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

rmkml rmkml at yahoo.fr
Thu Aug 22 15:23:09 UTC 2013


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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