Threat Level: green Handler on Duty: Kevin Liston

SANS ISC Internet Storm Center


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Shellshock via SMTP

Published: 2014-10-24
Last Updated: 2014-10-24 19:05:00 UTC
by Kevin Liston (Version: 1)
0 comment(s)

I've received several reports of what appears to be shellshock exploit attempts via SMTP.  The sources so far have all be webhosting providers, so I'm assuming these are compromised systems.  The emails headers look something like this (thanks Justin for the anonymized headers, no thanks to Outlook for helpfully trying to make the links live):

The payload is an IRC perl bot with simple DDoS commands and the ability to fetch and execute further code.

 

Keywords: shellshock
0 comment(s)

Are you receiving Empty or "Hi" emails?

Published: 2014-10-24
Last Updated: 2014-10-24 14:10:02 UTC
by Kevin Liston (Version: 1)
7 comment(s)

    I wanted to perform a little unscientific information gathering, I'm working with a small group who think they're being specifically targeted by these, while I think it's more widespread and opportunitistic.  If you've recently received these no content probe emails, or a simple "Hi" message, please send a simple comment below in this format:

  • Industry
  • Order of magnitued in size (e.g. <10, <100, <1000)
  • Sending domain

    Feel free to use our comment page to add extra analysis comments here: https://isc.sans.edu/contact.html

Keywords:
7 comment(s)
ISC StormCast for Friday, October 24th 2014 http://isc.sans.edu/podcastdetail.html?id=4207

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