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

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23
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8answers
17k views

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

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?
2
votes
1answer
892 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 ...
1
vote
2answers
2k 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. ...
8
votes
2answers
309 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 ...
1
vote
1answer
70 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
votes
3answers
1k 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 ...
10
votes
2answers
530 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 ...
2
votes
2answers
655 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: ...
1
vote
2answers
249 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 ...
2
votes
2answers
2k 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 ...
1
vote
0answers
109 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 ...
4
votes
2answers
3k 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?
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 ...
2
votes
1answer
734 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 ...
-1
votes
1answer
119 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 ...
-2
votes
2answers
95 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 ...
14
votes
2answers
9k views

How do Intrusion Detection Systems (IDS) work?

How do Intrusion Detection Systems (IDS) work? As I understand it, they monitor network traffic but what exactly do they look for? How can they tell apart regular activity from intrusions?
2
votes
1answer
4k 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
votes
1answer
877 views

snort ignores packets with matching src/dest IP address

This is my rule: alert udp 192.168.1.1 4000 -> 192.168.1.1 7000 (msg:"This rule doesn't work"; sid:1234567;) I am running snort against a precaptured packet file where there are UDP packets that ...
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
2answers
6k views

What approaches are to detect DoS attack in IDS/Firewall?

First approach to DoS attack detection: There are techniques for intrusion detection, and of course DoS attack, in which for each packet (or flow) some features are calculated, then based on some ...
2
votes
1answer
6k 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
votes
2answers
1k 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
131 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 ...
11
votes
3answers
2k views

What are the pros/cons of using a threat detection system?

What are the pros/cons of using a threat detection system for a web app (like OWASP's AppSensor)? What does a properly implemented threat detection system do and how does it behave when it detects ...
-2
votes
5answers
35k views

How to check if someone is in my computer [duplicate]

Igen suspect that someone is may be controlling my computer using some remote desktop app. How I check if I am right or not? My only clue is that my mouse sometimes start to move randomly (it is not ...
0
votes
1answer
87 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 ...
18
votes
5answers
10k views

Do you detect/react to DNS tunnelling?

I've just seen a talk about tunnelling TCP/IP over DNS requests, because port 53 UDP is usually open and unfiltered. What techniques exist to detect and block such tunnels, and have you ever seen that ...
5
votes
1answer
183 views

Integrity check against package repository?

I have a Debian installed. When there are security updates, I review and install them as soon as possible and think about using automatic updates. From time to time I want to boot from a clean boot ...
2
votes
1answer
244 views

Does Verizon Wireless LTE network have intrusion prevention capabilities?

Can someone tell me whether or not Verizon Wireless's LTE network has an IDS/IPS capability? I'm trying to compare the security of their CDMA/LTE network to others that are GSM. EDIT for clarity: I ...
1
vote
2answers
713 views

SYN scan, TCP packet question

during SYN scans, many small tcp packets are sent to multiple ports to determine which ports are open or not. But when you're streaming media, aren't you receiving many One type of ID system, the ...
3
votes
1answer
2k views

Are Kismet (on OpenWRT) and Snort IDS (on a linux server) compatitble?

I'm trying to develop an IDS/IPS system project to include these elements: A router running OpenWRT running Kismet drone (Attitude Adjustment 12.09rc1) A Linux server (Running Kismet server + client) ...
4
votes
1answer
2k views

Does Web Apps and Databases running on AWS EC2 need a IDS/IPS?

I have googled around for information about Web Apps or Databases running on AWS EC2 needing a IDS/IPS or not. I will present my findings so far here, but it will be good if you guys can confirm ...
1
vote
2answers
453 views

Intrusion Prevention Systems: NIPS vs NBA

I was going through the wikipedia article on Intrusion Prevention Systems. It states two of the four types of IPS as follows: Network-based intrusion prevention system (NIPS): monitors the entire ...
3
votes
2answers
796 views

Why does layer 2 IDS seem underdeveloped compared to layer 3 IDS, for wireless network?

