[nsp-sec] DDoS to EveryDNS nameserver IPs

[Stephen Gill]

Supposedly these are the likely C&C candidates after a very helpful
individual took a brief glance at an infected machine:

9800    | 211.95.76.6      | UNICOM CHINA UNICOM
23898   | 58.65.232.34     | HOSTFRESH-AS-AP HostFresh Internet

I've fired up the malware on our Sandbox to see if it matches up.  There are
quie a few varieties of this file and almost 0 AV pick it up.

You can also google for the most recent sample:

SHA1 a5396141cab8b22d9d88b28a814089537dce366a
MD5 01c3346c241652f43aed8e2149881bfe

Lawrence should have a seccheck now.

PID     1252   204.184.73.43:1168   58.65.232.34:80   ESTABLISHED
winlogon.exe   \??\C:\WINDOWS\SYSTEM32\winlogon.exe

PID     1252   204.184.73.43:1175   211.95.79.6:80   ESTABLISHED
winlogon.exe   \??\C:\WINDOWS\SYSTEM32\winlogon.exe

-- steve


On 2/4/09 11:39 AM, "David Ulevitch" <david at opendns.com> wrote:

> ----------- nsp-security Confidential --------
> 
> I'm currently receiving a large DDoS to all my EveryDNS nameserver IPs:
> 
> ns1.everydns.net has address 208.76.56.56
> ns2.everydns.net has address 78.129.207.168
> ns3.everydns.net has address 71.6.202.220
> ns4.everydns.net has address 208.96.6.134
> 
> The DDoS appears to all be UDP packets of length 1000 bytes.
> 
> Here's what I mean:
> 
> 01:39:20.107917 IP 115.186.96.138.58798 > 208.76.56.56.2194: UDP,
> length 1000
> 01:39:20.107959 IP 82.212.143.159.2270 > 208.76.56.56.4000: UDP,
> length 1000
> 01:39:20.107969 IP 187.10.195.160.60001 > 208.76.56.56.2105: UDP,
> length 1000
> 01:39:20.107986 IP 189.119.47.137.25664 > 208.76.56.56.908: UDP,
> length 1000
> 01:39:20.107991 IP 213.189.175.47.3732 > 208.76.56.56.3804: UDP,
> length 1000
> 01:39:20.108012 IP 202.41.85.244.22349 > 208.76.56.56.3119: UDP,
> length 1000
> 01:39:20.108089 IP 89.174.93.234.4675 > 208.76.56.56.3589: UDP, length
> 1000
> 
> Anyone know what this looks like or anything I can do to stop it...
> 
> 3 of the 4 nameservers are offline right now, and I'm working with
> some folks to bring up some more machines now.  Ironically, I'm at the
> ICANN DNS meeting at GATech right now with a bunch of you. :-)
> 
> Thanks,
> David Ulevitch
> 415 971 6916
> 
> 
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-- 
Stephen Gill, Chief Scientist, Team Cymru
http://www.cymru.com | +1 312 924 4023 | gillsr at cymru.com