Intrusion Detection Systems

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Log Attacks in Different Files using Snort

How can I log attacks separately using snort. I basically want to log attacks invoked from different files separately. Like if I have 2 files, ddos.rules and log.rules, then I want logs generated from ...
2
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1answer
55 views

How to configure Suricata to not interfere with virtual machine

I'm currently planning on setting up Suricata as a firewall on my laptop. I'm wondering however if it's possible to set Suricata to not interfere with traffic to and from specific virtual machines ...
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2answers
31 views

Attack Signatures books [closed]

I have an assignment to do for school which involves attack signatures (I have to do a service-specific IDS). Basically what I have to do is to generate signatures for some attacks with Metasploit on ...
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3answers
44 views

IDS in combination with vulnerability scanner

I'm planning to set up a server environment with high security requirements on which i want to install an intrusion detection system (snort). Additionally, I think of running a vulnerability scanner ...
0
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2answers
225 views

NGINX Hacking Attempt

Every time I start my test-server and let it run for some days I get this in my log-files (in different variations): 111.241.26.165 - - [18/Feb/2014:22:16:45 +0100] "\x04\x01\x00\x19\xCBER!\x00" 400 ...
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2answers
32 views

server with eth0 promisc-mode vulnerable to attacks outside firewall?

If you use a passive network tap and a server with an eth port in promiscuous mode to monitor all traffic between WAN port of your router and RJ45 port of your ISP cable modem. Is the IDS instance ...
2
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3answers
79 views

EICAR alternative for IDS/IPS

Is there a way to trigger alarms in an Intrusion Detection System with something similar to the EICAR test virus? Maybe some special packet that is harmless to the environement, but will trigger IDS? ...
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0answers
26 views

How to filter errors 404 to show only those which are related to php files? [migrated]

One of my web servers is getting flooded with requests to resources that do not exist anymore, generating the corresponding 404 error. As I'm using OSSEC and OSSIM, then these errors are sent to the ...
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16 views

Snort 2.9.6.0 to detect malicious nfs traffic [migrated]

I have a snort inline mode IPS.I wanted this IPS to detect malicious nfs traffic.Can anyone please help me out to describe rules that catches the suspicious "nfs" traffic,not allowing it and allow the ...
6
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1answer
235 views

Isn't a HIDS, NIDS and WAF complementary?

Assume this scenario: Someone trying to hack a website. Simply put: www.site.com/example.php?=<script>alert(1)</script> A HIDS would see this attempt in Apache's access log, a NIDS would ...
6
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2answers
345 views

Detecting Pass-the-Hash

I was wondering what you guys are doing to detect attacks like Pass-The-Hash within your network. I've read about Breachbox ...
2
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1answer
96 views

IPS/IDS and Firewall Solution(s) to a Small Office

I was tasked with implementing a network security solution for a small real estate agency. They are a typical old-school mom and pops shop, about 15 employees with basic file sharing, printing, and ...
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1answer
75 views

Locate rogue wireless access point using Kismet data

Is there any way how to use Kismet data to locate rogue wireless access points?
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0answers
70 views

Snort Rule Writing (Alert Fires But Traffic Does Not Match *Intended* Rule)

I have the following rule: alert tcp $HOME_NET any > $EXTERNAL_NET any (msg:"This should not happen"; flow:established,to_server; content:"GET "; depth:4; content:"Set-Cookie:"; http_header; ...
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7answers
296 views

How does an IDS identify a computer ?

How does an IDS identify a computer on the network. I mean do IDS' actually check whether a device is actually what it claims to be ? If so what factors does it check (MAC etc) ? For e.g. if a ...
0
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1answer
121 views

Cryptic threat names

I have logs from a security appliance from Damballa which has cryptic names for threats observed in a network which I am trying to make sense of. Some examples of these threats are "RedTreeBruisers" , ...
2
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1answer
104 views

New to ossec - what does active response do out of the box

I am new to ossec. I installed the server and wui on a dedicated machine. I have agents running on my zookeeper and kafka servers to start. Below are events I am seeing. I assume the are ...
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0answers
82 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, ...
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2answers
70 views

Ips used by the same person?

Is it possible to find out if ips are from the same location and used by one person. We have a situation were three ips have been logged etc. We know for sure that two are from the same person this ...
0
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1answer
46 views

Industry standards for threat names

One of the security appliances we own reports a so-called "Industry Name" for the threats it detects on the network. I wanted to know if there is really such a standard and where I can find ...
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3answers
580 views

Published data sets for IDS/IPS evaluation

I am looking for data sets published by researchers or freelancers which can be used for the purpose of IDS/IPS testing and evaluations. The data sets may be for portscans, DoS attacks, Remote to ...
0
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1answer
78 views

IDS false positive rates

Are there any industry accepted standards for the false positive rates for a Network IDS based on Snort? Is there a way to check the false positive rates in a deployed IDS? (ideally without looking at ...
21
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3answers
14k views

Simple example auditd configuration?

Auditd was recommended in an answer to Linux command logging? The default install on Ubuntu seems to barely log anything. There are several examples that come with it (capp.rules, nispom.rules, ...
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1answer
54 views

Intrusion Detection and Prevention technologies [closed]

I'm supposed to do a research paper on a recent technology and I thought of doing it on a technology in information security. I found interest on Intrusion detection and prevention systems (IDPS) but ...
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2answers
222 views

What criteria should be used for manually reviewing / prioritizing failed logins?

