Questions tagged [detection]

Detection is the act of discovering and/or determining the existence, presence, or fact of something.

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29 views

Ransomware aversion and identification techniques

I don't think there's a need to go into the background here, but identification of the process may be better explored. From a developer pov, at a high level, the files are modified, by virtue of the ...
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1answer
86 views

How can I as middleman verify whether a phishing site is valid if the scam listens only on the referrer link and blocks any other access methods?

How can I as a trusted user of a middleman company (such as PhishTank) verify whether a phishing site is valid if the scam listens only on a unique referrer link(randomly created) and is blocking any ...
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1answer
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Does the term “malware signature” always refer to a pattern of bytes? [duplicate]

I know that traditionally a malware signature is a pattern of bytes in a program. While reading Joxean Koret and Elias Bachaalany's "Antivirus Hacker's Handbook" I saw that the authors categorized the ...
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Yara condition count operator with wildcard [closed]

I have a yara rule that looks for multiple strings in a file and fires if the count is greater than 3. But how would I change the condition statement to only fire if greater than 3 but less than 5? ...
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1answer
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What is “rule-based” analysis in malware detection?

I've read a few articles that describe the heuristic detection used by AVs as being either "weight-based" or "rule-based". The weight-based aspect seems to make sense, but I don't understand what "...
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Snort rules to detect metasploit's trojan [duplicate]

I'm currently working on Snort and I'm trying to detect meterpreter sessions in reverse TCP or HTTPS, a Trojan ... Does anyone know snort rules in order to detect this? Despite my research, I found ...
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44 views

Are all “behavioral detection” of malware a form of heuristic detection? [duplicate]

A lot of articles I read seem to lump behavioral detection together with heuristic detection. From what I know, one of the defining features of heuristic detection is that it can be used to detect new ...
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46 views

Antivirus and it's role in detecting payload execution?

My first question is this: 1) Antivirus software works using signature based detection. Signature based detection evaluates items (maybe not the right word?) based upon a big database of known threats....
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Detecting cracked Themida packed malware

I'm working in a large SOC and my manager has tasked me with finding some way to provide coverage for Themida packed malware samples. As alluring as it is to suggest just blacklisting all Themida ...
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1answer
111 views

What are the heuristic detection techniques most often used in modern AVs? [closed]

Whenever I read books or academic papers and the subject of heuristic malware detection is brought up they always say the same thing: "it can be either static or dynamic", "it may use emulation", "may ...
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1answer
298 views

What is an Albert sensor?

Recent news articles have started to talk about government networks deploying "Albert sensors" (e.g., this article). What is an Albert sensor? And how effective is it? Going purely from context, it ...
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39 views

Assess anti-malware detection techniques

Are there any known, conventional, ways of assessing the types of detection techniques an endpoint security product might employ? I know AV-Test and AV-Comparatives exist to test the effectiveness of ...
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1answer
641 views

Can my father's smartphone be compromised?

My father said to me that he allowed installation of apps from unknown sources when he was asked to do it to go further with something (he said that don't remember when or what he was doing). In ...
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2answers
197 views

Why malwares need to be light

I am learning about how malwares work and I read that a lot of them are written in assembly or C to keep the binary size as small as possible. In an example C++ source code, authors decided to remain ...
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1answer
1k 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
147 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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6answers
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Is it possible to detect 100% of SQLi with a simple regex?

I'm wondering if it is possible to detect 100% of the possible SQLi attacks using a simple regex. In other words, using very simple PHP code as an example: if (preg_match("/select/i", $input)) { ...
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19answers
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Has it been mathematically proven that antivirus can't detect all viruses?

What analysis was Bruce Schneier referencing when he wrote: Viruses have no “cure.” It’s been mathematically proven that it is always possible to write a virus that any existing antivirus program ...
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1answer
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How can I detect an infection in a database?

Detecting infected files in a website or web application is very easy: you just need to compare the files with a clean backup or the original source (for example with diff) and that's it. However, ...
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What makes detection of optimized-away memory clearing non-trivial?

In this 35C3 talk, it is said that while it is possible to manually inspect whether a package optimizes away memset() that clears sensitive memory, doing it automatically would be challenging. ...
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2answers
244 views

Should you consider a system compromised if someone could have physically accessed it, but you have no evidence they did?

An old adage is that if an adversary physically accessed your system, you should consider it compromised. My question is, what if they could have, but you have no evidence they did? For example, let ...
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1answer
104 views

100% detectable backdoor attacks on network

Every article I have read on backdoor attack prevention says pretty much this: Protecting against them may be difficult. I am tired of reading how it can be ~difficult~ to protect against. ...
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151 views

Heuristics-based vs behavioral malware detection

I'm working on my thesis and I have a couple questions about differences between heuristics-based and behavioral malware detection. Does heuristics-based detection rely only on statically examining ...
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1answer
57 views

Does Real-time typing view in chats invades privacy? Are there any detection and prevention methods?

