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Questions tagged [windows-server]

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TGS Ticket in Kerberoasting

In kerberoasting , User request service ticket for any service with registered SPN then use the ticket to crack service password. But in kerberoses authentication process , KRB_TGS_REQ request is ...
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369 views

security certificate does not specify Subject Alternative Names

We have a Windows Server 2016 that we use as a web server hosted on premise and we host numerous web applications under the Default Web Site in IIS. All applications are reached by using the server ...
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How could we fix Microsoft LDAP Enforce Channel Binding CVE-2017-8563?

I had a DC server running Microsoft Windows Server 2008 R2 x64. After a vulnerability scan launched on this server using Nexpose, the CVE-2017-8563 was reported by the vulnerability scanner with the ...
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Exposing ADCS OCSP on the Public Internet

I am building a Certificate Authority using Windows Server ADCS as a 'Standalone' CA but my application would be greatly improved if I can utilise OCSP. Is the ADCS Online Responder Role Service ...
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1 answer
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How do I get my server HSM working while connected via RDP? (Win 2019)

The error I get from pkcs11-tool.exe is "No slots." My server has a hardware security module (Nitrokey HSM 2) that becomes inaccessible once I connect to my server via Windows Remote Desktop....
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SVCHOST Executed without any arguements

Our SIEM has a Sigma rule that alerts when svchost is launched without any arguments. The logs are from a domain controller which unfortunately I don't have access to to verify. I will be reaching ...
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Methodology to find exploit for Windows Servers

I am following the following walk-through for a box called Sheild on Hack the Box (HTB). https://www.aldeid.com/wiki/HackTheBox-StartingPoint-Shield For privilege escalation, the walkthrough says &...
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Windows X.509 certificate private keys lost

Have the same certificates installed on several machines, but this happens on only one of them. The certificates are self-signed certificates. The certificates are used for WCF message security. ...
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2 answers
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Windows Server 2019: Add CHACHA20-POLY1305 ciphersuites for IIS

Is there a way to add/enable ECDHE-ECDSA-CHACHA20-POLY1305 and ECDHE-RSA-CHACHA20-POLY1305 ciphersuites on Windows Server 2019 (Build 1809 or later) for HTTPS configuration of IIS webserver? According ...
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RDP Authentication with domain credentials

There's something I don't get with RDP in a domain. During an authentication, if we're using a local account of the distant machine, then the creds are in the SAM so all good. But with a domain ...
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2 answers
738 views

Can connecting to a remote Windows Server infect via RDP infect my home pc?

I am connecting from my home pc to Windows Server via RDP. Theoretically speaking, if the remote server is compromised, can it somehow automatically infect my home pc? No file transfers, only ...
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Server to Server - secured connection from separate domains

I have a box with 2019 Windows Datacenter in one domain, and I have Windows Datacenter 2019 in a completely different domain - I am looking for the best way to connect the two and keep the data secure....
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2 answers
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Nmap with snmp-brute script freezes at 33.33%

I'm currently undergoing a penetration testing course where I discover the basics and I have a task where I need to perform SNMP enumeration on a target. My working environment is as follows : Host : ...
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2 votes
0 answers
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How to mirror user access between Windows 2016 Servers

I'm setting up an intranet web server that will handle requests coming from multiple different types of employees. One of the requests that my server will need to handle is to query data from a ...
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1 answer
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Auditing Sysmon 10 DNS events on Windows 2008 R2

I have installed Sysmon 10 on a Windows 2008 R2 box in the hope of, amongst other things, capturing DNS requests. Sysmon appears to be capturing all other Event ID's except for 22. I have installed ...
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Abusing RDP/SSH post exploitation [closed]

I'm curious to how an attacker would enable RDP/SSH and use it to gain further access to the compromised windows server after achieving remote command/code execution on the server. (Using cmd.exe)
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Connect 3rd party devices to windows server domain

I'm working on radius authentication. Server for this moment and production is windows server 2016. The authenticator is a hp ProCurve 2610-pwr 24p supplicants is a windows pc running windows 10 1903 ...
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Block access from an IP that tries too many requests to Apache server XAMPP / Windows [duplicate]

I have a VPS server with Windows 2016 Server and use XAMPP as Apache Server. Yesterday I receied too many requests from 1-2 IPs. How can I detect how many requests I get per 10 seconds and block them?
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4 votes
1 answer
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Is it possible to take over a Windows server through Oracle?

I have a Windows Server 2008 R2 with an Oracle database running on it. Someone who knows my Oracle username and password claims that he can create a Windows system account somehow. And then he can ...
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215 views

Blocking mimikatz on the OS level?

I want to know under which case would Mimikatz still run despite disabling WDigest? Whether wdigest is set to 1 or 0, mimikatz still worked. (tested on Windows 7, 8, 2012) Is there a better way to ...
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Remote Desktop compromised

So roughly 2 weeks ago my Remote Desktop was compromised whilst I was actively interacting with my server via Rdp I was prompted with a disconnect status equal to “ Another user has connected to ...
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1 vote
1 answer
1k views

Windows RDP logging into itself?

There is a computer system that has to have RDP on an open port(I fought against this of course). I secured this via RDPGuard which worked phenomenally. Anyway, after a few weeks I check back on those ...
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1 answer
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Failed logins on a windows server - performance impact?

I have recently started analysing our logs and noticed 600-700 failed login attempts per day against a windows 2016 server hosting some shared files. I know what the cause is (another misconfigured ...
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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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1 vote
1 answer
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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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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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697 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 ...
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1 answer
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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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1 vote
1 answer
238 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 ...
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3 votes
1 answer
344 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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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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1 answer
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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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-1 votes
1 answer
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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 ...
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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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-1 votes
1 answer
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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....
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6 votes
1 answer
630 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 ...
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3 votes
2 answers
185 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 ...
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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 > ...
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63 votes
2 answers
12k 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? ...
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3 votes
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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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1 vote
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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 ...
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2 votes
5 answers
752 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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22 votes
8 answers
8k 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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132 votes
19 answers
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Is it common to allow local desktop and/or active directory 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 ...
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1 answer
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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 ...
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2 votes
1 answer
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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 ...
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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/...
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1 vote
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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 ...
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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 ...
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1 vote
1 answer
165 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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