Related to security concerns specific to the Microsoft Windows operating system itself. For security of applications that happen to be running on Windows, please use [appsec]. For the X Window System, please use [x11].

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3
votes
1answer
110 views

Can I trust my antivirus' assessment of my computer as clean, if it previously found threats?

Yesterday, I went to my Recycle Bin (for the first time in a while) to purge a bunch of files I had sent there. When I clicked on the folder, my antivirus warned me of a trojan out of the blue. Later, ...
0
votes
1answer
239 views

Is there a risk that file shredders and free space wipers steal our confidential data?

I was wondering how secure are the file shredding software and free space wipers? Lets say we are using PC Windows, and software CCleaner (from piriform) or File Shredder (found here) to securely ...
3
votes
2answers
113 views

Security of natural Windows 7, 8.1 or 10 behind no firewall

I've often been wondering today in 2016 how secure is truly an up-to-date natural Windows 7, Windows 8.1 or Windows 10 OS on internet behind no firewall other than its internal windows firewall. Is ...
0
votes
1answer
407 views

How to find Windows version from the file on a remote system

I need to find out what Windows and Service Pack system is currently running. All I have is ftp access, it means I cannot run any the software. Is there a way to determine what version of Windows, ...
0
votes
1answer
145 views

A seemingly innocent program is attempting to connect online. Should I be worried?

OS: Windows 10 64-bit updated, usually used for development and Steam-CSGO. Straight to the point: Solitaire just tried to connect to the internet. Details: After tightening my firewall rules after ...
1
vote
1answer
127 views

AirVPN, DNS Leaks on Windows 8.1, but not Ubuntu

I've noticed when I visit dnsleaktest.com using Windows 8.1 & Chrome a bunch of UK IP addresses (Belonging to my ISP) are displayed alongside the Netherlands IP address I should be appearing as (...
0
votes
1answer
58 views

Do I need to change my host OS to something like Tails if I already have Tails running in a VM if I want to be protected on the interenet?

First let me say sorry if I sound like a script kitty, because I am. Now on to my question. So I want to be protected on the internet when I go on the deep web, do banking etc. I use Tails to protect ...
5
votes
1answer
165 views

Is reskinning work computer desktops a practical security measure?

Recently, I opened a new checking account a national US bank. The branch of this bank was very modern, and they even had a wall of screens behind the teller's desk. When I was meeting with an advisor ...
0
votes
1answer
110 views

When NtUnmapViewOfSection is called?

I'm analyzing an executable and I see that it created a process child and within it there was a call to NtUnmapViewOfSection. I know that this method is almost always malicious and can be used for ...
0
votes
1answer
74 views

How does resetting passwords twice increase security after a breach?

In regards to https://mva.microsoft.com/en-US/training-courses/how-to-avoid-golden-ticket-attacks-12134 They mention several times that resetting not only AD passwords twice but also local computer ...
1
vote
1answer
158 views

How can I send a file with DLL to Cuckoo Sandbox?

I want to submit an executable for analysis in Cuckoo Sandbox. The file must be in the same folder with a DLL I have. How can I request Cuckoo to test my exe and make it run properly? (i.e exe and ...
4
votes
7answers
966 views

How to completely remove all traces of a file in Windows 7?

I'm curious to know how to completely erase all possible traces of files in Windows 7. For example, let's say I have a subfolder containing five different files at work deemed sensitive (A document, ...
0
votes
2answers
158 views

How does malware install itself as a service without requiring user's credential?

I order to understand malware, I've tried to create a toy-example myself. However, I don't understand how the malware install itself on the computer as a service, without the credentials of the user. ...
1
vote
0answers
36 views

Problem using custom CryptoNG KSP on IE 11

We are currently developing a custom KSP (Key Storage Provider) for a Key Storage System. We successfully developed a CSP (CryptoAPI) and a KSP (CryptoNG) provider, and both work really fine for ...
0
votes
1answer
61 views

Is it a breach to have a ssh program into a tomcat server

I start to working in a project here and find something that at least seems odd to me. Since I'm not an specialist I came here to ask. It is a Java Web project that was made to run into a Tomcat ...
0
votes
0answers
72 views

Using Client's Non-exportable Private Key from Windows Cert Store in Mutual SSL Authentication

In SSL, for Client Certificate Authentication, we have to use Windows Certificate Store. So client's certificate and associated private key is stored in windows store by importing PFX file containing ...
4
votes
1answer
153 views

Create memory dump from the windows commandline

I was following this blog post to dump the memory of a windows host. Sadly this method does not work on Windows Server 2012 because the memory drivers that come with mdd aren't signed and this is ...
0
votes
1answer
46 views

In NTFS EFS how is the symmetric key (FEK) generated?

