[Oisf-users] IPS mode drop Problem on suri 1.4.5R

Stefan Sabolowitsch Stefan.Sabolowitsch at felten-group.com
Fri Aug 23 08:06:09 UTC 2013


OK, this rule work correctly only "alone" (no drops), without all other
rules.




Am 23.08.13 09:25 schrieb "rmkml" unter <rmkml at yahoo.fr>:

>Hi Stefan,
>
>Yes you are certainly right it's a bug,
>
>another test if you permit: could you active only sid 2011582 please ?
>could you drop again ?
>
>Regards
>@Rmkml
>
>
>On Fri, 23 Aug 2013, Stefan Sabolowitsch wrote:
>
>> Bonjour Hi , rmkml
>> This will not help.
>> Only this one rule make this Problem.
>>
>> Any idea, perhaps a bug in suri ?
>>
>> Regards Stefan
>>
>>
>>
>> Am 22.08.13 17:23 schrieb "rmkml" unter <rmkml at yahoo.fr>:
>>
>>> Thx Stefan for reply,
>>>
>>> Could you try if you disable temporary all drop sig below please ?
>>> (and if you alert sig  drop again your network traffic ?)
>>>
>>> Regards
>>> @Rmkml
>>>
>>>
>>> On Thu, 22 Aug 2013, Stefan Sabolowitsch wrote:
>>>
>>>> Hi Rmkl,
>>>> i found this drop rules.
>>>>
>>>> Regards
>>>> Stefan
>>>>
>>>> [root at ipd2 rules]# grep "^drop.*set,ET.http.javaclient.vulnerable"
>>>> *.rules
>>>> emerging-current_events.rules:drop http $EXTERNAL_NET any -> $HOME_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS Phoenix Java MIDI Exploit Received By
>>>>Vulnerable
>>>> Client"; flow:established,to_client;
>>>> flowbits:isset,ET.http.javaclient.vulnerable;
>>>> content:"META-INF/services/javax.sound.midi.spi.MidiDeviceProvider";
>>>> classtype:bad-unknown; sid:2013484; rev:3;)
>>>>
>>>> emerging-current_events.rules:drop http $EXTERNAL_NET any -> $HOME_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS - Modified Metasploit Jar";
>>>> flow:from_server,established;
>>>> flowbits:isset,ET.http.javaclient.vulnerable;
>>>> content:"msf|2f|x|2f|Payload"; classtype:trojan-activity; sid:2014560;
>>>> rev:6;)
>>>>
>>>> emerging-current_events.rules:drop http $HOME_NET any -> $EXTERNAL_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS Incognito/RedKit Exploit Kit vulnerable Java
>>>> payload request to /1digit.html";
>>>> flowbits:isset,ET.http.javaclient.vulnerable;
>>>> flow:established,to_server;
>>>> urilen:7; content:".html"; http_uri; content:" Java/1"; http_header;
>>>> pcre:"/\/[0-9]\.html$/U"; flowbits:set,et.exploitkitlanding;
>>>> classtype:trojan-activity; sid:2014750; rev:2;)
>>>>
>>>> emerging-current_events.rules:drop http $HOME_NET any -> $EXTERNAL_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS Unknown java_ara Bin Download";
>>>> flow:established,to_server; content:"java_ara&name="; http_uri;
>>>> content:"/forum/"; http_uri; content:".php?"; http_uri;
>>>> flowbits:isset,ET.http.javaclient.vulnerable;
>>>>classtype:trojan-activity;
>>>> sid:2014805; rev:2;)
>>>>
>>>> emerging-current_events.rules:drop http $EXTERNAL_NET any -> $HOME_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS Blackhole obfuscated Java EXE Download by
>>>> Vulnerable Version - Likely Driveby";
>>>> flowbits:isset,ET.http.javaclient.vulnerable;
>>>> flow:established,to_client;
>>>> content:"|0d 0a 9c 62 d8 66 66 66 66 54|"; classtype:trojan-activity;
>>>> sid:2014909; rev:2;)
>>>>
>>>> emerging-current_events.rules:drop http $EXTERNAL_NET any -> $HOME_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS Scalaxy Jar file"; flow:to_client,established;
>>>> content:"|0d 0a 0d 0a|PK"; content:"C1.class"; fast_pattern;
>>>>distance:0;
>>>> content:"C2.class"; distance:0;
>>>> flowbits:isset,ET.http.javaclient.vulnerable;
>>>>classtype:trojan-activity;
>>>> sid:2014983; rev:2;)
>>>>
>>>> emerging-current_events.rules:drop http $EXTERNAL_NET any -> $HOME_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS SofosFO Jar file 10/17/12";
>>>> flow:to_client,established; file_data; content:"PK"; within:2;
>>>> content:"SecretKey.class"; fast_pattern; distance:0;
>>>> content:"Mac.class";
>>>> distance:0; flowbits:isset,ET.http.javaclient.vulnerable;
>>>> classtype:trojan-activity; sid:2015812; rev:3;)
>>>>
>>>> emerging-current_events.rules:drop tcp $EXTERNAL_NET $HTTP_PORTS ->
>>>> $HOME_NET any (msg:"ET CURRENT_EVENTS Metasploit CVE-2012-1723 Path
>>>> (Seen
>>>> in Unknown EK) 10/29/12"; flow:to_client,established; file_data;