When a customer talks with a representative of a company in a chat on a web-page, it is possible that they are actually sending every keystroke to their server before you hit the enter or click the ...
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1answer
63 views

Detecting if an agent is listening to specific messages

Is there a way to detect if an agent Z is listening to (and acting on) messages from Y? I can observe the messages that Y sends and the actions that Z takes, but I know Z is also listening (and acting ...
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1answer
282 views

Error detection capability of SHA-256

If we use SHA-256 checksum to detect corruptions to a file, what is its capability in terms of missed errors? For example, reading the page about error correction and detection here, under the ...
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Is it possible that a usb drive manufactured 3 months ago can have data copied to it that shows the file last modified date before manufacturing date? [closed]

I have some data that needs to be handed to a friend. I don't want to give the original drive (drive-1), so I plan to purchase a drive (drive-copy) and copy data to it. The data copied will still show ...
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5answers
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Can Beehive detect a Snowden-like actor?

In a seminar, one of the Authors of Beehive: Large-Scale Log Analysis for Detecting Suspicious Activity in Enterprise Networks said that this system can prevent actions like Snowden did. From their ...
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2answers
135 views

If a file on USB drive shows a certain “date modified” time in the windows explorer, can the correct added date/time be checked for the file?

If someone copied files from a drive-1 to usb-drive-2, then it seems the directories and files get the original modified time from drive-1 in some cases and in some cases not. Can it be checked if ...
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1answer
56 views

How can one make sure that some specific directories are fully deleted (without any record of their deletion) from a USB/flash drive?

It seems data resides in USB somewhere until it's completely overwritten. But is there a way to delete big directories 10-100GB or so without zero-filling the remaining space and only eradicating ...
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51 views

Detecting network attacks by processing individual or multiple network packets?

I am trying to create a tool that identifies network attacks using machine learning, something like a small intrusion detection system. I have collected benign traffic from the network and then ...
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1answer
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Can I use `lsof` to reliably determine which local process has connected to my open port?

Say I'm running a server application on 127.0.0.1:7646 and a local process (possibly owned by a different user) connects to it, I can run lsof -Fp -i TCP@127.0.0.1:7646 -i TCP@127.0.0.1:<...
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2answers
275 views

Datasets dedicated for SIEM systems

I am looking for data sets published by researchers or freelancers which can be used for the purpose of SIEM testing and evaluations. The goal is to test the classification (and later correlation) for ...
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5answers
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How to detect when files from my USB were copied to another PC?

I accidentally gave my USB to my friend and then I realized it had some important files of mine. Is there any way I can know if he got something from the USB?
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1answer
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How to restrict plugins/tools like Netcraft and Builtwith to detect server side technologies?

My organization wants to restrict all the plugins/tools like Netcraft and Builtwith to detect all the server side technologies for security reason like platform, operating system name and version, web ...
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1answer
462 views

Why dont anti-viruses detect encrypted viruses in decryption?

Some viruses are encrypted so that the anti-virus cant identify them, but what i dont understand is, why wouldnt the anti-virus doesnt detect them, considering they have to decrypt themselves before ...
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2answers
251 views

How to find what files in a zip are malware using Virustotal

I have a malware infected android phone and I am suspicious that some of the binaries in system/bin/ and system/xbin/ are malware so I decided to dump the system and zipped the contents of bin and ...
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139 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:...
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2answers
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Is there an easy way to detect clients that ignore certificate validation errors (in production)?

I see this happening allot: developers need to test stuff, have a self-signed certificate that causes an error, and they just switch verification off globally (like in this example). The hack gets ...
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How can identify potential malware from the list of sessions established between my PC with devices on the internet [closed]

I wish to know if there are any software tool(s) that allow me see all established sessions from my PC and flag those connections that are potentially malware. I prefer GUI type tool but will also ...
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1answer
132 views

Audio steganography and DRM

I recently made a post about an audio steganography program and had another concern I thought I might ask. I understand that most music has DRM in them. If I hide secret files in audio files with DRM ...
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1answer
364 views

How to create a proxy so that no website or web service can know that I am connecting through a proxy?

I want a proxy, preferably my own but I would be glad if there is a reliable service already, that is undetectable. Obviously, it does not send X-Forwarded-For. But it has to be much more than that to ...
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134 views

Which Anti-Virus companies share their signature databases?

I recently heard that AVG and AVAST shared their malware signature databases (avast forum) Which AV vendors share their signature databases or use the same engine for detecting malwares? Based on ...
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254 views

How can XML External Entity attacks be detected?

XML External Entity attacks have been identified as an OWASP top 10 web application vulnerability. Whilst there seems to be extensive information on what an XML external entity attack is and how it ...
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1answer
297 views

MITM based on ARP spoofing

I fail to understand how a MITM attack sniffs packets and modifies them.In the case of ARP spoofing although the attacker has spoofed the MAC address of a host, how does he modify it? if he listen to ...
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What caused these massive spikes in malware sites detected by Google in July 2012 and January-February 2014?

Google's Transparency Report shows pretty huge spikes in malware sites detected by crawlers in July 2012 and in January/February 2014. I can't find any record of what these spikes were caused by ...
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62 views

Motion sensors - detectable when using mobile network?

Motion sensors are a good way to be informed of any activity at our house. Many modern motion sensors have the possibility to notify the user using an internet connection using Wi-Fi or even mobile ...
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219 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
156 views

Why arent all hackers traced ? ( network based attackers or malware which communicate with CNC servers)

When hackers use tor or irc or proxies to attack or use CNC servers behind these to evade. Why can't they be traced? For example, something like wanna cry or any other known malware, when something ...
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2answers
156 views

Impossible VM-detection countermeasures [closed]

Are there any vm-detection techniques (of malware) which are impossible to mitigate in your vm? If yes, which?