Intrusion Detection Systems

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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 ...
2
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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
80 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? ...
6
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1answer
236 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 ...
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1answer
61 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 ...
2
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1answer
98 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
77 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
72 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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2answers
231 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 ...
2
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1answer
106 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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3answers
101 views

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 ...
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0answers
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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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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 ...
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" , ...
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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
79 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 ...
0
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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
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 ...
3
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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 ...
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2answers
145 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
87 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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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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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 ...
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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
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
540 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
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
297 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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1answer
542 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 ...
2
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3answers
217 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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0answers
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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2answers
550 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 ...
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1answer
244 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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2answers
504 views

Event monitoring for a home network

I'd like to utilise some of the free SIEM type products out there to increase the chances that I will detect attacks and compromises of any of the devices on my home network. Most of my home devices ...
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1answer
72 views

What steps are performed when a serious event reaches an Intrusion Detection System? [closed]

For example, you are using Snort and you just got a serious event, which states that a certain service is attacked. What do you do with the threat source IP? What are the steps that network event ...
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2answers
77 views

Block all kind of querys from ip [closed]

I want to check my network intrusion detection system (physical intrusion like unauthorized gadgets or devices in wifi/ethernet). Until now everything is ok, but I was wondering if I block every query ...
6
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2answers
347 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 ...
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0answers
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Should signature based NIDS detect malicious documents or executable malwares? [duplicate]

Two kinds of client side attacks are explained here, offensive-security.com: (1) just binary payloads and (2) exploit+payloads. Is it the responsibility of NIDS to detect them? It is the payload or ...
6
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3answers
211 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
809 views

What is the best place to put my IDS network sensor? [duplicate]

I can only place a single network sensor somewhere within my network. Would it be best placed between the border router and firewall, or between the firewall internal LAN?
2
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0answers
230 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
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1answer
2k views

Snort/IDS detect and alert on possible DoS/DDoS attack?

As per the title, I'm attempting to configure Snort to detect and alert on a incoming Denial of Service attack. Looking at the rulesets, which are primarily signature based rules, I can't see a ...
3
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2answers
511 views

Example of malware that spreads via USB? [closed]

I'm messing with Mandiant Redline on Windows Server 2012 in a VM and I wanted to download a sample virus that spreads via USB and modify it to attack Mandiant Redline - I've never written malware ...
4
votes
1answer
106 views

Security / logging on a Xen-based VPS instance?

Our company has a Xen-based instance on a VPS provider and we have some sensitive data stored on it. Is there a way for me to tell if/when employees of the hosting company have accessed my VPS (by ...
0
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1answer
64 views

How to specify a Snort rule connection duration?

Is it even possible to specify into a snort rule the duration of a connection? For example: in this format Hour, Minute, Second H, M, S = 0, 2, 1 If a connection that has the duration of 2 minutes ...
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 ...