Odd records issue

mike tancsa via Argus-info argus-info at lists.andrew.cmu.edu
Wed Jan 11 10:29:58 EST 2017


On 1/10/2017 3:57 PM, David Edelman wrote:
> As a rule I always suggest that you start the troubleshooting session by adding -X as the first argument on the command line that starts Argus. This might solve the problem and then you know to look at *ALL* of the argus configuration files.

> 
> Just a guess, the configuration parameter  ARGUS_TUNNEL_DISCOVERY  may be set to yes and have some impact. Since the default value is set to no killing the consumption of the configuration files may help. 

Hi,
The challenge is that by displaying only the tunnel payload, I have no
way of finding out via argus what IP delivered that payload. Its also
inconsistent.  With the botnet traffic, it saves the inner payload as a
record. with "normal" GRE traffic, it saves the transport GRE packet.

Tunnel Discovery is off.


eg, a tcpdump shows

10:22:19.945153 IP aa.bb.153.25 > xx.yy.xx.58: GREv1, call 10112, seq
24045, ack 28268, length 60: IP 10.0.0.210 > 224.0.0.22: igmp v3 report,
1 group record(s)

and argus shows

 10:22:19  *           gre        xx.yy.xx.58          <->
aa.bb.153.25              14      13437   CON

But there is no mention in the argus file of the host 10.0.0.210.  It
only seems to happen with the botnet generated GRE traffic.

	---Mike



> 
> --Dave
> 
> -----Original Message-----
> From: Argus-info [mailto:argus-info-bounces+dedelman=iname.com at lists.andrew.cmu.edu] On Behalf Of mike tancsa via Argus-info
> Sent: Tuesday, January 10, 2017 1:55 PM
> To: Argus <argus-info at lists.andrew.cmu.edu>
> Subject: Re: [ARGUS] Odd records issue
> 
> OK, I figured this out. It seems the contents of GRE packets are being recorded by argus as if they are actual packets.  Is there a way to flag these or keep these separate ?
> 
> e.g. a tcpdump shows
> length 578: 220.133.125.107 > 206.51.25.216: GREv0, proto IPv4 (0x0800), length 544: 185.125.128.61.53714 > 112.93.217.129.37883: UDP, length 512
> 
> % ra -nr border.arg -sproto:3,saddr,sport,daddr,dport,size - host
> 185.125.128.61
> Pro            SrcAddr  Sport            DstAddr  Dport
> udp     185.125.128.61.53714      112.93.217.129.37883
> 
> Its nice that this is saved, but it would be good if it were treated as "special" or different from the actual packet on the wire.
> 
> 	---Mike
> 
> On 1/10/2017 11:02 AM, mike tancsa via Argus-info wrote:
>> While I was trying to track down an issue with some unaccounted 
>> packets, I noticed that argus was creating a lot of records that dont make sense.
>>
>> One one of my sensors, I changed the config so that I would record a 
>> pcap.  In theory, both files should show the same data, no ? Instead, 
>> I have a LOT of addresses that are not in my network, and almost 
>> always
>> 582 bytes.
>>
>> % ra -nr argus.out -s saddr,sport,daddr,dport, bytes:4 ,pkts:2,proto:3 
>> - bytes 582 and pkts 1 | head -30
>>            SrcAddr  Sport            DstAddr  Dport TotB To Pro
>>       66.14.58.118.4710        165.57.97.129.62304   582  1 udp
>>     228.44.123.180.32215       130.71.80.142.169     582  1 udp
>>       42.80.37.245.64417        217.93.18.80.13594   582  1 udp
>>       42.80.37.245.64417        217.93.18.80.13594   582  1 udp
>>    184.111.255.119.46797       220.83.180.38.46450   582  1 udp
>>     208.20.172.166.10533     155.189.252.142.23409   582  1 udp
>>       87.96.180.21.42185       156.23.175.50.42394   582  1 udp
>>     135.215.238.69.41005      244.71.183.157.49514   582  1 udp
>>     42.118.169.234.64017      24.169.111.198.5837    582  1 udp
>>      62.150.25.153.2414        39.220.44.122.58128   582  1 udp
>>      113.20.11.165.45467      200.106.11.169.57598   582  1 udp
>>      172.180.78.96.51016       139.173.29.46.15019   582  1 udp
>>      172.180.78.96.51016       139.173.29.46.15019   582  1 udp
>>     44.122.117.130.20546      180.167.75.128.60420   582  1 udp
>>     44.122.117.130.20546      180.167.75.128.60420   582  1 udp
>>     235.102.137.81.59403     110.104.217.242.31414   582  1 udp
>>     235.102.137.81.59403     110.104.217.242.31414   582  1 udp
>>      52.15.123.178.12147        210.93.8.106.19146   582  1 udp
>>      52.15.123.178.12147        210.93.8.106.19146   582  1 udp
>>     68.195.206.107.19522      184.118.84.142.48695   582  1 udp
>>       173.129.21.3.5450      252.255.127.111.49931   582  1 udp
>>       173.129.21.3.5450      252.255.127.111.49931   582  1 udp
>>      94.187.10.197.3147       162.181.187.17.16443   582  1 udp
>>     208.189.73.229.33307        155.175.43.8.62169   582  1 udp
>>      115.98.69.100.4716         84.194.54.90.31643   582  1 udp
>>     181.61.176.121.25337       230.174.10.75.38614   582  1 udp
>>     17.126.194.240.59882         67.78.7.236.64742   582  1 udp
>>       68.209.4.147.38113        82.176.3.109.8904    582  1 udp
>>       68.209.4.147.38113        82.176.3.109.8904    582  1 udp
>>
>>
>> But looking at the pcap file AND a tcpdump of the interface, I never 
>> see any such packets.
>>
>> % ls -l
>> total 3779656
>> drwxr-xr-x  2 root  wheel  -        512 Jan 10 10:03 .
>> drwxr-xr-x  3 root  wheel  -       3072 Jan 10 10:03 ..
>> -rw-r--r--  1 root  wheel  -  207937088 Jan 10 10:57 argus.out
>> -rw-r--r--  1 root  wheel  - 3661365248 Jan 10 10:57 packet.out
>>
>> % tcpdump -nr packet.out greater 580 and less 583 reading from file 
>> packet.out, link-type EN10MB (Ethernet)
>>
>> % tcpdump -ner packet.out host 68.209.4.147 or host 17.126.194.240 or 
>> host 235.102.137.81 reading from file packet.out, link-type EN10MB 
>> (Ethernet)
>>
>> Any idea whats going on ?
>>
>> If I tcpdump the interface, it never sees any such traffic where as 
>> argus implies there is a LOT
>>
>> % ra -nr argus.out -s stime,saddr,daddr - bytes 582 and pkts 1 | head
>>          StartTime            SrcAddr            DstAddr
>>    10:03:46.217241       66.14.58.118      165.57.97.129
>>    10:03:46.536733     228.44.123.180      130.71.80.142
>>    10:03:47.724602       42.80.37.245       217.93.18.80
>>    10:03:47.724589       42.80.37.245       217.93.18.80
>>    10:03:49.187933    184.111.255.119      220.83.180.38
>>    10:03:53.051873     208.20.172.166    155.189.252.142
>>    10:03:57.551938       87.96.180.21      156.23.175.50
>>    10:04:00.120709     135.215.238.69     244.71.183.157
>>    10:04:02.452829     42.118.169.234     24.169.111.198
>>
>> Ra Version 3.0.8.2
>> Argus Version 3.0.8.2
>>
>>
> 
> 
> 




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