[prev in list] [next in list] [prev in thread] [next in thread]
List: snort-users
Subject: Re: [Snort-users] Signature 17210
From: Joel Esler <jesler () sourcefire ! com>
Date: 2012-10-26 17:13:41
Message-ID: ED91CEB9-F583-410E-A01C-2CEE37445776 () sourcefire ! com
[Download RAW message or body]
[Attachment #2 (multipart/alternative)]
Ensure its a false positive too.
Sent from my iPhone
On Oct 26, 2012, at 12:48 PM, "Jefferson, Shawn" <Shawn.Jefferson@bcferries.com> \
wrote:
> Typo… copying = coping
>
>
> From: Jefferson, Shawn [mailto:Shawn.Jefferson@bcferries.com]
> Sent: Friday, October 26, 2012 9:37 AM
> To: Joel Esler; K Vijaya Sai Prasanth
> Cc: snort-users@lists.sourceforge.net
> Subject: Re: [Snort-users] Signature 17210
>
> As far as false positives go, I think you have the following options (if the \
> traffic/event is legitimate and cannot be shutdown):
> 1. Disable the rule entirely (you will lose all detection/prevention for this \
> rule though!) 2. Write a suppression rule in threshold.conf (a more targeted \
> approach). 3. Take the original rule, add some unique content match to it, and \
> make it a pass rule in your local.rules (where you can identity something unique \
> about the false positive and don't have the ability to do #2 above without losing \
> some detection/prevention capability.)
> That's what I do in these cases. Anyone else have additional ways of copying with \
> false positives?
>
>
> From: Joel Esler [mailto:jesler@sourcefire.com]
> Sent: Friday, October 26, 2012 6:16 AM
> To: K Vijaya Sai Prasanth
> Cc: snort-users@lists.sourceforge.net
> Subject: Re: [Snort-users] Signature 17210
>
> On Oct 26, 2012, at 6:31 AM, K Vijaya Sai Prasanth <sai.prashanth@isgn.com> wrote:
>
>
> Can anyone explain when this rule is triggered and how any false positives can be \
> mitigated? I see that this is the rule definition. Can someone please interpret \
> this?
> That rule indicates a Portable Executable file transfer has taken place over SMB \
> shares.
> I'd get started with the docs at www.snort.org/docs for information.
>
> --
> Joel Esler
> Senior Research Engineer, VRT
> OpenSource Community Manager
> Sourcefire
[Attachment #5 (text/html)]
<html><head><meta http-equiv="content-type" content="text/html; \
charset=utf-8"></head><body dir="auto"><div>Ensure its a false positive \
too. <br><br>Sent from my iPhone</div><div><br>On Oct 26, 2012, at 12:48 PM, \
"Jefferson, Shawn" <<a \
href="mailto:Shawn.Jefferson@bcferries.com">Shawn.Jefferson@bcferries.com</a>> \
wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" \
content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word \
12 (filtered medium)"><style><!-- /* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"Lucida Grande";}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Arial","sans-serif";
color:blue;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Arial","sans-serif";
color:blue;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1842355290;
mso-list-type:hybrid;
mso-list-template-ids:-1556295774 269025295 269025305 269025307 269025295 269025305 \
269025307 269025295 269025305 269025307;} @list l0:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level2
{mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level3
{mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level4
{mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level5
{mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level6
{mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level7
{mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level8
{mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level9
{mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--><div class="WordSection1"><p \
class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Typo… \
copying = coping<o:p></o:p></span></p><p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><o:p> </o:p></span></p><p \
class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><o:p> </o:p></span></p><div><div \
style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in"><p \
class="MsoNormal"><b><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span \
lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> \
Jefferson, Shawn [<a \
href="mailto:Shawn.Jefferson@bcferries.com">mailto:Shawn.Jefferson@bcferries.com</a>] \
<br><b>Sent:</b> Friday, October 26, 2012 9:37 AM<br><b>To:</b> Joel Esler; K Vijaya \
Sai Prasanth<br><b>Cc:</b> <a \
href="mailto:snort-users@lists.sourceforge.net">snort-users@lists.sourceforge.net</a><br><b>Subject:</b> \
Re: [Snort-users] Signature 17210<o:p></o:p></span></p></div></div><p \
class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">As \
far as false positives go, I think you have the following options (if the \
traffic/event is legitimate and cannot be shutdown):<o:p></o:p></span></p><p \