I understand that there are many applications such as Snort that do the job for network layer 3 IDS. From what I have researched, layer 2 wireless IDS seems like a field that is very slow in ...
-1
votes
1answer
1k views

Solutions to TCP FIN Host Sweep (Signature 3032)

The Intrusion Prevention System is giving me an attack with signature 3032, TCP FIN Host Sweep on one of the ip addresses. I need a solution or recommendation on how to avoid the TCP FIN Host Sweep.
1
vote
1answer
1k views

Snort, add TCP retransmission rule

Can somebody help me with adding rule for packet retransmission. I found some documentation about the snort rules, but I am confused how to use it. The rules which catches the packet retransmission ...
5
votes
2answers
430 views

How did Evernote detect the security breach?

http://blog.evernote.com/blog/2013/03/02/security-notice-service-wide-password-reset/ Evernote's official message says little about technical details of the attack and how it was detected. ...
1
vote
1answer
502 views

how to handle error reply messages?

For security reasons, many organizations do not allow error reply messages to leave their internal Internets. How, specifically, could hackers use information in echo reply messages to learn about the ...
1
vote
1answer
294 views

How to capture packet using agent in JADE (Java Agent Development Framework)?

I need to design an IDS using Mobile agent. Can anyone suggest how packet capture software is efficient in JADE, how to match the captured packet for intrusion?
1
vote
2answers
4k views

Snort false positive?

I've set up snort and am configuring it for my network. I have one vpn server making a connection to my dns/AD server. This connection sets off: GPL SHELLCODE x86 inc ebx NOOP The payload is as ...
5
votes
1answer
142 views

Symbiote Counter-Attack Detection

I saw this video on YouTube about hacking Cisco phones (and other embedded systems) and I was overjoyed when the presenter not only hacked, but presented a security solution. Intrigued, I started ...
1
vote
1answer
2k views

How to find IPS events in sonicwall syslog

I have a sonicwall os firewall, and the security dashboard shows about 9 intrusion prevention events in the last month. Most are called "Suspicious CIFS traffic 4". I have syslog servers setup with ...
1
vote
1answer
278 views

Working of WAF/IDS/IPS payload normalization schemes?

I want to know how WAF/IDS/IPS deals with Payload Transformations. Such payload transformations may be base64Encode html EntityDecode url Encode Remove whitespaces I want to know how WAF/IDS/IPS ...
1
vote
1answer
166 views

how to protect from Network scanner on android?

How can I block and detect network scanners on android platforms to stop scanning vlan of my hot spot. My question is: which scanners they use? how can i detect such scanners? Can i protect ...
1
vote
2answers
1k views

Where can I find worm traffic sample?

I have a program that has to detect scanning activity of worms. I need some samples of worms' traffic (pcap files) to try the program, and notes about the procedures which must be taken when running ...
4
votes
1answer
538 views

Anomaly Intrusion Detection relevant features

I am researching on Anomaly Intrusion Detection to implement one. At this phase, I am searching for relevant features to network traffic. I found 41 features from KDD CUP'99 project (the paper: WENKE ...
-3
votes
2answers
192 views

anomaly detection: feature calculation problem [closed]

I have a question about how to calculate features selected in [ 1 ]. It assumes that the impact of DoS attack on features are nSrcs=nDsts=1, nPkts/sec>a, nSYN/Pkts>b, ... (Table 1 of [ 1 ]) ...
0
votes
1answer
552 views

Network anomaly detection or anomaly-based intrusion detection?

When implementing anomaly-based intrusion detection system, if I want to dismiss U2R and R2L attacks (to avoid deep packet inspection), and to consider only Probe and DoS attacks, what features should ...
0
votes
1answer
337 views

Why unsupervised anomaly-based intrustion detection training data should be normal or less noisy

I recently read a paper which stated that "Traditional anomaly detection algorithms require a set of purely normal data from which they train their model" [1]. But as in K-means, or other unsupervised ...