Tagged Questions

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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5
votes
2answers
2k views

How would I go about rebuilding the IAT of a packed executable?

When executables are packed with a tool such as UPX, the real code and data sections are encrypted or obfuscated, then loaded into memory using an injected decrypter stub. This makes static analysis ...
7
votes
3answers
2k views

attack/abuse notification email template

I'm building a template for use when sending "abuse" notifications to ISPs, hosting providers, etc., for when attacks originate from their netblock. Are there examples of templates used for this ...
4
votes
2answers
543 views

Can a malware jump from a virtual to the physical machine? [duplicate]

Possible Duplicate: How secure are virtual machines really? False sense of security? I found out that malware authors check if the hard drive volume name, or network card MAC matches ...
2
votes
2answers
277 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?
0
votes
2answers
751 views

Is a VPN the only way to protect against rogue Wifi access points MITM attacks?

Given that it's very easy set up a rogue access point and MITM that connection, is a VPN to a trusted host the only real way to secure my browsing and other TCP/UDP actions? This question relates to ...
16
votes
5answers
964 views

Why would a virus writer bother to check to see if a machine is infected before infecting it?

I was looking at the tripartite structure of a virus, and it seems to check to see if a computer is infected before infecting it with the virus. Would this be an attempt to use files that are already ...
6
votes
2answers
353 views

How a malware executes remote payload

Let's assume a malware was installed (on a UNIX-based platform) with some social engineering tricks. The original installed code itself may be benign, but the only malicious activity is that the ...
4
votes
2answers
444 views

What is disk encryption worth? Threat of proprietary Bios, SMM, optionrom, TPM etc?

Supposing there is private/secret data on a machine (i.e a x86 arch) the most reasonable thing to me would be to encrypt this data, so to protect it. I understand that the purpose of ...
4
votes
1answer
397 views

In the light of recent information about RarVM, can we still trust RAR files?

See: http://blog.cmpxchg8b.com/2012/09/fun-with-constrained-programming.html https://github.com/taviso/rarvmtools It would seem according to these two sources that rar files can contain custom ...
9
votes
2answers
3k views

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 ...
19
votes
4answers
2k views

Are anti-virus companies companies regularly committing software piracy?

As Mikko Hypponen highlighted in a recent tweet, anti-Virus companies collect and store both samples of malicious software and samples of legitimate software: This got me to thinking, what ...
7
votes
2answers
347 views

How do AV vendors choose malware names?

If you take a look at McAfee's recent malware page, you'll see that the names in the "Malware name" column aren't very human-readable: Downloader.a!cnz, W32/Autorun.worm.bgh, ...
4
votes
2answers
359 views

How can I recognize and find file(s) dropped by malware?

Suppose I am doing malware analysis. How can I recognize if, during the analysis process, a piece of malware dropped a file in my system, and if so, the path of the file? What are the procedures, ...
2
votes
1answer
181 views

What authentication threat data exists?

I recently read an article that said there was not much data on which authentication threat vectors were actually being exploited in the real world. Eg what percent of password theft was by ...
-1
votes
2answers
7k views

Malware or buggy software gives Low Disk Space warning

Since a few days, I am getting an alert that in my c drive disk space is low. When I verified, free space in my c drive was decreasing hour by hour and there was a stage when it simply said that 0 mb ...
20
votes
2answers
2k views

From a technical standpoint, how does the zero-day Internet Explorer vulnerability discovered in September 2012 work?

I'm looking for an answer that explains the issue from the prespective of a developer/engineer. What is exactly being exploited and why does it work? Please note that I am not looking for ...
2
votes
1answer
124 views

How did DNSChanger rogue name servers work?

I know DNS changer, changes DNS server with its own Evil DNS server on an infected computer, then the DNS servers point to their own rogue nameservers and the nameservers change the ads on websites ...
4
votes
1answer
420 views

Is Window's system restoration useful for getting rid of malware?

If your computer has been infected with some kind of malware, could a restoration of the system, using the tool provided by windows, help you getting rid of that malware? We should suppose that it ...
5
votes
3answers
4k views

Javascript Malware: How does it work, and how can it be mitigated?

I am wondering how malware gets served through Javascript. I've noticed a few illegitimate pop-ups while visiting some financial websites. I wonder how malware exploits work against the application ...
5
votes
6answers
6k views

Can i get 100% protection from virus by using Deep Freeze?

I have recently installed an application called 'Deep Freeze' that works by "freezing" the state of an operating system and working off delta disks. Rebooting deletes the deltas and reverts back to ...
3
votes
1answer
565 views

What is known about the sirefef/zeroaccess malware/botnet?

There appears to be an increase in p2p communication among botnets that has been attributed to the sirefef/zeroaccess malware botnet. What is known on this particular threat?
20
votes
2answers
804 views

Cohen's problem

Fred Cohen determined theoritically that viral detetction is an undecidable problem. Can anyone provide an intuitive reasoning for that? Background Fred Cohen experimented with computer viruses ...
4
votes
1answer
3k views

What can I do to make sure my computer isn't infected with FinSpy?

What steps have been taken by common free software OS distributions to protect against it? What can Windows users do? What ways are there to rid a system of it?
7
votes
3answers
4k views

How to manage admin rights for helpdesk staff?

My question is about issuing administrative rights to helpdesk staff in a large Active Directory setting. Helpdesk staff commonly require administrative rights to provide support for end users. I ...
2
votes
2answers
9k views

How does Remote Access Trojan / Backdoor Software work?

