Snort mailing list archives
Re: Egobot
From: Nick Randolph <drandolph () sourcefire com>
Date: Tue, 15 Oct 2013 12:05:09 -0400
Looking at the screenshot they used to show the outbound request it looks like sid:19165 might catch this but, since they provided a screenshot I can't tell if the 0x20 is present at the end of the user-agent string and it doesn't look like they provided a hash either. The %s indicates a string variable so the '/micro/advice.php' and the '1irst' are probably not static. Something like content:"arg1="; http_uri; content:"arg2="; distance:0; http_uri; should catch what you're looking for. On Tue, Oct 15, 2013 at 10:02 AM, James Lay <jlay () slave-tothe-box net>wrote:
I may have missed something...it IS early in the AM after all ;) alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-OTHER Win32.EgoBot CnC traffic"; ; flow:to_server,established; content:"|2f|micro|2f|advice.php|3f|arg1=1irst|26|arg2="; http_uri; fast_pattern:only; metadata:policy balanced-ips drop, policy security-ips drop, service http, ruleset community; reference:url, www.symantec.com/connect/blogs/backdooregobot-how-effectively-execute-targeted-campaign ; classtype:trojan-activity; sid:10000105; rev:1;) James ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60135031&iu=/4140/ostg.clktrk _______________________________________________ Snort-sigs mailing list Snort-sigs () lists sourceforge net https://lists.sourceforge.net/lists/listinfo/snort-sigs http://www.snort.org Please visit http://blog.snort.org for the latest news about Snort!
-- Nick Randolph Research Engineer Sourcefire, Inc. nrandolph () sourcefire com Sourcefire.com <http://www.sourcefire.com/>
------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60135031&iu=/4140/ostg.clktrk
_______________________________________________ Snort-sigs mailing list Snort-sigs () lists sourceforge net https://lists.sourceforge.net/lists/listinfo/snort-sigs http://www.snort.org Please visit http://blog.snort.org for the latest news about Snort!
Current thread:
- Egobot James Lay (Oct 15)
- Re: Egobot Nick Randolph (Oct 15)
- Re: Egobot James Lay (Oct 15)
- Re: Egobot Nick Randolph (Oct 15)