Malware is any software application which subverts the will of the legitimate owner of a computer, by means of force or subterfuge, with or without personal or monetary gain on the part of the creator.

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Is it possible for a file that is non-executable and read-only to run malicious code?

On a POSIX system, is there a possibility for a file which is non-executable and read-only (aka with a mode 444) to run malicious code on a machine? If so, can you explain how it would do so?
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Why do malware creators use such clever technologies for such silly purposes?

Some days ago I got infected by a malware, probably something new and very clever, as it went in unstopped and no scanning tool was able to detect it afterwards (see this question). It was a ...
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Malwares source repositories. Where? [closed]

As the best way to learn is to read the code, do you know where I can find malware/virus/whatever source code to read?
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How to deal with a person who gets easily fooled by internet and mail scams?

alternative title: How to deal with a person who has gotten paranoid and doesn't want to go online anymore? A person, who has over the years been scammed many times, by bad spam/fraud emails, and ...
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Malware - are removal tools acceptable or is bare metal re-install the only safe option?

I see a number of companies offering "malware removal" services. I see some software that claims to be able to remove malware from an infected machine. Is using a removal software tool to 'clean' an ...
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The Perfect Mousetrap - Can a sandbox system be designed such that it's identical to an actual computer? [duplicate]

In testing suspicious files for malware, the typical method is to search for known malicious code. This is why zero-day malware attacks can be so dangerous — their malicious code is previously unknown ...
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URL Shortening - How to verify if it is a non-malicious URL?

Again, I must mention that I have just started to learn about security. So, please bear with my newbie questions. If I receive a shortened URL from somewhere, say in an my-email or in a social media ...
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Can home routers get infected?

I am behind a router(linksys that runs dd wrt on it) and I was infected with sality. I'm curious, can my router get infected too? If yes, how can I remove the infection? I used the search bar but ...
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Becoming a malware analyst?

So, I'm currently 16 and am considering a career in IT when I finish school. The thing that has intrigued me the most while growing up is malware. I've come across it so often and have often had to ...
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Could once infected machine be ever trusted again?

I'm just about to switch to a new SSD drive, so I figured it's a good occasion for a really, really fresh start. I reconsidered every installed piece of software, uninstalled lots of crap ...
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What are the security implications of people downloading addons, wrongly thinking that they are safe?

I recently learned about a plugin for Firefox called Fire Sheep, which was featured on the Security Now podcast. I downloaded F.S. and began examining it. To my surprise it includes C++ code that must ...
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Is there a real possibility of getting malware by “drive-by”?

I know malware can be gotten by downloading and running stuff, but is there a real possibility of just viewing a webpage or clicking a link and getting one? Assuming using only Firefox / Chrome and ...
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Why do rootkits hide in drivers?

A lot of rootkits for Windows (maybe even Linux?) do hide in drivers. Why is that? One reason I can think of is that using a driver they run in kernel mode and have full system access, but aren't ...
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How Do Rootkits & Other Low-Level Malware Still Manage to Load on Systems Protected by Secure Boot (and TB/MB)?

Let me try asking my question this way... Let's say that I'm a offensive cyber Bad Guy working for a foreign state-sponsored Advanced Persistent Threat unit. My unit is charged with, say, stealing ...
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Do I really need an Anti-Virus software if I'm careful about where I browse?

A friend told to me the following: I don't use Anti-Virus software at all, I am just careful about where I go and what I click on. I've also heard this from other people as I've repaired their ...
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Finding a specific malware sample for malware analysis purposes

I wish to analyze the changes made by a specific virus. For example, Win32.Sality. Where can I get the sample of this, or other similar, malware for testing?
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Methods of mitigating threats from keyloggers

I am concerned about keyloggers being installed on my system and transmitting sensitive data out of our network. Is there a common method that such malware uses to send its collection back to the ...
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How is it possible to embed executable code in an image

I was reading up on FireEye and came across this NYTimes article detailing a Skype chat where an image was sent that was laden with malware: Quote: To gain access to information on the ...
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How is a worm different from a virus?

In spite of various online articles, I'm a bit unclear on the distinction between a "worm" and a "virus". Two related questions-- Is there a useful and clear distinction here or no? If so, what is ...
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Is it possible to make a phone call appear to come from another phone, even to the network provider?

Quick Question Is it possible that I could call a mobile number, but have the call forwarded through another number active on a different phone that someone else has? I have had unlimited access to ...
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Recommendations for honeypot software

A couple of us wanted to setup a honeypot/honeynet with the goal of learning; not planned to be in a production environment. What's a good recommendation for a high interaction or low interaction ...
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Can a .sh file be malware?

Can a .sh file be a virus or something harmful? Is it like .exe files on Windows? If yes can someone read this script and tell me if it safe and is it effect any how on gpg security. It gives me an ...
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Can a guest virtual machine be compromised by a virus on the host machine?

All questions ask about the other way round, ie. can a virtual machine compromise the host. But I'm asking can a virus on the host machine compromise the guest virtual machine?
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Router being infected by malware

If you connect a computer that is infected with malware (the government grade, kernel infecting, extremely persistent, easily spreadable kind) to a router or modem, can the router or modem or its ...
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Can a PDF file contain a virus?

