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Incoming Attacks? Port 389?


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On my Windows Server 2012 R2 machine, Malware Bytes is picking up incoming attempts from malware, riskware, etc. It happens a few times per day and they are always inbound. The IP addresses differ each time, but they are consistently trying port 389 and lsass.exe. They have also tried port 53 and dns.exe. I have both ports blocked in the firewall on the server and have my router firewall enabled.

This started happening after a thwarted randomware attack with a virus spread from a laptop connecting to the server via VPN. Everything has been thoroughly scrubbed. The drive that had the encrypted files was formatted and the files were restored from a clean cloud backup.

However, I can't for the life of me figure out why I keep seeing these incoming attempts. Is it because this server is now "on the radar" of the attackers, so they just keeping trying automatically?

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  • Root Admin

Hello @t3chr0b0t and :welcome:

Sorry for the delay. Please post back the protection logs showing the block. Then run the following. Note, that if it's only incoming then it is probably normal and if needed can be added to your firewall to block.

 

Please run the following steps and post back the logs as an attachment when ready.

STEP 01

  • If you're already running Malwarebytes 3 then open Malwarebytes and check for updates. Then click on the Scan tab and select Threat Scan and click on Start Scan button.
  • If you don't have Malwarebytes 3 installed yet please download it from here and install it.
  • Once installed then open Malwarebytes and check for updates. Then click on the Scan tab and select Threat Scan and click on Start Scan button.
  • Once the scan is completed click on the Export Summary button and save the file as a Text file to your desktop or other location you can find, and attach that log on your next reply.
  • If Malwarebytes won't run then please skip to the next step and let me know on your next reply.

STEP 02

Please download AdwCleaner by Malwarebytes and save the file to your Desktop.

  • Right-click on the program and select RunAsAdmin.jpg Run as Administrator to start the tool.
  • Accept the Terms of use.
  • Wait until the database is updated.
  • Click Scan.
  • When finished, please click Clean.
  • Your PC should reboot now if any items were found.
  • After reboot, a log file will be opened. Copy its content into your next reply.

 

RESTART THE COMPUTER Before running Step 3

STEP 03
Please download the Farbar Recovery Scan Tool and save it to your desktop.

Note: You need to run the version compatible with your system. You can check here if you're not sure if your computer is 32-bit or 64-bit

  • Double-click to run it. When the tool opens, click Yes to disclaimer.
  • Press the Scan button.
  • It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your reply.
  • The first time the tool is run, it also makes another log (Addition.txt). If you've, run the tool before you need to place a check mark here.
  • Please attach the Additions.txt log to your reply as well.

 

Thanks

Ron

 

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  • 2 weeks later...
  • Root Admin

Due to the lack of feedback, this topic is closed to prevent others from posting here.

If you need this topic reopened, please send a Private Message to any one of the moderating team members. Please include a link to this topic with your request.

This applies only to the originator of this topic. Other members who need assistance please start your own topic in a new thread.

Thanks

 

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