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Questions tagged [windows-server]

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5 views

CA issued certificates maps to the wrong user in AD

I'm doing certificate-based authentication using windows server 2012. I've set up the CA, NDES and now, when I request a certificate using the SCEP Challenge password, I'm able to receive the ...
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0answers
11 views

How to audit what are the anonymous binds made from my server? [migrated]

After an audit, I am trying to identify the applications generating anonymous binds on the Domain Controllers before the remediation happens. So far, we only have the DCs logs, and that doesn't ...
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0answers
72 views

What are the security implications to clients from a rogue Windows KMS server?

Consider a Windows KMS server is controlled by a rogue actor. What are the capabilities of the Windows KMS system, beyond activation and licensing? Are there any security implications to the client ...
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0answers
44 views

What is possible with a non-administrative users Ticket Granting Ticket and/or NTLM hash?

During a penetration test, if a users NTLM hash or a valid Kerberos TGT is compromised, what attacks are possible if the user is not an administrator on any (in scope) workstations? For instance, it ...
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1answer
63 views

Steps to Harden Ancient Gaming Server

I am somewhat administering an old Windows Server 2008 server that is used to host a older Video Game. It's in such a state that it has tons of custom code on it that run the server and hasn't really ...
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1answer
121 views

519 tls handshake attempts in 3 seconds, with 415 within one second, was this a DDOS attack?

This morning our webserver was unresponsive to say the least. The connection was lost, the database connection we have was sluggish to say the least. I was forced to do a reboot via the remote hosting ...
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1answer
146 views

Windows Server: Import HSM-backed certificate into second server

Scenario: Using Amazon CloudHSM with CloudHSM Windows Client installed and configured. Created CSR for a Code Signing certificate with certreq.exe and provider Cavium Key Storage Provider. Submitted ...
0
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1answer
36 views

How do I need to secure my Windows Shares?

I am working on an Domain Controller / File Server on Windows Server 2012. Lets say that I am from a school and that I have 3 OU's (or security groups) Students Staff IT When I create a shared ...
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1answer
52 views

Deny access to IIS Server from IP local range

I have a local IIS 10 Server, this server runs a critical application. I want to deny access for this server from IP local network and allow only 2 or 3 IP-addresses. Additionally I want to log any ...
2
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0answers
49 views

Active Directory Server and Mimikatz

Is it possible to use mimikatz to dump plaintext passwords of users in network by injecting mimilsa into lsass in Active Directory server? Basically other than dumping SAM which contains all hashes of ...
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0answers
15 views

Why Does Windows Server Block ICMP By Default? [duplicate]

I am conducting a OpenVAS vulnerability scan on a Windows Server 2012 box and it came back empty. It turns out that the scanner checks to see if the host is alive by sending it a ping request--if it ...
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0answers
141 views

Failed to exploit netapi vulnerability on Windows server 2003 R2

I am trying to exploit the ms08_0067_netapi vulnerability on windows server 2003 R2 but the exploitation end with the following message: Exploit completed, but no session was created. Any thoughts? ...
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1answer
63 views

Relying on internal DNS server (Domain Controller) on a DMZ Server

A couple of questions regarding DNS traffic between TRUST and DMZ and best practices. Are there any significant risks in relying on internal DNS from a web server hosted in a DMZ zone? Has the DNS ...
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1answer
40 views

window operating system vulnerability scanner tool [closed]

I want to use window operating system vulnerability scanner tool, just like lynis tools which scans on local os i.e like misconfiguration, os version, like firewall and AV configured. please recommend ...
0
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1answer
388 views

SRUM (system resource usage monitor) forensics - Windows server?

Having read a couple of articles on the SRUM DB and its use in forensics, I started digging around in Server 2016. The path referenced in the articles is not found in Sever 2016 %systemroot%\System32\...
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1answer
293 views

System Infected: Trojan.Naid Activity [closed]

We have Tomcat 6 in the production server with Symantec Endpoint Protection on windows server 2008 server datacenter. Symantec showing following lines in logs [SID: 27068] System Infected: Trojan....
3
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0answers
174 views

How can Nmap bypass Windows Server firewall rules?