>>>> content:"PK"; within:2; content:"cve1723/";
>>>> flowbits:isset,ET.http.javaclient.vulnerable;
>>>>classtype:trojan-activity;
>>>> sid:2015849; rev:3;)
>>>>
>>>> emerging-current_events.rules:drop http $EXTERNAL_NET any -> $HOME_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS SofosFO Jar file 09 Nov 12";
>>>> flow:to_client,established; file_data; content:"PK"; within:2;
>>>> content:"SecretKey.class"; fast_pattern:only; content:"Anony";
>>>> pcre:"/^(mous)?\.class/R";
>>>>flowbits:isset,ET.http.javaclient.vulnerable;
>>>> classtype:trojan-activity; sid:2015876; rev:3;)
>>>>
>>>> emerging-current_events.rules:drop http $HOME_NET any -> $EXTERNAL_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS RedKit Exploit Kit Vulnerable Java Payload
>>>> Request
>>>> URI (1)"; flowbits:isset,ET.http.javaclient.vulnerable;
>>>> flow:established,to_server; content:"/33.html"; depth:8; http_uri;
>>>> urilen:8; flowbits:set,et.exploitkitlanding;
>>>>classtype:trojan-activity;
>>>> sid:2015930; rev:2;)
>>>>
>>>> emerging-current_events.rules:drop http $HOME_NET any -> $EXTERNAL_NET
>>>> any
>>>> (msg:"ET CURRENT_EVENTS RedKit Exploit Kit vulnerable Java Payload
>>>> Request
>>>> to URI (2)"; flowbits:isset,ET.http.javaclient.vulnerable;
>>>> flow:established,to_server; content:"/41.html"; depth:8; http_uri;
>>>> urilen:8; flowbits:set,et.exploitkitlanding;
>>>>classtype:trojan-activity;
>>>> sid:2015931; rev:2;)
>>>>
>>>> emerging-trojan.rules:drop http $EXTERNAL_NET any -> $HOME_NET any
>>>> (msg:"ET TROJAN Java EXE Download by Vulnerable Version - Likely
>>>> Driveby";
>>>> flowbits:isset,ET.http.javaclient.vulnerable;
>>>> flow:established,to_client;
>>>> content:"|0d 0a 0d 0a|MZ"; byte_jump:4,58,relative,little;
>>>> content:"PE|00
>>>> 00|"; distance:-64; within:4; threshold:type limit,track by_src,count
>>>> 1,seconds 3; classtype:trojan-activity; sid:2013036; rev:7;)
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Am 22.08.13 11:01 schrieb "rmkml" unter <rmkml at yahoo.fr>:
>>>>
>>>>> Hi Stefan,
>>>>>
>>>>> Sorry I don't help,
>>>>>
>>>>> but I have a question: can you search on your rules if you have
>>>>>another
>>>>> rule with flowbits but on drop mode please ?
>>>>> (like this: grep "^drop.*set,ET.http.javaclient.vulnerable" *.rules)
>>>>>
>>>>> Regards
>>>>> @Rmkml
>>>>>
>>>>>
>>>>> On Thu, 22 Aug 2013, Stefan Sabolowitsch wrote:
>>>>>
>>>>>> Hi all,
>>>>>> I have here҆
>>>>>> Executing: suricata --user sguil --group sguil -c
>>>>>> /etc/nsm/Wecker-intern/suricata.yaml -q 1 -l
>>>>>> /nsm/sensor_data/Wecker-intern
>>>>>> 22/8/2013 -- 06:00:26 - <Info> - This is Suricata version 1.4.5
>>>>>> RELEASE
>>>>>> 22/8/2013 -- 06:00:26 - <Info> - CPUs/cores online: 4
>>>>>> 22/8/2013 -- 06:00:26 - <Info> - Enabling fail-open on queue
>>>>>> 22/8/2013 -- 06:00:26 - <Info> - NFQ running in standard ACCEPT/DROP
>>>>>> mode
>>>>>>
>>>>>> Have a problem with a rule, i don't understand here.
>>>>>> Although this rule on alert marks, drop suricata the data stream.
>>>>>> If i disable the rule, the data are forwarded (not drop) .
>>>>>>
>>>>>> Why ?
>>>>>> Any idea?
>>>>>>
>>>>>> Thx
>>>>>> Stefan
>>>>>>
>>>>>> rules:
>>>>>> alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY
>>>>>> Vulnerable Java Version 1.6.x Detected"; flow:established,to_server;
>>>>>> content:"Java/1.6.0_"; ht
>>>>>> tp_user_agent; content:!"51"; within:2; http_user_agent;
>>>>>> flowbits:set,ET.http.javaclient.vulnerable; threshold: type limit,
>>>>>> count
>>>>>> 2, seconds 300, track by_s
>>>>>> rc; reference:url,javatester.org/version.html;
>>>>>>classtype:bad-unknown;
>>>>>> sid:2011582; rev:31;)
>>>>>>
>>>>>> Fast.log
>>>>>> 08/22/2013-08:36:38.770429  [**] [1:2011582:31] ET POLICY Vulnerable
>>>>>> Java Version 1.6.x Detected [**] [Classification: Potentially Bad
>>>>>> Traffic] [Priority: 2
>>>>>> ] {TCP} 192.168.0.143:4803 -> 156.151.59.19:80
>>>>>>
>>>>>> drop.log
>>>>>> 08/22/2013-08:36:38.770429: IN= OUT= SRC=192.168.0.143
>>>>>> DST=156.151.59.19 LEN=221 TOS=0x00 TTL=128 ID=18727 PROTO=TCP
>>>>>>SPT=4803
>>>>>> DPT=80 SEQ=2569271462 ACK=1691
>>>>>> 480634 WINDOW=64240 ACK PSH RES=0x00 URGP=0
>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>
>>





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