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Questions tagged [intrusion]

Intrusion the act of wrongfully entering upon, seizing, or taking possession of property owned and/or operated by others.

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VDSL modem getting probed?

My ZyXEL VMG8924-B30A VDSL modem recently had these alerts in its log. The WAN IP address of the modem is 10.225.205.128. There was nothing like this before 1 May. What is this? 2019 -05 -01 T16:05:...
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1answer
41 views

Public Availability of a good Dataset in PCAP (TCPDUMP) format for IDS/IPS testing [closed]

I am trying to pass good reputable malicious traffic from an IPS. There are several sources on internet to explore datasets like the oldest I think DARPA set (not available in pcap format and not that ...
165
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4answers
37k views

GitLab account hacked and repo wiped

I was working on a project, a private repo, and suddenly all the commits disappeared and were replaced with a single text file saying To recover your lost code and avoid leaking it: Send us 0.1 ...
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0answers
3k views

Github account hacked and repo wiped - Github Response

UPDATE: Ok looks like the source has been found. https://en.internetwache.org/dont-publicly-expose-git-or-how-we-downloaded-your-websites-sourcecode-an-analysis-of-alexas-1m-28-07-2015/ Silly me! :...
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1answer
93 views

Advice to detect suspicious activities on network

A private network (about 150 PCs) is connected to the internet through an edge router. According to the net admin, his network is scanned from the outside, at the edge router. I don’t have any more ...
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0answers
74 views

Google Home Hub Network Traffic on Port 8009

I noticed my desktop, that has never been used for anything related to google home or signed into the google account used to manage the Home Hub, that is on the same subnet was sending traffic to the ...
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0answers
76 views

Can Zeek (formerly Bro) be installed as in-line IPS?

I'm starting a comparison paper about inline Network IPS. I was looking for an opensource anomaly-based detection engine with IPS capabilities. The easiest choice seemed Zeek(formerly Bro) but from ...
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0answers
538 views

Snort rule for syn flood attacks - Limiting number of alerts

So I have a snort rule that detects syn flood attacks that looks like this: alert tcp any any -> $HOME_NET 80 (msg:”SYN Flood - SSH"; flags:S; flow: stateless; detection_filter: track by_dst, ...
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1answer
114 views

What features would you use to detect a backdoor or a bot installation?

I was reading a document about logging and analysis. The document talks about statistical analysis and machine learning techniques to detect some attack scenarios. For instance, If you want to detect ...
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0answers
44 views

I think my ssh server is under attack and it's really trecherous [duplicate]

I'm new here so please bear with me. And thanks for the opportunity. This is an awesome resource. For the past few days, my ssh server (it's a small convenience I run just so that I can access my ...
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1answer
199 views

intrusion prevention system detected “et policy pe exe” should i worry

I have a UniFi Security Gateway (USG Pro 4P) and just enabled IPS (intrusion prevention system). I am seeing many "ET POLICY PE EXE or DLL Windows file download HTTP" alerts. I have not been able to ...
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70 views

Looking for incident response data

Good evening cybersecurity community; I am looking for a nice data set that comprises some cybersecurity incidents and describes how these incidents were solved. Doing such documentation is e.g. ...
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1answer
61 views

Can IP address considered as a useful feature for intrusion detection?

I am trying to build a machine learning model which classifies attacks. My data has a bunch of IP addresses, and I don't know if I should use the IP address as a feature to detect attacks. I found ...
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0answers
62 views

Compromise Google GSuite by buying expired domain

I saw a question a few days ago that talked about if a domain is bought by someone else then would the emails to that domain be compromised. And it got me thinking about google gsuite and specifically ...
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1answer
141 views

How to safely expose a computer to the Internet with a public IP

Our LAN is configured behind a load balancing router, in turn connected to a modem assigning public IPs to connected devices. I am required to randomly test the connection effective throughput, ...
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1answer
71 views

How likely is it to see a commercial IDS/IPS that uses machine learning in the near future that performs better than a normal IDS/IPS? [closed]

I have to choose a field to study on and I want to know does it worth studying in this field and will the future IDS/IPS systems be using machine-learning/deep-learning or at least how likely is it? ...
4
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1answer
181 views

Windows: Who is this randomname person that authored *my* LibreOffice document?