How does the RAT works? I understand it as once we surf the infected website, browser might download the trojan to our PC automatically. Will it executed and auto install in our computer? I can't ...
6
votes
2answers
7k views

Can Keyloggers get passwords from Windows 7/8 Logon Screen?

If yes, do you know some examples of Keyloggers capable of perform this? EDIT: I mean when logon in the windows right after power on the PC and/or when locked with Win+L.
6
votes
3answers
696 views

What methodologies are useful when reverse-engineering malware / shellcode?

Whilst I'm familiar with reverse engineering techniques from a technical standpoint, I've never found a good methodology for approaching and dissecting malware / shellcode. I've found hundreds of ...
5
votes
7answers
3k views

How to safely view a malicious PDF?

I have a PDF with important information that may contain malware. What would be the best way to view it?
13
votes
6answers
4k views

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?
3
votes
5answers
1k views

How can I know if my PC is getting infected?

I have installed an antivirus, but as no antivirus is perfect, what can I do to diagnose if my PC is getting infected? For example, keeping a close eye on what programs and tasks run when I turn my ...
3
votes
2answers
560 views

Why do I get AV alerts when browsing a web page?

I'm using the latest version of Firefox and Windows is up to date. When I was browsing a webpage and clicked a link the browser displayed "connection has been reset" and AVAST poped-up saying "Alert!" ...
1
vote
1answer
161 views

Appilicability of Theoritical Computer Science/Formal methods in Malware research

I would like to know the importance of Theoritical CS/Formal methods in Malware research. Due to the large volume of new malware variants received per day (~50,000 samples/day according to McAfee), ...
39
votes
3answers
2k views

Mars Curiosity Rover Security

Does the software in the Mars Curiosity Rover have any security features built-in? I can't imagine how someone would hack into it, but if the rover does indeed have some protection against malicious ...
0
votes
1answer
400 views

How securely use Firefox Add-on to prevent steal data?

Some videos on YouTube demonstrate how a Firefox extension can collect login information used to login to websites such as Facebook. After installing this tool/malware as Firefox Add-on, I observed ...
1
vote
2answers
146 views

Preventing Client PC's from accessing C&C machines

At my office I find us constantly fighting with malware. All users run under the "user" level, we have McAfee and have recently reviewed the Best Practices guide to ensure we adhere to it, all of my ...
4
votes
2answers
5k views

Security Alert - Office File Validation - how to decide whether to proceed?

Recently, when opening a Microsoft Word document that came from a trusted source, I received the following warning message: The warning message is titled "Security Alert - Office File Validation". ...
1
vote
1answer
817 views

on stack execution on windows 7 :: metasploit :: meterpreter :: executable crypter

I posted this on stackoverflow, was advised to move it to security section. I was writing an executable crypter as an exercise with goal of Antivirus evasion, now the problem is the final executable ...
15
votes
2answers
659 views

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 ...
2
votes
2answers
2k views

What are the most common infection vectors for personal computers?

We have OWASP to tell us about common security vulnerabilities in webapps and such, but what are the most common infection vectors for personal computers? A few example vectors: Social engineering ...
2
votes
4answers
757 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
3answers
262 views

Find changes and modifications made to system by application or virus,

I would like to use either Hyper-V or Vmware to take a Clean Base snapshot and a snapshot after an application or virus has made changes so I can then see what was changed between the two images. ...
3
votes
2answers
876 views

How do browser injections work?

I've heard many times that malware like Zeus, SpyEye and Citadel are able to do browser injections to steal credit card data. How do they do it? how do browser "injections" work? How are they able to ...
-1
votes
3answers
250 views

How to find & remove twitter spambot?

Sometimes i can see that i've "retweeted" some tweets , that i actually didn't. And all of them spam to some gaming & pharma websites. I've got windows 7 64bit, norton internet security , using ...
3
votes
5answers
420 views

Can web application do anything to prevent risk from client-side malware?

Client side malware (keyloggers, screenscrapers etc.) is a great risk. It can't be effectively stopped from side of ordinary application. Only users themselves can do some measures to prevent risk ...
6
votes
4answers
483 views

Would running VMs inside of VMs be a more secure way to study viruses, etc?

I was reading this post on SuperUser, and it made me wonder about security. I've read somewhere else that some viruses/malware/whatever CAN break outside of a VM... and then infect the host OS. BUT, ...
0
votes
1answer
357 views

Can the FiddlerCore library be used for Malware (e.g. MitM attacks)?

I've used the excellent Fiddler web debugging software before and have recently come across the Fiddler Core headless .NET library which gives you all the abilities of Fiddler in library form. It's ...
-3
votes
2answers
212 views

Malicious Script [closed]

Any idea what this does? === ...
4
votes
4answers
13k views

How to prevent my website from getting malware injection attacks?

My website was banned as a malware website by Google. When I checked the code, I found out that some code injected many files on my server. I cleaned everything manually, edited all files on my server ...
4
votes
4answers
394 views

Malware that uses http as a covert channel

I'm working on a http traffic analyzer and I need a collection of malware, which uses http as a way to get commands and respond, to analyze their network behaviour. Is there any database of malware, ...
2
votes
1answer
512 views

Intepreting PE (Portable Executable) headers of suspicious malware files

I am starting up on malware analysis, and I am analyzing a file to see if it is packed or obfuscated. Using PEview I am examining the .text, .rdata and .data headers. I know that if there is a big ...