I have a web application that is exposed to the Internet, and am interested in creating alerts, or prioritizing the manual review of failed logins to the web application. What thresholds, or ...
3
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1answer
81 views

Tracking down the source of email attacks

For the past week our company's IDS has been blocking 100-200 meeting invite emails per day from a specific client that are loaded with buffer overflows targeted at Exchange 2003. The payloads are ...
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1answer
88 views

How to properly configure OSSEC for Web Application Security ?

I would like to implement OSSEC as HIDS on my server, but by default OSSIC monitors a number of folders. I am going to deploy a web application on my server. So what should be my default OSSEC ...
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1answer
43 views

Do generic custom scripts avoid detection more than common security applications?

Are scripts coded only using the default API of a high level, interpreted language for generic and meticulous gathering of network device & host software information that are already available ...
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2answers
144 views

Questions on IDS, IPS, VLANs and VPN [closed]

I have a network that has a single point of entry the WAN. The WAN exposes about 10 static IP's that resolve internally to servers that are in the same subnet. Meaning that if you RDP over 3389 to ...
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1answer
151 views

OSSEC on an existing running machine

I am setting up a OSSEC on existing running machine. From my research I find that I should be running the following command to check for previous intrusion. zcat /var/log/*.gz | ...
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1answer
86 views

Botnet callback patterns

I am trying to understand the network behavior of bots. Are there any identifiable characteristics of callback requests from the bot to the C&C server which differentiates it from normal traffic? ...
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8answers
8k views

Can I detect web app attacks by viewing my Apache log file?

I occasionally get clients requesting I look at their access_log file to determine if any web attacks were successful. What tools are helpful to discern attacks?
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3answers
4k views

Difference between IDS and IPS and Firewall

The differences between an IDS and a firewall are that the latter prevents malicious traffic, whereas the IDS: Passive IDS: the IDS only reports that there was an intrusion. Active IDS: the IDS also ...
2
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1answer
442 views

How to add wildcards to snort rule ip address?

Is it possible to add wildcards or something that would function like them to a snort rule IP address? For example: If I'd like to detect source-ip of: 192.168.*.9 Where the third octet can be ...
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2answers
362 views

What type of data does Snort log?

This is new to me, but what types of data does Snort log for Network Intrusion Detection? I am guessing time stamp, source IP address, destination IP address, source port, destination port, protocol. ...
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2answers
196 views

Can you tell if an attack is successful by looking at IPS logs?

In my organization, we have an IPS behind a firewall. Each time a security event is triggered, I am left to wonder if the attack is really successful. For events that are set to drop in inline, we can ...
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1answer
46 views

Moving all servers to routeable IP Addresses

Company I am consulting to wants to move all their servers from private IP space to public IP space. I'm am trying to convince them that this is a bad idea that it makes sense to move only certain ...
6
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3answers
539 views

How could malware like Stuxnet be detected?

Stuxnet and others in this list of state-of-the-art Internet worms had certain features that they were very stealthy in leaking out the information they harvested. Thus it managed to go under the ...
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2answers
349 views

Using “canaries” to detect intrusion?

I haven't read much about such a technique, but I'm wondering if there's any sort of best practice around the use of "canaries" to detect certain types of intrusion: Create a bogus account that ...
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2answers
296 views

Suricata IPS rules for honeypot

I have a really simple high interaction honeypot and I have just installed a VM as an IPS (suricata) with a transparent bridge between my router and the honeypot. The setup looks something like this: ...
2
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3answers
215 views

Make OSSEC ban ip on remote firewall

I am deploying OSSEC architecture agent-server mode. I want the server to ban ip not only on agent but also on a remote firewall (dedicated iptables server). I've seached on the OSSEC's ...
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2answers
125 views

Can IPS system be used as IDS and vice versa

I would like to know can an Network Intrusion Prevention System[IPS] be used as an Network Intrusion Detection System[IDS] and vice versa. Can the Host based IPS be used as a host based IDS and vice ...
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2answers
543 views

Sending Syslog/SNMP information over the internet using standard UDP port 514

I'm looking into monitoring a Windows VPS by sending Syslog messages to a Synology NAS, which can generate email alerts and such. I also would like to use SNMP to generate health stats, and see trends ...
2
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1answer
537 views

IPS fail close vs IPS fail open, what are the risks and benefits?

If a desicion is to be be made on selecting a mode of fail for an inline IPS that is protecting servers, what are the criteria that should be considored for selecting one of the failure modes: 1- ...
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0answers
61 views

Alert correlation benchmark [closed]

I'm looking for some alert correlation tool to reduce number of alerts about 50%. It should support IDMEF. I googled for alert correlation tools but just found ACARM-ng, TIAA and MACE and all of them ...
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2answers
1k views

Can you have 2 promiscuous (sniffing) ports on a single machine?

I'm wondering if you can actually have 2 (or more) promiscuous (sniffing) ports on a single machine, to monitor multiple network segments? And can you monitor them all with snort?
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60 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 ...
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3answers
208 views

Out-of-the-box Network Intrusion Appliance for non-Power User

First, let me apologize if any of this question is naive or beneath the scope of this board. Bear in mind the context and that I'm asking as an attempt to exhaust all resources. Also, I understand if ...
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1answer
243 views

WAF testing frameworks

How to test the effectiveness of a Web Application Firewall (WAF), or any other security control that is put in place to protect the web application from being attacked? Currently, what are the ...
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3answers
5k views

Snort's great, but BASE isn't. What are some alternative front-ends?

BASE is an improvement over ACID, but it's easy to tell that it's maintained by someone who doesn't use it. There's no at-a-glance overview of network activity like you get with McAfee's NUBA IDS and ...