I need to block all communication (inbound/outbound) from server A to server B (all ports/all protocols). Server A should communicate with every machine except server B. I can't place firewall rules ...
3
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2answers
108 views

RDP violation without credentials

On a Windows Server 2003 machine seems like someone has logged in through RDP without using credentials: there is a logged access, but there are nor userid nor password. I am wondering how is this ...
0
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1answer
106 views

How to set up a two-tier CA hierarchy in Windows 2012R2 certificate authority?

My apologies if the answer is everywhere but I can't seem to find what I'm looking for. My goal is to sign the CSR with an intermediate ca then root ca. So it looks like this. Server_cert > ...
63
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2answers
11k views

Does removing a GUI from a server make it less vulnerable?

Lately, I was watching an online video about Microsoft Certified Solutions Associate (MCSA) and in one of the videos it says "removing GUI from Windows server makes it less vulnerable." Is that true? ...
3
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0answers
266 views

Exploiting Environment Variables in Scheduled Tasks for UAC Bypass

I am trying to escalate privileges from an ISS user on Windows Server 2012 R2 by exploiting Environment Variables in Scheduled Tasks for UAC Bypass as the following link explains the exploit: https://...
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0answers
86 views

Why can't I see my shellcode executing in Immunity Debugger?

I am doing an exercise on creating custom shellcode (windows). The goal is to create shellcode that will delete the firewall log file. I successfully spawned a reverse shell with metasploit, using a ...
2
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5answers
342 views

What tools are available to compare a 'before' and 'after' security baseline of a Windows machine?

A vendor deals in software that provides secure-messaging software to medical practices, which integrates with popular clinical systems. To install it, they're requesting an hour of unattended remote ...
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8answers
5k views

Is local admin access a danger to a properly set-up network?

I read this question: Is it common to allow local admin access for developers in organizations? This question makes me wonder. I can see how local admin access is a danger to the machine. But can a ...
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0answers
29 views

Fully patched Windows 2008 immediate BSOD from low privilege account

Is there any exploit/script/vulnerability where a very low privileged user can trigger a BSOD or reboot? I'm familiar with the USB exploit, but I'm wondering if its possible with some remote method? ...
118
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19answers
31k views

Is it common to allow local desktop admin access and rights for developers in organizations?

I work at a company with a staff of about 1000+. We currently have programming development staff that work on web based projects (approx 50 people). Recently due to security concerns our IT and ...
0
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1answer
72 views

Is it safe to install MS17-010 unpatched OS as guest on patched host?

For example, these are unpatched old OS. Windows 98 Windows 98 SE Windows ME Windows NT 4.0 Windows 2000 Given that SMBv1 is not disabled on host but already patched. Is the unpatched guest OS ...
2
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0answers
59 views

Will installing WinZip 22 on a server create a security vulnerability?

I've recently requested a WinZip v22 with command line installation on a Windows POC/Dev server that we're using to pilot an application that is written in .Net. In the application there is ...
0
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0answers
36 views

Is it safe to remove read-only attribute from wwwroot?

I have recently moved to a windows 2012 R2 serevr. I have problem for deleting files through HTTP even though I have granted modify,write and read permissions to IIS_ISURS. I noticed that inetpub/...
0
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0answers
29 views

Security of unlocked, all Protocol/Port disabled, Windows AWS server

I have a AWS hosted EC2 Windows 2016 Server instance. I need to run some GUI automation (even when user is not connected via RDP) on it. This is what I do : Enabled RDP|TCP Incoming/Outgoing from my ...
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0answers
26 views

Are the interactive methods of credential gathering listed here actually secure, since they dont store the credentials on disk?

I found an article about different ways to collect and pass credentials in powershell. The author states that some of these methods are 100% secure (which is obviously an exaderation) but for ...
0
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1answer
134 views

Windows Server more vulnerable for password extraction during shutdown?