class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><o:p> </o:p></span></p><p \
class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if \
!supportLists]--><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><span \
style="mso-list:Ignore">1.<span style="font:7.0pt "Times New \
Roman""> </span></span></span><!--[endif]--><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Disable \
the rule entirely (you will lose all detection/prevention for this rule \
though!)<o:p></o:p></span></p><p class="MsoListParagraph" \
style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><span \
style="mso-list:Ignore">2.<span style="font:7.0pt "Times New \
Roman""> </span></span></span><!--[endif]--><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Write \
a suppression rule in threshold.conf (a more targeted \
approach).<o:p></o:p></span></p><p class="MsoListParagraph" \
style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><span \
style="mso-list:Ignore">3.<span style="font:7.0pt "Times New \
Roman""> </span></span></span><!--[endif]--><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Take \
the original rule, add some unique content match to it, and make it a pass rule in \
your local.rules (where you can identity something unique about the false positive \
and don't have the ability to do #2 above without losing some detection/prevention \
capability.)<o:p></o:p></span></p><p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><o:p> </o:p></span></p><p \
class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">That's \
what I do in these cases. Anyone else have additional ways of copying with \
false positives?<o:p></o:p></span></p><p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><o:p> </o:p></span></p><p \
class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><o:p> </o:p></span></p><p \
class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><o:p> </o:p></span></p><div><div \
style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in"><p \
class="MsoNormal"><b><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span \
lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> \
Joel Esler [<a href="mailto:jesler@sourcefire.com">mailto:jesler@sourcefire.com</a>] \
<br><b>Sent:</b> Friday, October 26, 2012 6:16 AM<br><b>To:</b> K Vijaya Sai \
Prasanth<br><b>Cc:</b> <a \
href="mailto:snort-users@lists.sourceforge.net">snort-users@lists.sourceforge.net</a><br><b>Subject:</b> \
Re: [Snort-users] Signature 17210<o:p></o:p></span></p></div></div><p \
class="MsoNormal"><o:p> </o:p></p><div><div><p class="MsoNormal">On Oct 26, \
2012, at 6:31 AM, K Vijaya Sai Prasanth <<a \
href="mailto:sai.prashanth@isgn.com">sai.prashanth@isgn.com</a>> \
wrote:<o:p></o:p></p></div><p class="MsoNormal" \
style="margin-bottom:12.0pt"><o:p> </o:p></p><div><p class="MsoNormal"><span \
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Can \
anyone explain when this rule is triggered and how any false positives can be \
mitigated? I see that this is the rule definition. Can someone please interpret \
this?<o:p></o:p></span></p></div><div><p class="MsoNormal"><span \
style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p></div></div><p \
class="MsoNormal">That rule indicates a Portable Executable file transfer has taken \
place over SMB shares.<o:p></o:p></p><div><p \
class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">I'd get \
started with the docs at <a href="http://www.snort.org/docs">www.snort.org/docs</a> \
for information.<o:p></o:p></p></div><div><p \
class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal"><span \
style="font-size:9.0pt;font-family:"Lucida Grande"">--</span><br><b><span \
style="font-size:9.0pt;font-family:"Lucida Grande"">Joel \
Esler</span></b><br><span style="font-size:9.0pt;font-family:"Lucida \
Grande"">Senior Research Engineer, VRT</span><br><span \
style="font-size:9.0pt;font-family:"Lucida Grande"">OpenSource Community \
Manager</span><br><span style="font-size:9.0pt;font-family:"Lucida \
Grande"">Sourcefire</span><o:p></o:p></p></div></div></div></blockquote></body></html>
------------------------------------------------------------------------------
The Windows 8 Center
In partnership with Sourceforge
Your idea - your app - 30 days. Get started!
http://windows8center.sourceforge.net/
what-html-developers-need-to-know-about-coding-windows-8-metro-style-apps/
_______________________________________________
Snort-users mailing list
Snort-users@lists.sourceforge.net
Go to this URL to change user options or unsubscribe:
https://lists.sourceforge.net/lists/listinfo/snort-users
Snort-users list archive:
http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users
Please visit http://blog.snort.org to stay current on all the latest Snort news!
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic