Intrusion Detection System, a system for detecting and alerting based on behavior.

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6
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1answer
352 views

How do I identify which PC made a suspicious DNS query?

Our IDS detected a suspicious DNS packet going to a Botnet (or similar). Since that DC is a recursive relay, how can we identify the client who made that request. (Windows DNS server)
0
votes
1answer
9 views

(spp_sdf) SDF Combination Alerts in Snort

I'm testing Snort in IDS mode and have been receiving a few (spp_sdf) SDF Combination Alerts as below. Seems like it happens when I visit certain but not all https sites. Tried to google this alert ...
3
votes
0answers
93 views

Decrypt TLS from an IDS

So I am trying to figure out what the packet payload is off of a possible TLS HeartBleed alert from my IDS. I have read that Wireshark is able to do it with some certain keys, but isn't that in real ...
3
votes
0answers
488 views

Security Onion:snorby alerts shows all local nerwork source IP(public and private)

I have just installed Security Onion distro based on ubuntu. This distro does a great job of combining multiple tools like snort/suricata,sguil,snorby,elsa,bro ids,squert. In my Security Onion ...
2
votes
0answers
41 views

Priming an IDS/IPS for an impending attack

Is there a system which can put an IDS/IPS in "high alert" mode if there information about a suspected impending attack in the near future (obtained from an external system)? I would like to know if ...
2
votes
0answers
39 views

problem blocking TCP scans by setting up honeyd in virtual environment

I am creating a virtual environment where I have created three virtual machines, CentOS as an Apache Webserver CentOs as an Attacker machine FreeBSD with Honeyd to setup Honeypot I have ...
2
votes
0answers
45 views

Extra p0f v3 fingerprints files?

p0f v3 is a passive operating system detector. The latest release is 3.08b, dating to November, 2014. Given the releases of Windows 10, multiple Linux, Firefox and Chrome versions since then, the ...
1
vote
0answers
11 views

Adding Windows 7 VM as a log source/forcing the IDS inline

I'm investigating ways to add my Windows 7 VM as a log source or even run that traffic through my IDS VM and then out to the internet but I'm not entirely sure how to approach it. Does anybody have ...
1
vote
0answers
97 views

How to test OSSEC HIDS using a linux dataset containing raw system call traces?

I have been tasked to test effectiveness of OSSEC HIDS (by effectiveness I mean detection rate it achieves as well as false positives rate) when a dataset of raw system call traces are used. The ...
1
vote
0answers
304 views

OSSEC not detecting deleted files?

I have configured 3 VMs: ossec server and two agents in CentOS 6 and Windows 2k8 R2. I have completed the setup and FIM and Log Management works smoothly. It also reports the new files. However, it ...
1
vote
0answers
399 views

Difference IDS/IPS layer 2 or 3

I understand that an IDS/IPS working on layer 2 has more insight into what is going on. But considering IDS/IPS evasions, why is a layer 2 device preferable as compared to a layer 3 device that is ...
1
vote
0answers
527 views

Snort not showing dropped/blocked packets

This question is about SNORT- I m basically trying to detect PING FLOOD attack. I have included the rule**(drop icmp any any -> any any (itype:8; threshold, track by_src, count 20, ...
1
vote
0answers
140 views

State transition Analysis Technique

As far as I have read and understood STAT is a concept used to design a platform independent IDS. My doubt is whether there exists any compiler/interpreter for STAT Language as I am planning to do a ...
0
votes
0answers
17 views

Snort matching against single packets

For a specific task, I'd like to match snort rules against the first 1-2 packets of each flow in the network without waiting for the other subsequent flow packets. Can I do this with snort? If so, ...
0
votes
0answers
44 views

Suricata IPS manual blocking/unblocking vs. snort and guardian

Does anyone have experience with using Suricata as an IPS? Im on Debian and I'd like to be able to manually block and unblock specific ip addresses (iptables). I've not used Suricata as I am currently ...
0
votes
0answers
24 views

Snort arpspoof preprocessor not giving alerts

I'm attempting to use Snort to detect a simple arpspoof attack on a test network I've set up. I have the following 4 ip addresses on this network. 192.168.1.1 Router 00:18:39:EC:F5:78 192.168.1.2 ...
0
votes
0answers
31 views

Snort rule to detect More Fragments fragbit not working

I have a Virtualbox setup with Snort running on a Windows 7 host and Kali Linux as the attacking machine, connected on an internal network. I'm investigating ways to get Snort to detect fragmentation ...
0
votes
0answers
44 views

Is EasyIDS obsolete?

I have found EasyIDS from Skynet Development recently but noticed that the latest change-log is from 2009. Does this mean it is obsolete and should not be used as it is not being kept up-to date?
0
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0answers
31 views

Switching from Snort rules to Emerging Threats. Is there a way to know which ET rule sid covers the same vulnerabilty as Snort rule sid?

Our company has been using the snort community rules and we have tuned our rule files over years to our specific needs. Now our company has decided to use Emerging Threats (ET) open rules. The ET ...
0
votes
0answers
26 views

Security Data Analytics - Classical Measurements/Metrics

for my new Job I have to prepare information about how Security Data Analysis is actually use in practice. So my question is if someone can provide me with measurements/metrics/queries (don't really ...
0
votes
0answers
295 views

problem with my snort rule

I have written this rule but when I try to reload Snort it is failing. I have commented out the rule and reloaded snort; it is working so I know it's the rule. alert tcp any any -> any 5466 ...
0
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0answers
50 views

Possible to run snort without modifiers?

Is there anyway (e.g some command line argument) with which we can tell snort to run and perform detection but without caring for the rule modifiers if there are any ? e.g alert tcp any any -> ...