Questions tagged [windows-server]
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Windows Event ID 4624 with Anonymous Logon. Is it safe?
In our SIEM, I saw the following event below.
From the image above here is what I'm observing:
Successful login noted via eventid 4624
Username used to login was Anonymous logon as indicated by SID ...
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4
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1
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334
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How to find the process that is running PowerShell commands that appear in Windows Defender
On one of our Windows Datacenter 2016, there's an alert that a trojan is trying to install :
The following PowerShell commands are trying to execute at seemingly random hours of the day (always ...
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125
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How strong is windows firewall on Windows Server 2019?
How strong is Windows Firewall?
I have no knowledge on Botnets or how to use them, so I have no way to test Windows firewall's strength. And I believe it would go against the contract I signed with my ...
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1
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122
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Notepad.exe establishing an outbound TCP over port 1025 from Windows using server to a Teradata server, is this unusual?
We have a situation where a user logged into a Windows Server which primarily runs Tableau established an outbound TCP connection over port 1025 where the destination server is part of a Teradata ...
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WMI filter to consumer binding not working correctly
I'm working on some monitoring software for automatic dynamic malware analysis.
I'm pretty unfamiliar with WMI so I made some test MOFs. Here are the MOFs pulled directly from wbemtest.
Filter:
...
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1
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280
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Cipher Suites settings wrong order?
I'm trying to setup a custom order of TLS cipher suites according to this Microsoft list, on Windows Server 2022 but the outcome is not the one that I was expecting.
After using the powershell to ...
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2
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1
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122
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Remote code execution after a valid SMB (net use) password in Windows?
I am doing a capture-the-flag exercise in a Windows scenario.
It uses Windows 2016 server. I was able to find the password and I can access the files with a:
net use z: \\computer\C$ password /user:...
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600
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The request contains no certificate template information
I am trying to create a CSR from MMC on one of our servers. I have previously submitted a lot of requests without any issues by going to MMC.
Certificate folder > Select "Personal" > ...
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2
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1
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157
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Does only having Microsoft Office installed make you vulnerable to the CVE-2022-30190 RCE or having Windows as your OS is enough?
I was wondering whether you need to have Microsoft Office installed to be vulnerable to CVE-2022-30190 RCE.
As far as I understand, MSDT is the issue here (the attack vector so to say) and as shown ...
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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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6k
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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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103
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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
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253
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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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666
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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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105
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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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4
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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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2
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5k
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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
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2k
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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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70
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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
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880
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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
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0
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162
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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
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204
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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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124
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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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154
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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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201
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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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1
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144
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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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1
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277
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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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142
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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
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2k
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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
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171
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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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0
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171
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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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158
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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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1
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414
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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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2
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898
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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
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282
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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
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457
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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 ...
3
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1
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430
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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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423
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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
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1k
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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
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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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2k
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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
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396
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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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1
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791
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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
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2
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205
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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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1
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350
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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 > ...
64
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2
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12k
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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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1k
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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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335
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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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5
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884
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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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