Questions tagged [backdoor]

A backdoor is a method of bypassing normal authentication, securing illegal remote access to a computer while attempting to remain undetected.

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2answers
2k views

Would IT Security professionel people notice a backdoor in Windows 7 or SBS 2011 implemented by Microsoft? [closed]

I guess you have heard of Edward Snowden. Papers around the world published that the NSA invests much time, money and effort for a »full take« of the communication around the world. Given this, it ...
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3answers
9k views

backdoors in hardware (ie. intel/amd cpu) possible? [closed]

There are several reports about hardware based attacks on IT-security as for instance those here: http://wccftech.com/intel-possibly-amd-chips-permanent-backdoors-planted-nsa/ http://www.afr.com/p/...
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2answers
675 views

Can AES-256 encrypted data be changed?

I have a file that supposedly contains AES-256 encrypted data. The file was created using a proprietary program that claims to use AES-256. I have tested decrypting the file with an open source ...
2
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1answer
7k views

How to check if your computer has a backdoor installed on it? [closed]

Just some time ago I had this unusual popup from Malwarebytes Anti-Malware (MBAM): I did a quick Google of the IP address and found this thread where the OP is complaining of MBAM blocking svchost....
2
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2answers
133 views

Virus Removal Boot Disks — a few questions

I'm new to working with and using a backdoor/virus with a boot disk. Can they be mounted to a USB drive? What options are out there and what should I look for in one? Are they practical? Do they ...
6
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2answers
2k views

Backdoors after SQL injection?

I just found an injection vulnerability on a live site of a client. It looks like this: $sql = "SELECT * FROM users_dl WHERE Username = '" . $Uname . "' AND Password = '" . $Pword . "'"; I ...
4
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2answers
905 views

How can I find the malicious/backdoor codes without knowing the last modified date?

Last night my website got hacked and attacker edited the main index.php. I was wondering even he edited that file, the last modified date did not change. so I just worry if he would put the backdoor ...
-11
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1answer
591 views

Hacker problems - They stole my backups [closed]

I am facing an issue where hackers are seeking to compromise two of my servers. They succeeded in wiping out both and stealing my backups. I had off-site backups and I am back online. Nonetheless, I ...
1
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5answers
2k views

Site backdoor & eval()

I'm running a Joomla 1.7 site which was hacked today. Below script did the hack. eval((base64_decode("...
91
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7answers
5k views

How do I know a piece of software only does what the author claims?

Without being a programmer or a computer expert, how can I know if a particular program or any piece of software in general doesn't have hidden unwanted functions compromising privacy and security?
3
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1answer
887 views

Backdoor.ASP.Ace.C keeps showing up and being removed by f-secure

Backdoor.ASP.Ace.C is being found and removed from: C:\Users[username]\AppData\Local\Temp[randomstring] We have recently found some malicious aspx files on our IIS server that we have studied and ...
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6answers
1k views

Could a computer program be used to automate testing for trapdoors?

Could a computer program given the source or object version of another program be used to automate testing for trapdoors/backdoors?
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3answers
4k views

Disable Perl for some/most Linux users?

One of my server's web accounts got hacked a couple of times. Each time someone downloaded a Perl script via some phpBB forum and used the Perl script to do whatever they wanted to do (mostly connect ...
3
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2answers
715 views

How do hard-wired backdoors work?

How can a vulnerability be hardwired? Just read this article, which got me thinking. Is there simply vulnerable software running on a piece of hardware that is read/write only or..?