A computer virus is a program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes.

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Can Anti-Virus Software Detect PDF Files with Viruses

Sometimes viruses are embedded in other files, like PDF and Word documents. Can antivirus software, like Kaspersky Internet Security, detect these files (PDF files, say) with viruses and malware ...
0
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0answers
51 views

Undetected virus

My PC has contracted a virus. I noticed weird behaviour from my PC, and investigated the matter. I still don't know how I got infected, but the result is someone having administrator access on my PC ...
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3answers
116 views

Large amount of foreign IPs hitting out firewall, is this automated scans or are we under attack?

I just got put in charge of a network. In the logs on our firewall I noticed that we had a large amounts of machines trying to connect to port 53 as well as about a dozen other ports. Are these ...
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1answer
33 views

Procedure of tranmission of original virus [closed]

If website A is having a video with a virus, then if we watch that video through another website B (like dirpy dot com or getaudiofromvideo dot com), is there mechanism for the virus from website A ...
2
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2answers
99 views

Malicious programs that takes advantages of Windows vulnerabilities [closed]

I was wondering if the majority of the viruses and worms are created to exploit vulnerabilities of the Windows system (not a third party app), also I would like to see a report. In Windows a normal ...
1
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1answer
91 views

Malware code in WordPress?

I'm pretty sure that we have malware code in our WordPress website - Here is the code in question, it is located at the top of every php file in the website; { ...
33
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5answers
3k views

Can malicious code trigger without the user executing or opening the file?

If a file is downloaded from the Internet, and saved on disk, but is not opened by a user (if we keep autorun off), are there any chances that malicious code (e.g. a virus) in the file could trigger? ...
2
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2answers
249 views

What do I do, I got a virus warning on a webpage

I went to the web address (hxxp://www.asanka.com) (WARNING: BE CAREFUL WHEN VISITING) on Safari, then suddenly I got a warning message [image below] What do I do? I'm freaked out. I have a lot of ...
1
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1answer
96 views

Decrypt a file by knowing the original content [duplicate]

We had some ransomware get into our system a couple of weeks ago, and it has encrypted a large amount of our files. I am wondering, is it possible to figure out an encryption key if I know the ...
1
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0answers
25 views

Pop ups after adware removal [closed]

I have a user who had a program called "Shopshop" running on his system that would cause page redirecting when using Chrome, IE, etc. I was able to remove the infection and extensions and ran AV and ...
1
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2answers
56 views

Fiddler show external requests but not initiated by any legitimate process

While debugging my web application in Fiddler, I found out that there are some suspicious requests to some hotel sites, search requests to google.pl. etc. See below images. Strangely there no process ...
3
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2answers
75 views

How to sanitize archive files?

I am looking for a way to make sure that a particular archive file does not contain any sort of malicious code. From time to time new vulnerabilities pop up (e.g. gzip, 7zip) so I though a good idea ...
1
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0answers
60 views

How to deal with virus causing massive startup delay? [closed]

I have an SSD and normally startup only takes seconds. However recently my PandaSecurity said it detected a virus and needed to restart to purge it. When I allowed the computer to restart, the ...
1
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2answers
123 views

How effective is antivirus software? [duplicate]

On one hand, most antivirus websites claim their products are highly effective, and I've seen antivirus "test" videos claiming 95%+ detection rates for new malware (as in less than a day old, not old ...
2
votes
1answer
150 views

Cryptowall files found, but nothing encrypted

I've got a weird situation here and wanted to see if anyone else has run across this. Windows Security Essentials found Cryptowall on a system here and was able to remove the trojan that causes drops ...
1
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3answers
122 views

How to get started as a Malware Analyst? [closed]

Sorry if this is posted in the wrong section. A little about me: I'm going to be a sophomore in the fall at university, my major is Computer Science (Information Assurance). I've been interested in ...
1
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2answers
44 views

Is there a online filter to check email attachments?

I've just received an email from an old employer. There is very little information in the message sent just: See attached file for your review. Kind regards, Mick with an attachment. I ...
0
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2answers
87 views

Can VPNs prevent information from being stolen by keyloggers screen readers?

What role, if any, do VPNs play in preventing information being stolen by keyloggers and mouse/screen readers? Here's my thought process: Even if malicious software is present on your device, for ...
1
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2answers
331 views

how to detect an encrypted virus

a virus code (x bytes long) is XORed with a x bytes long word (we call this T). This word T is built repeating multiple times a 8 byte secret key. the infected file contains this XORed (obfuscated) ...
9
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1answer
160 views

Virus attached or included in VST(i) Plugin

VST Plugins are DLL files available to be put into a folder in the Music Tool which then can use this as a plugin. Does VST have a mechanism not to execute malicious code inside the dll file? Can I ...
1
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2answers
62 views

Potential worm damage on a physically isolated Tor system

I'm setting up a physically isolated Tor system (with one computer serving as the workstation and another as a Tor gateway), and I'm concerned about methods a worm could use to infect my OS. In the ...
0
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1answer
66 views

Opening mail without any risk [closed]

Before opening unknown email (not in spam folder) how we can identify no any danger inside the mail (with availability of active virus guard)
0
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1answer
216 views

Prevent CryptoLocker on Server

A quick question, which may have a not-so-quick answer - Are there any ways to prevent files associated with CryptoLocker, to be propagated to a data server, by means of a back up? We use Cobian as ...
2
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4answers
355 views

Can any dangerous file(Virus, Trojan, Malware, etc) cause harm inside a zip or rar?