A friend of mine for which I manage the computer has presented me a problem. How is it possible that Windows shows a random name in field "Authors" for a given document ? Here is a bit of context: ...
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1answer
109 views

Does this evidence seem consistent with an intrusion via the VNC server?

I am new to this forum, so apologies in advance if this question does not seem to fall within its scope, or if it seems too long: On two occasions over the past ~3 weeks, a hacker gained remote ...
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0answers
115 views

Snort not working with IDSWakeup

I have setup Snort with the registered user rules installed. I tested first by making the following rule in local.rules: alert icmp any any -> $HOME_NET any (msg:"ICMP test"; sid:10000001; rev:...
3
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1answer
118 views

Is there some type of x-ray that can see through HSM or shielded integrated circuit?

I know that security-oriented products can easily protect their contents from even the most sensitive commercial x-rays, which can see objects at about 0.5µm. But let's put cost limits aside (or ...
2
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0answers
177 views

What is the best way to test my anomaly detection system?

I have an IDS (Intrusion Detection System) built in C and I need to test it with real traffic. It is an anomaly detection system, so I need to train it with normal traffic first. The IDS that I built ...
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1answer
206 views

Anomaly based IDS Vs Protocol state based IDS

Is there any difference between them? On google, I can find many description about anomaly based IDS. But I can not find any description about protocol state based IDS.
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1answer
251 views

Potential intrusion on home network?

I was browsing through my home network linksys router logs today and noticed an incoming connection from 41.212.36.114 to port 44543. I checked out this IP address at it's coming from Kenya. I'm in ...
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1answer
76 views

Difficulty of accessing a physically connected Windows computer with disabled network adapter

Please consider the following setup: A computer running a non-deprecated and up-to-date version of Windows (e.g. 7/8/10) is physically connected to a LAN or WAN network by means of a plugged-in ...
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0answers
3k views

Is this event a security concern: Windows 10: Event 360, User Device Registration?

My computer just froze, and I ended up having to reboot. It appears Windows Defender was coming up with a notification, but that froze as well. I was trying to see what went wrong in the event ...
3
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1answer
169 views

How would an external attacker utilise universal plug and play to bypass a firewall?

I'm wondering what strategies and techniques are used to bypass firewalls which have universal plug and play. I'm aware of security issues regarding UPNP in the past but I've also heard that there ...
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3answers
146 views

What kind of damage controls should an online banking web application implement?

Considering an online banking or paypal-type web application with username/password login and two factor authentication (2FA) for transactions What are best practice security measures for damage ...
1
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1answer
67 views

Can using simultaneous intrusion detection systems (IDS) create conflicts?

Can simultaneously using 2 or more intrusion detection systems (IDS) on the same computer or network create conflicts ? Talking about tools (as examples) such as but not limited to: tripwire, bro, ...
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2answers
1k views

Popup window stating computer is hacked [duplicate]

I recently got a message on my laptop screen that someone is stealing: my credit card info my pictures facebook info However, nothing seems wrong with my facebook and I have all my pictures and apps....
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3answers
996 views

Are these log entries normal?

I have noticed high CPU usage, and noticed that user dinko had high CPU usage with the sshd process when I typed top. User dinko was just some random user that I created and had a Ruby application ...
9
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2answers
8k views

HIDS - Choosing between regular OSSEC or Wazuh fork

I intend to set up OSSEC and noticed there seem to be two main flavours: plain OSSEC and Wazuh fork. From what I've been able to gather (from Wazuh's website and documentation), the main advantages ...
1
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1answer
131 views

non-rfc1918 address appeared on router dashboard

Quick context: Home network, performing some DPI on my perimeter router (Ubiquiti EdgeRouter Lite) that governs 2 internal subnets separating my traffic from a bunch of roommate devices. No IDS on the ...
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2answers
94 views

