Snort mailing list archives
[SPAM] Re: C2 - Zeus?
From: rmkml <rmkml () yahoo fr>
Date: Thu, 13 Jun 2013 21:17:50 +0200 (CEST)
Hi Paul and Joel, Thx you for sharing and comments,Joel: Im curious why Sourcefire VRT rule sets contains {1} on this few rules please ? (maybe already fixed ??)
sid 23137 rev 6: ...(\s*\x27\s*|\s*\&\#39\;\s*|\s*\&\#x27\;\s*|\s*\\u0027\;\s*){1}... sid 23136 rev 6: ...(\s*\x27\s*|\s*\&\#39\;\s*|\s*\&\#x27\;\s*|\s*\\u0027\;\s*){1}... sid 4638 rev 4: ...\x01.{1}... sid 15709 rev 11: ...\d{1}... sid 25588 rev 1: ...\d{1}... sid 23257 rev 3: ...[0-9a-f]{1}... ... Regards @Rmkml On Thu, 13 Jun 2013, Joel Esler wrote:
Paul, A couple comments, In your pcre you end with "id\=[0-9]{2,}", is there something after the two digits? or does it end there? (Can we do "id\=[0-9]{2}$") As it stands right there, "2," will keep searching on and on. Also, [a-zA-Z]{1}… The {1} is unnecessary in this case. Any pcaps here? On Jun 13, 2013, at 7:28 AM, Paul Bottomley <Paul.Bottomley () betfair com> wrote: Might need running in your test lab for a week or so to see what it picks up… From observation so no reference. alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.Zeus outbound connection"; flow:established,to_server; content:"/images/"; fast_pattern:only; http_uri; pcre:"/\/images\/[a-zA-Z]{1}\.php\?id\=[0-9]{2,}/Ui"; classtype:trojan-activity; sid:xxxxxx; rev:1;) Thanks
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Current thread:
- C2 - Zeus? Paul Bottomley (Jun 13)
- Re: C2 - Zeus? Joel Esler (Jun 13)
- [SPAM] Re: C2 - Zeus? rmkml (Jun 13)
- Re: C2 - Zeus? Paul Bottomley (Jun 14)
- Re: C2 - Zeus? Joel Esler (Jun 14)
- Re: C2 - Zeus? Joel Esler (Jun 13)