I am using Windows 8.1 pro with Mozilla Thunderbird for my email requirements. I have my Thunderbird set to auto download all email attachments, however upon runnning a Virus scan I am seeing many ...
3
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0answers
54 views

Determine in which process a virus is hiding [closed]

My computer got one of those Recycle bin viruses, e621ca05.exe. It's an old installation of Windows XP and I can't even enter safe mode because it was in a shaky state already. So I can't follow the ...
2
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2answers
896 views

Can I have a virus/adware in my router?

When I browse the Internet (in any browser), there are extra ads. I thought it could be on my computer, tried Ubuntu live disk, and even there were these ads. Same ads are on my iOS and Android ...
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3answers
75 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 ...
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1answer
86 views

Is there a virus that attempted to foil generic decryption techniques, and how did it do so?

Is there a virus that attempted to foil generic decryption techniques? How did it do so? I need to know the virus name, because I tried searching and I am unable to locate any virus that did that, and ...
1
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1answer
137 views

backdoor php trojan still dangerous on my local machine?

I recently removed and fixed a lot of backdoor trojans in some files in one of my servers, and I copied those files to my local computer. But the issue is that now that I run the virus scanner on my ...
12
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2answers
4k views

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 ...
2
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0answers
72 views

Remote accessed? [closed]

I'm not an IT professional but I'm hoping someone will take the time to answer this. I'm not generally such an idiot but this happened: I was using Ancestry.com on Chrome and clicking links within ...
1
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2answers
146 views

Hidden Malware on a windows OS able to startup [closed]

How do hackers hide there malware on windows, to startup and be impossible to find then delete. The results I found that a hacker can use to hide his malware: (found here) Windows: Setting hidden ...
1
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1answer
183 views

I think i might have accidentally clicked a phishing link, how can i be sure? [closed]

Long story short I might have accidentaly clicked a phishing link is there any kind of test I can do or anything I can do to check?
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1answer
91 views

Stuxnet - The background functions [closed]

Stuxnet was a clever worm that aimed to malfunction programmable logic controllers on nuclear networks (Iran was the most affected). Nuclear networks were private networks, not supported on Internet ...
0
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1answer
202 views

What does this malicious JavaScript code do? [closed]

I got this by email this morning before my brain woke up and I clicked on it. Does anyone know how bad this is? It gave me an out of stack space error when I ran it. var ...
13
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3answers
2k views

FTP hacked, planted file [closed]

Can anyone help me to understand what this does? Someone has planted a file with this piece of code on my server.It is shortened because it cannot fit the question, but just to have some idea what ...
0
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1answer
91 views

Possible virus hogging bandwidth [duplicate]

My computer might have a virus infection. I have used Norton Internet Security and Power Eraser to scan the computer but it still did not work. The traffic on my PC looks like this I used resource ...
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1answer
132 views

What is the most successful virus/rootkit? [closed]

"Successful" is rated by infection rate. Which virus/rootkit/malware has been able to infect the most computers globally?
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1answer
93 views

Why should I add a certificate to “Trusted Root Certification Authorities”?

I want to use a programm, which lets me modify touchpad gestures. http://www.multiswipe.com/faq But I need to add their certificate ( see in FAQ [ How to install MultiSwipe? ] ) to make it work. ...
2
votes
1answer
130 views

Is there anyway to easily decipher this virus code?

My server was attacked (I cleared the infection - as far as I know) and I want to know what, if anything, might have been compromised (like my user data, for example). I posted my last question on ...
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0answers
23 views

How to remove Cryptowall Locker Virus [duplicate]

I have been getting issues with this Cryptowall Locker Virus, is there any permanent solutions to remove this virus from my pc. I have taken help from ...
1
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5answers
226 views

How can I stop this remote attack?

Someone appears to be logging into my machine remotely, I am running Avast anti virus with Comodo Firewall both report no attacks.I only noticed this because on my router security logs I see the ...
0
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1answer
48 views

Can standalone malware survive on current mobile devices? [closed]

Can malware run on mobile devices? I don't see how it would be able to (given that those devices have fine-grained permissions and sandboxing). Unlike on a desktop OS, malware cannot access registry ...
1
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2answers
1k views

Does Dropbox offer any protection against infected files? [closed]

Does Dropbox offer any protection against sharing files which are infected? To give more info, my friends and I are currently working on a college project. We find it much more convenient using ...
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votes
2answers
97 views

When using software to infect others, how are hackers them selves not infected? [closed]

I assume all hacking software (password cracker, R.A.T. etc...) are infected. So the hackers using it are probably hacked too, right ?
0
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1answer
163 views

How can I tell if my client has been infected with CryptoWall?

Today a client ran a file they believed to be something else, they said a black window appeared, so I checked the code to see what it ran in CMD, but can't quite work out what it's doing. I've just ...
7
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2answers
137 views

Does Android have sufficient app sandboxing?

In a previous question in InfoSec, I asked about how to determine the safety of a sideloaded Android app that requires root permissions. Now I would like to ask a related, but different question: Is ...
8
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2answers
968 views

Are there / have there ever been viruses that completely evade virus scanners for very long?

Are there, or have there ever been viruses that completely evade all virus scanners for a long time (e.g. longer than a year?)
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73 views

Protection against Bad USB not working for me

Protection against bad USB as described in this thread by user 10008 in the top voted answer is not working on my PC at the moment. I tried it when trying to install Ubuntu from a Live DVD to a USB ...
1
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2answers
175 views

Possible to detect an/or shut off CryptoLocker by limiting total network bytes transferred?

Since a virus infected PC has to download (encrypt) reupload the entire file (to a file server), and repeat the process for every network drive, is is possible to detect this unusually high bandwidth ...