Snort mailing list archives
Re: Trojan.APT.Seinup sig with pcre help request
From: James Lay <jlay () slave-tothe-box net>
Date: Thu, 20 Jun 2013 09:03:28 -0600
On 2013-06-19 12:07, James Lay wrote:
This one hurt my head: alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Trojan.Win32.APT.Seinup outbound connection"; flow:to_server,established; content:"php|3f|"; http_uri; pcre:"/\x2ephp\x3fa-z0-9]{11,13}=[a-z0-9]{3,7}\x26/"; metadata:policy balanced-ips drop, policy security-ips drop, service http; reference:url,http://www.fireeye.com/blog/technical/malware-research/2013/06/trojan-apt-seinup-hitting-asean.html; classtype:trojan-activity; sid:10000081; rev:1;) Is that PCRE too beefy? I didn't go the full length of the url..it's pretty nuts. Thanks for any help on this all. James
Updated rule to nuke some FP's: alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Trojan.Win32.APT.Seinup outbound connection"; flow:to_server,established; content:".php|3f|"; http_uri; pcre:"/\x2ephp\x3f[a-z0-9]{11,13}=[a-z0-9]{3,7}\x26[a-z0-9]{3,5}=/iU"; metadata:policy balanced-ips drop, policy security-ips drop, service http; reference:url,http://www.fireeye.com/blog/technical/malware-research/2013/06/trojan-apt-seinup-hitting-asean.html; classtype:trojan-activity; sid:10000081; rev:2;) James ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ 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:
- Trojan.APT.Seinup sig with pcre help request James Lay (Jun 19)
- Re: Trojan.APT.Seinup sig with pcre help request James Lay (Jun 19)
- Re: Trojan.APT.Seinup sig with pcre help request James Lay (Jun 20)
- Re: Trojan.APT.Seinup sig with pcre help request James Lay (Jun 21)
- Re: Trojan.APT.Seinup sig with pcre help request Joel Esler (Jun 21)
- Re: Trojan.APT.Seinup sig with pcre help request James Lay (Jun 21)
- Re: Trojan.APT.Seinup sig with pcre help request Joel Esler (Jun 21)