Hamby; incidents () securityfocus com
Subject: Re: TCP 445 Scan?


Maybe it's this new worm?

http://www.viruslist.com/eng/viruslist.html?id=59741


Worm.Win32.Randon

Randon is a Virus-Worm distributed via IRC-channels and LANs with shared 
resources.

When executed this worm installs its components into the subdirectory zxz 
and/or zx in the Windows system directory and registers its main file and 
the mIRC client in the Windows registry auto-run key (below):

HKLM\\Software\Microsoft\Windows\CurrentVersion\Run\updateWins

Randon then executes the above key and hides the process via the 
HideWIndows utility. Randon connects to the IRC-server and executes its 
scripts. In addition to DDoS attacks and IRC channel flooding, Randon scans 
port 445 of other IRC clients.

[snip]

At 01:25 PM 2/27/2003, Charles Hamby wrote:


> Morning/Afternoon All,
>
> Has anyone else recently been pegged with a large number of distributed 
> TCP 445 scans over a short amount of time (within a few minutes)?  A 
> couple of days ago I was hit by roughly 60+ scans in a short amount of 
> time; when I waded through it it wound up being about 45 unique IP 
> address all looking for TCP 445.  Below is an excerpt from my fireall 
> log (Netscreen).  Has anyone else been seeing these sorts of scans 
> lately? I've only seen the one scan, so I haven't had a chance to 
> capture any more traffic.
>
> -CDH
>
>
> 2003-2-23 23:05:52 Deny  213.51.247.114->W.X.Y.Z  0 sec TCP PORT 445 
> 2003-2-23 23:05:49 Deny  213.51.247.114->W.X.Y.Z  0 sec TCP PORT 445
> 2003-2-23 23:05:36 Deny  213.51.21.143->W.X.Y.Z   0 sec TCP PORT 445
> 2003-2-23 23:05:33 Deny  213.51.21.143->W.X.Y.Z   0 sec TCP PORT 445
> 2003-2-23 23:05:30 Deny  12.242.204.86->W.X.Y.Z   0 sec TCP PORT 445
> 2003-2-23 23:05:27 Deny  12.242.204.86->W.X.Y.Z   0 sec TCP PORT 445
> 2003-2-23 23:05:23 Deny  62.253.118.133->W.X.Y.Z  0 sec TCP PORT 445 
> 2003-2-23 23:05:21 Deny  65.163.177.202->W.X.Y.Z  0 sec TCP PORT 445 
> 2003-2-23 23:05:20 Deny  62.253.118.133->W.X.Y.Z  0 sec TCP PORT 445
> 2003-2-23 23:05:19 Deny  217.1.167.84->W.X.Y.Z    0 sec TCP PORT 445
> 2003-2-23 23:05:18 Deny  65.163.177.202->W.X.Y.Z  0 sec TCP PORT 445 
> 2003-2-23 23:05:18 Deny  12.231.241.129->W.X.Y.Z  0 sec TCP PORT 445
> 2003-2-23 23:05:18 Deny  24.66.39.214->W.X.Y.Z    0 sec TCP PORT 445
> 2003-2-23 23:05:17 Deny  12.229.115.40->W.X.Y.Z   0 sec TCP PORT 445
> 2003-2-23 23:05:16 Deny  62.190.172.203->W.X.Y.Z  0 sec TCP PORT 445
> 2003-2-23 23:05:16 Deny  217.1.167.84->W.X.Y.Z    0 sec TCP PORT 445
> 2003-2-23 23:05:16 Deny  217.162.202.177->W.X.Y.Z 0 sec TCP PORT 445 
> 2003-2-23 23:05:16 Deny  217.162.183.155->W.X.Y.Z 0 sec TCP PORT 445 
> 2003-2-23 23:05:15 Deny  12.231.241.129->W.X.Y.Z  0 sec TCP PORT 445
> 2003-2-23 23:05:15 Deny  24.66.39.214->W.X.Y.Z    0 sec TCP PORT 445
> 2003-2-23 23:05:14 Deny  141.153.232.196->W.X.Y.Z 0 sec TCP PORT 445
> 2003-2-23 23:05:14 Deny  12.229.115.40->W.X.Y.Z   0 sec TCP PORT 445
> 2003-2-23 23:05:14 Deny  12.231.161.15->W.X.Y.Z   0 sec TCP PORT 445
> 2003-2-23 23:05:13 Deny  217.162.7.16->W.X.Y.Z    0 sec TCP PORT 445
> 2003-2-23 23:05:13 Deny  62.190.172.203->W.X.Y.Z  0 sec TCP PORT 445 
> 2003-2-23 23:05:13 Deny  12.242.250.247->W.X.Y.Z  0 sec TCP PORT 445 
> 2003-2-23 23:05:13 Deny  217.162.202.177->W.X.Y.Z 0 sec TCP PORT 445
>
> -----------------------------------------------------------------------
> -----
>
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