WireShark tried to load a suspicious system.dll

When starting Wireshark (v1.12.2, using runas /user:administrator) on an old Windows XP SP3 system, Privacyware Privatefirewall alerted me that Wireshark was trying to load c:\docume~1\admini~1\locals~...
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0answers
85 views

Intrusion detection - curating misuse/signature based detection data

I have been researching intrusion detection for a class I am taking and I have come to a certain point where after reading so many articles the difference between the two seems blurry. Anomaly ...
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0answers
2k views

Anyone can identify tool used to perform this attack?

recently I've identified that some hack attempt was performed at one of my servers. I have dumped nginx logs to github, please take a look and try to identify which tool was used to perform this ...
2
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0answers
227 views

What attack can be detected from SDN controller-flow information? [closed]

Edited. Sorry for my "too broad question" previously. Suppose that kinds of attack that I want to generate are these 4 big types of attack, DoS, R2L, U2R and Probe or scan attack by using appropriate ...
3
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1answer
299 views

Monitoring an uninvited guest on my WLAN? [duplicate]

At home I configured a common, residential, consumer-grade wireless network. It is build from a Broadcom router connecting a few personal devices (i.e. my laptop & smartphone) to the Internet. My ...
2
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1answer
975 views

Tap-mode IPS vs IDS

It is my understanding that tap mode IPS, unlike in-line mode, is passive and cannot prevent attacks. In that case, what is the difference between an IDS and a tap mode IPS? I've checked out several ...
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3answers
957 views

MAC address of source in RDP session

In a forensic analysis I analyzed the event logs of the affected machine and saw various RDP sessions from XYZ IP address. However to prove that the source IP was not spoofed is it possible that I ...
2
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1answer
70 views

Counting on firewalls only : sound security strategy to prevent intrusion?

I had this discussion with a friend of mine who is a windows sysadmin. He said to me that for his company's IT security, he is doing only updates on the windows server. But except these system ...
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3answers
189 views

Is there a way to secure a Linux machine in a way that no one else (but me) can access its contents? [closed]

And I mean, even if someone tries rooting with a Live CD, even if one takes the HDD away and plug it in somewhere else, etc... I want to be able to give a client a machine with a service running, but ...
4
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1answer
156 views

Detect PC Boot from Live CD

is it possible to detect a boot-up via live CD (eg. Ubuntu, Debian, Tails ...) that happened in the past? If yes, where can this information be obtained? I suspect my PC has been booted through a ...
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2answers
171 views

Understanding the behaviour of existing eavesdropping techniques

I am studying the behaviour of existing eavesdropping techniques (part of my research). I have a question through the following scenario: Suppose Bob lives in New York and wants to listen (i.e. ...
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1answer
85 views

Host Based IDS with syscall monitoring

Hey Guys I am a newbie in security stuff and now I am working on my final project about host based IDS. I have some questions to you guys Can a rootkit be classified as an intrusion or is it a ...
1
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0answers
610 views

SSH intrusion suspected: Logwatch report versus SSH log file entries

My Web server's Logwatch report shows ssh and su activity that should not be there: sshd: Sessions Opened: deployer: 45 Time(s) su: Sessions Opened: root -> deployer: 8 Time(s) ...
2
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1answer
603 views

How easily will the vBulleting data from vBulletin and Foxit be cracked? What data is at risk? How was it encryted?

vBulletin Solutions and Foxit Software were breached. The culprit (ColdZer0 or Coldroot) claims to have data from 479,895 vBulletin Service and Foxit Software accounts that include identifiers, ...
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0answers
60 views

How many accounts are affected by the vBulletin breach? At risk? [closed]

vBulletin hack(s) have affected vBulletin, itself (security questions and answers, salts, and hashes of more than 300,000 users of the 345k known to be registered), and Foxit Software (some data for ...
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2answers
72 views

Access LAN services through malicious web page

Suppose that a user on a corporate network has access to a private FTP server, or intranet site, that's only available on the Local Area Network, available at http://internal.example.com. If an ...
2
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1answer
87 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 ...
4
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2answers
219 views

What is a “roving” backdoor?

What is a "roving" backdoor? I understand the general concept of a backdoor. Emphasis on keyword qualifier: "roving"...