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Print bomb?

Published: 2012-06-08
Last Updated: 2012-06-09 13:49:47 UTC
by Mark Hofman (Version: 1)
4 comment(s)

There have been several reports now of PCs on the network printing what looks like an executable to a large number of printers.  Several scanning tools will cause this kind of behaviour, but in the instances I know of these tools were not being used on the network at the time.  The various AV products aren't great at picking this up, yet. 

If you have this happen in your network use your logs to determine the sending machine (will be in the print logs) and take it offline for investigation and re-imaging. If you happen to have the actual malware upload it via the contact form and make our malware guys and gals happy.

Mark

Some updates:

Other than the excellent comments made to the dairy (thanks), we received a file that is the file reportedly being sent to the printers - e864689c6897dab7daa727f2ab70ef5a. this file is some adware that currently has 21/41 detect rate which is slowly improving. The dropper is BA9D4EFB6622D4DE95C162D95CB171A4  and has a detect rate of 17/41 ATM.

 

 

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4 comment(s)

Packets wanted, DNS DDOS attacks

Published: 2012-06-08
Last Updated: 2012-06-08 02:56:31 UTC
by Mark Hofman (Version: 1)
1 comment(s)

Jim posted earlier in the week (https://isc.sans.edu/diary.html?storyid=13387) regarding a bind 9 vulnerability.  Whilst possibly unrelated we've had a report regarding a few million DNS responses with static IDs being sent to an organisation.

If you have something similar happening and you are in a position to capture some packets we'd appreciate it if you could upload some for us to have a look at.  Especially of they all have the same ID number.  

Mark  

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1 comment(s)

Follow up on Got packets? Interested in TCP/8909, TCP/6666, TCP/9415, TCP/27977 and UDP/7

Published: 2012-06-08
Last Updated: 2012-06-08 02:47:18 UTC
by Mark Hofman (Version: 1)
0 comment(s)

A few weeks ago I posted a request for packets for the above ports, a big thanks to all that provided information. 

Whilst still not 100% confirmed it looks like 8909 and 9415 are associated with open proxies.  I've seen some IPs that look for open proxies hit 8909 and 9415 as well as the normal proxy ports. 

27977 is still a bit of a mystery, the packets received were all associated with normal traffic that happened to use this port as a source port. 

UDP /7 was an interesting one.  I only received 8 packets that were relevant and these were interesting.  512 bytes long, After the header the first two bytes count up, the second two bytes count down and the rest of the packet is all 000's.  Likely because there was nothing to interact with.  Would dearly love some additional packets for this port.  

If you can help out submit the packets through the contact form and thanks in advance. 

Mark

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0 comment(s)
ISC StormCast for Friday, June 8th 2012 http://isc.sans.edu/podcastdetail.html?id=2587
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