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

Stefan Sabolowitsch Stefan.Sabolowitsch at felten-group.com
Fri Aug 23 07:12:44 UTC 2013


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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