I have some old backups that are encrypted using windows EFS and I no longer have access to the certificate used to encrypt the FEK symmetric key included in the files but I do have the password, user ...
15
votes
2answers
626 views

How much of a problem is it that Windows “hides” some of the trusted root CA certs?

Based on information on this page, Windows actually trusts many more root CA certificates than what are displayed when a user launches certmgr.msc and navigates to Trusted Root Certification ...
-2
votes
1answer
136 views

Check which ports are left open (vulnerable) and accessible in Windows OS from the Internet

Since open ports are a security risk, I would like to know which ports are open to the Internet (outside my network). I wouldn't think of all open ports as security vulnerabilities just the ones ...
27
votes
3answers
2k views

Are .dll files normally found in system32 but now in a user’s AppData folder always suspicious?

I recently had to read over some malware reports and associated logs for a confirmed malware detection and subsequent infection of a Windows asset. The logs clearly show .dll files in a user’s AppData ...
4
votes
2answers
201 views

Why would some Windows executables not have a “Digital Signatures” tab?

Why would some executable on a Windows 7 system not have a "Digital Signatures" tab? (With this question I am referring to those executables that are not part of Windows OS and to which the ...
1
vote
0answers
476 views

wonderlandads.com popup virus [closed]

Problem As for this or this or even this, my computer has been infected to this sh-t and my browsers open an annoying pop-up on every single click to whatever web page I am visiting and this is ...
3
votes
0answers
127 views

Possible Windows 10 Malware [closed]

Data: There are a set of Windows 10 computers. Out of 8 of those computers, three were found to have had the Windows OS altered in an unexpected way. An advanced malware/spyware infection is ...
3
votes
0answers
84 views

Enable FIPS 140.2 in Windows 7 (cng.sys version does not match with versions from NIST Validated list

I am currently working on an application running in Windows 7 Ultimate, and it has to be FIPS 140-2 compliance. As far as I have researched in https://technet.microsoft.com/en-us/library/security/...
6
votes
1answer
349 views

Using Two-Factor Authentication to Stop Pass-the-Hash

Am looking into mitigations to Pass+the-Hash and Pass-the-Ticket in Active Directory that also improve overall network security, too. Have sorting through some of the many two+factor authentication ...
8
votes
2answers
369 views

Can a malware infect just by right clicking?

Someone I know got infected. He sent me the file to analyze. I downloaded the zip and it contained a scr file. I unzipped it and right-clicked to open it in Notepad++. It immediately got quarantined ...
2
votes
0answers
62 views

Is a keytab sufficient for logon?

Is possession of a Kerberos .keytab file (as generated by e.g. ktpass) sufficient to 'pretend to be' that user on a windows machine? For example, create a process as, or access network resources (e.g. ...
3
votes
0answers
40 views

how to create TPM_AUTHDATA as input in tpm commands ?

I'm writing my first program which use tpm (version 1.2) services in Windows 7 using TBS, in this program I'm trying to execute the TPM_CreateWrapKey command. I noticed that many commands like the ...
0
votes
1answer
89 views

EFS encryption in Windows

I'm trying to combine EFS encryption with VeryCrypt, system encryption. With EFS I can choose specific files/folders instead doing a whole drive encryption, so that is the reason I use it. I haven't ...
0
votes
0answers
95 views

Script to emulate DNS for Windows machine in honeyd

I want to simulate virtual Windows hosts using honeyd. To do so I have installed honeyd. I have configured honeyd as Windows XP SP1, and now I want to emulate DNS services on it. I used UDPot as a DNS ...
4
votes
2answers
463 views

What is the correct way to remove bitlocker secrets from a TPM when returning a device for warranty?

