[Snort-users] MISC IP Reserved bit set

Frontgate Lab mdiwan at ...200...
Fri Oct 12 08:46:06 EDT 2001


Yes i did download rules from snort.org  BUT.. why would that trigger
the readme.eml content alert?

[root at ...3795... snort]# cat web-misc.rules | grep readme.eml
alert tcp $EXTERNAL_NET 80 -> $HOME_NET any (msg:"WEB-MISC readme.eml
autoload attempt"; flags:A+; content:"window.open(\"readme.eml\"";
nocase; classtype:attempted-user; sid:1290; rev:3;
reference:url,www.cert.org/advisories/CA-2001-26.html;)
alert tcp $EXTERNAL_NET 80 -> $HOME_NET any (msg:"WEB-MISC readme.eml
attempt"; flags:A+; uricontent:"readme.eml"; nocase;
classtype:attempted-user; sid:1284; rev:3;
reference:url,www.cert.org/advisories/CA-2001-26.html;)

Madhav



Matthew Collins wrote:
> 
> Look at the source port. 80 -> YourIP:35434.
> 
> Been downloading some rules from the snort web site?
> 
> >>> "Frontgate Lab" <mdiwan at ...200...> 12/10/01 16:02:13 >>>
> Hiya .. errm.. i think this is bad... i belive it is nimda:
> 
> Oct 11 11:48:35 fglab snort[4483]: [1:1284:3] WEB-MISC readme.eml
> attempt [Classification: Attempted User Privilege Gain] [Priority: 8]:
> {TCP} 151.196.107.166:80 -> 192.168.150.203:35434
> 
> nslookup results:
> 
>  nslookup 151.196.107.166
> Note:  nslookup is deprecated and may be removed from future releases.
> Consider using the `dig' or `host' programs instead.  Run nslookup with
> the `-sil[ent]' option to prevent this message from appearing.
> Server:         207.150.196.199
> Address:        207.150.196.199#53
> 
> Non-authoritative answer:
> 166.107.196.151.in-addr.arpa    name = snort.sourcefire.com.
> 
> Authoritative answers can be found from:
> 166.107.196.151.in-addr.arpa    nameserver = ns1.sourcefire.com.
> 166.107.196.151.in-addr.arpa    nameserver = ns2.sourcefire.com.
> ns1.sourcefire.com      internet address = 151.196.107.164
> ns2.sourcefire.com      internet address = 151.196.107.165
> 
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