Could a PDF file contain any type of malware?
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1answer
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Why do exploit kits use droppers?

I've been looking into the structure of the online criminal underground, which consists of exploit kits, droppers, and malware payloads. What is the function of the dropper in this pipeline? Why ...
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Unknown malware, how to report it and whom to report it to?

I'm a professional Windows system administrator, but I've been caught off-guard (or maybe some malware writer has been very clever) and I caught some unknown malware on my home computer (Windows 7 x64 ...
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What is the risk of giving USB drives as promotional items by a healthcare provider

There have been a couple of instances where malware infected USB drives have been given away unknowingly as promotional items at conferences, e.g., IBM in 2010. Besides this, if a healthcare company ...
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Detecting malware-infected USB drives

I'm about to distribute some relatively cheap promotional usb drives to some of my company's clients. I'm fairly confident the company I purchased them from wouldn't intentionally implant malware on ...
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remote desktop connection to a potentially compromised machine

I am using rdesktop client on Linux to connect to windows machines. If some of these machines were compromised by some evil malware/virus/worm/trojan, is there any way for the malware to "jump" to my ...
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Pursuing a career in Malware Analysis

When I was a kid, I want to become a Malware Analyst and work in a Antivirus company. At that time, I love to try out different antivirus solutions and did a research project on Computer ...
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1answer
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Oligomorphism vs polymorphism vs metamorphism in malware

What is the difference between these three? As I understand it, polymorphic malware code actually is always the same, and it's just that it appears to be different (through encryption, data ...
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Detecting reflective DLL injection

In the past few years, malware (and some pen-test tools like Metasploit's meterpreter payload) have begun to use reflective DLL injection (PDF) to load a DLL into the memory of a process. The benefit ...
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Skype called someone and connected to them with no action on my part. What do I do?

This happened to me today, September 12, at about 6pm. Any ideas about what happened, what's going on, and what I should do? I was at home alone with my 2 year old -- I was feeding her dinner. All of ...
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Detection and analysis of unknown malware

Suppose I have a binary which is suspicious. How can I determine whether it is malicious, and if it is, reverse-engineer how it works and what it does? For example, maybe using static analysis? Are ...
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Checking if notebook is clean of hardware spyware

Are there any simple steps one can follow to verify if a notebook is clean from hardware spyware? What should be looked for? How should it look? If any visual tutorials with photographs are ...
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Ads appearing in our application when they should not be

I received a strange issue reported by one of my web application users. Apparently they are getting "ads" within the browser window when using my application. I didn't add advertisements at all. It's ...
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Sites being redirected to adult site in all devices [closed]

From past couple of days, we are facing this issue where sites are automatically being routed to an adult site, although we get a 404 Not Found HTTP error. First guess is obviously that my system is ...
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How serious is InstallIQ?

Background: Recently I've seen hits for InstallIQ a "potentially unwanted application" from ESET. From what I can find it seems like this is an installer wrapper that asks people to install other ...
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How can a malicious URL affect a computer?

Many security experts advise not to click on malicious URLs. How can clicking a URL affect a computer's security? If a malicious file was downloaded and executed, then a computer's security may be ...
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1answer
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How to study the packets sent by a keylogger

One of my friends runescape account got hacked through key-logger. He downloaded a runescape gold generator from a file sharing site and tried to use it. I have a strong doubt that it is a key-logger. ...
12
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1answer
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Where is the best place to get descriptions of malware?

I'm looking for a source of descriptions of 1990s to early 2000s malware; I have searched for a very long time yet found very little. I require information such as payload activation dates, files ...
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1answer
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Malicious PDF Analysis

I have been analyzing a PDF I suspect to contain malicious content. For the most part, I've always trusted automated tools to determine if a PDF was safe to open. However, my eyes have been opened to ...
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What does this injected code do?

One of my sites has just been hacked as this code has been inserted into random(?) files and places within the files. Does anyone understand what it is trying to do? I would welcome anything that may ...
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How to deobfuscate this PHP malware?

Two days ago a file called "images.php" appeared on a friend's server, which he noticed because it caused errors. The file contained the following. This code is of unknown origin and presumed to be ...
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Can a mobile phone battery contain malware?

It has 3 terminals and is presumably a smart battery. I bought it on ebay recently for $2.74 USD and that included postage from China to Australia. It would normally retail for maybe $40 - $50. The ...
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2answers
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Where do I find JavaScript malware?

I am looking for JavaScript malware. I need it just for local tests on my computer for a project I am working on. Are there any Internet resources where I could find this?
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Security of root terminal (su -) when logged into X

I often log into X as normal user (of course), open terminal and switch to root: su - I have then a terminal owned by user but effectively with root privileges. Are there any security issues in ...
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What would happen if one of the popular Linux repositories is hacked?

Even though most people consider downloading your Linux software from you own distribution's repositories as safe, thinking about the scenario where a repository gets hacked sounds thrilling. What ...
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Retrieve files from possibly infected USB

I work in a lab environment, and save data to a shared PC. This PC is not networked, and so the only way to get the data from that PC to my own, is through USB. The lab director has mentioned that the ...