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

Stefan Sabolowitsch Stefan.Sabolowitsch at felten-group.com
Thu Aug 22 09:48:04 UTC 2013


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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