Is a Windows Server (e.g. Windows Server 2008) more vulnerable during the shutdown process compared to the Server is up and running? Does the process of shutting down Windows introduce additional ...
1
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1answer
75 views

Third party exchange authentication

My organization has an in-house user authentication system shared between a very large number of internal systems. One of these systems needs to retrieve information from the logged in user's ...
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0answers
42 views

Accessing SNTP MD5 Authorized Time Sync Server through GPO

I am running a Windows Server 2008 R2 server network connected to a Hardware Time Sync Server with MD5 authentication enabled. All the servers and clients are configured through NTP as NTP clients to ...
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0answers
422 views

Windows server configured for TLS 1.1 and 1.2 but scans as 1.2 only

I've got a Windows 2008 R2 server with both TLS 1.1 and TLS 1.2 enabled (but TLS 1.0 disabled) in the registry. In other words, Enabled = 0xffffffff and DisabledByDefault = 0 under both the Client and ...
3
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1answer
318 views

What is the main risk of allowing services to logon as NT AUTHORITY\SYSTEM?

Many enterprises run service on production servers as SYSTEM without considering the risk that might arise from this configuration, what is the biggest risk associated with it? and how would attackers ...
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0answers
153 views

Auditing specific SAM_USER events in Windows 2012 R2 Active Directory

I'm trying to create logs in Windows Event Viewer for when a user uses "net user /domain [USER]". So far what I've done was enable the Audit SAM event in Local Group Policy, and it appears to work. ...
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2answers
3k views

How can I track executed PowerShell commands within a network?

I wanto to track PowerShell commands which are executed by users in the intranet. How can I do this? I need the user's information and their executed commands. Is it possible? Edit 1: I guess I can ...
2
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1answer
3k views

Multiple 4625 audit failures on WS2012 R2

On our WS2012 R2, I see multiple 4625 logon audit failures. Anything between once every 5 minutes to 5 times a minute. The usernames that fail the logon attempt change frequently. But seem to be from ...
0
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1answer
465 views

pass the hash via psexec from windows server 2012 ( DC ) to client

I am trying to do some pentest training on my local labs. I created a lab has 3 Windows 2012 r2 servers and 2 Windows 7 + 8 PCS. All machines protected via passwords. I added both to the domain ...
2
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2answers
446 views

How safe is it for the client to open a Remote App?

I have set up Google Chrome as a Remote Application on a Windows Server 2008 R2 machine. I can then load the application on another (Windows 10) machine outside the LAN and browse as if I was doing it ...
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1answer
33 views

Secure access to pre authorized individuals only on application server [closed]

I am building a PHP application and would like to lock the backend (even login page) to only be accessible to preauthorized people - even further be able to link activities to the authorized ...
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0answers
1k views

SSL/TLS cipher suites order for Windows 2016 hosted https sites

We are SaaS & IaaS provider that predominantly use Windows 2012 (R2) for hosting. We have started evaluating Windows 2016 OS and noticed our sites are no longer accessible via Chrome / Firefox (...
0
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1answer
2k views

What is the proper server-side mitigation for the Lucky13 vulnerability (CVE-2013-0169) on a Windows server?

The testssl.sh tool stated that a server I tested is vulnerable to the Lucky13 (CVE-2013-0169) vulnerability. Below the testssl.sh output: ########################################################### ...
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0answers
80 views

Windows EFS Files Spontaneously Unavailable

We are trying to secure a folder with over 1 million very small text files using Windows EFS on Windows Server 2008 R2. We already have an infrastructure in place for backing up keys and data. We ...
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0answers
74 views

DGA scheme on local network [closed]

Reviewing DNS logs within my company I've found a lot of weird DNS requests from a machine involving what it seems a DGA scheme as shown below (real IP has been obfuscated): 04/07/2017 13:36:47 12C8 ...
1
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1answer
708 views

Is an updated OS, in general, more secure than its predecessor?

I'm updating the OS on several servers before they run out of support. I'd like to say the new OS (Windows Server 2008 R2 to Windows Server 2016) is more secure because it includes all security ...
0
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1answer
84 views

Security considerations when opening port for a service?

I would like to host a service (written in C#) on my server and allow it to be accessed from outside the network. I know that I need to open a port in the firewall for this to work, and I managed to ...
1
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1answer
412 views

How can we beef the security of our Windows Server 2012 R2 against ransomware? [duplicate]

We have a MS Windows Server 2012 installed. After the attacks of last week, I was wondering how we could improve the security of the server against ransomware/cryptoware. We did install the latest ...
5
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1answer
70 views

DSquery leaking personal infomation

Today I found DSquery on one of my smb shares at work. I ran it to query users and since my company uses IC numbers as the unique CN, I got to see all my colleagues' ICs. Firstly, is this considered ...