Note: This is not a question about how to preserve data on a device that is returned for warranty. Rather, this is a question about how to ensure that the encrypted remnant data on the device is not ...
-1
votes
2answers
89 views

Need tool to detect malware in several pdfs in Windows environment [closed]

I am looking for a Windows product that could detect malware in several pdfs in Windows environment. I don't want to use Python and I don't want to use Stream Dumpler. I am looking for something ...
3
votes
4answers
259 views

Simple tools for searching process memory for MSSQL connection strings

I'm working with a piece of software that handles all permissions in a Windows client binary on the user's computer. The software connects to a backend database using the sa account. The sa password ...
2
votes
2answers
149 views

How can an attacker tell when someone in a private network connects to the Internet? [closed]

I heard that your PC can get infected just by connecting to the Internet (even without the web). Assuming I'm connected to a private home network, how can an attacker tell that I just connected to the ...
0
votes
0answers
1k views

BRCM-LVG in home network

Shortly after the local cable provider upgraded our cable modem an item named BRCM-LVG appeared in the list of devices (two computers) connected to our Windows 7 homegroup. It contains a folder named ...
2
votes
2answers
129 views

I am not connecting to internet, do I still need the windows firewall on?

Forgive my ignorance but I am truly uncertain. Here is my situation: I have dual booted a Linux distro and Windows 7 on my machine. Windows 7 sole purpose is for gaming, that's all. I'm not planning ...
45
votes
3answers
5k views

Can USB drive infect my PC with malware if I don't allow any autorun.inf to run?

Assuming that I'm using a trusted USB flash drive (meaning that it's not some device that looks like a USB drive and whose purpose is to damage my PC), is it possible for my PC to get infected from ...
8
votes
1answer
142 views

How can I protect myself against software installing insecure root certificates?

With the recent news that Dell installed a root certificate with a publicly accessible private key on their notebooks, I'm wondering how I can protect myself against this kind of incompetence. Of ...
5
votes
1answer
117 views

Resetting the Windows RNG

According to this research, Windows seems to produce the same sequence of random numbers indefinitely when a process is kicked off before a VM snapshot is taken. This is a huge issue obviously when ...
0
votes
1answer
158 views

SAM and SYSTEM file copying to another PC

Can I copy a SAM file and a SYSTEM file of a laptop and just change my SAM file and SYSTEM file on my own PC? Will my PC then have the password of the laptop? Or is there another way I can copy the ...
89
votes
2answers
20k views

Can a rogue .wmv file “hijack” Windows Media Player?

I've downloaded a .wmv file using P2P. Attempting to play it with Media Player Classic (K-Lite Codec Pack) only gave me a green square in the playback window: I noticed that the video came with a ...
1
vote
2answers
96 views

Is a Windows (fresh installation) 7 really this safe against NMAP or am I missing something?

I am playing with NMAP in my small private network performing port scanning. So far I went through scanning the following OSs (Unaltered new installations - Meaning no extra software installed!): ...
3
votes
1answer
206 views

Join a computer to the domain or not?

If we have a computer on the network that is only used by one person that logs on using a local account, no noe will log on using a domain account, what are the pros and cons of joining/not joining ...
1
vote
1answer
95 views

Can OnionDuke malware actually spread to new systems through an image?

I do realize that questions about malware in images has been asked before. It just does not look like they answer the questions in this particular situation. This is about the OnionDuke APT malware ...
1
vote
1answer
44 views

Find the Encryption Key (used for network encryption) assuming a Trust Chain is being used on Windows?

If I double click on a .crt file, in Windows, I'm presented with three tabs General, Details, and Certification Path. I'm aware that the Certification Path tells you the details of which root and ...
12
votes
4answers
1k views

When using multiple operating systems, can they affect each other?

Let's say I have two different OS on my PC, Windows 10 and Linux. It is well-known that Windows collects a significant amount of information and sends it to Microsoft's servers, but I wonder if it "...
1
vote
3answers
89 views

Root access and malware

Would it help to defend against malware if I use a less privileged Windows 7 account for my day-to-day work?
3
votes
1answer
85 views

How to recover/log attempted passwords from a failed login [closed]

I saw the following question before: Is it legal to log passwords from failed logins? I think it raises another question: How do I log failed attempted passwords? That seems very useful when I need ...
4
votes
1answer
319 views

Do applications installing into AppData folder make UAC useless?

When UAC was first introduced, most well-behaving applications were installed into Program Files folder, so any tampering with executable files without explicit user consent became impossible. So when ...