Windows Task Manager User tab

Checked the user tab on task manager and see microsoft in the "User" column and disconnected in the "Status" column. Anyone know what's going on?
Who is Participating?

Improve company productivity with a Business Account.Sign Up

r-kConnect With a Mentor Commented:
Looks like server was hacked. Here is my checklist for times like these:

(1) Examine all user accounts, disable or delete any accounts known to be fraudulent, then change passwords on all admin accounts, using at least 10 chars and avoid common names and words.

(2) Enable lockout policy on failed logins (so that an account is locked out for 10 mins. after e.g. 6 failed attempts). Note: The Administrator account cannot be locked out so make sure that has a tough and long password.

(3) Download RootkitRevealer ( and do a scan. Post the log here if it shows anything suspect. If the log is very long then just post the first 30 lines or so. Be sure to save the log in any case.

(4) Download Autoruns from:
(a) Run the program. It lists a bunch of things that start when Windows starts.
(b) From the menu bar, select Options, and uncheck "Include Empty Locations" and "check" "Hide Microsoft Entries"
    Important -> Then click the Refresh button in the toolbar.
(c) This will give you a shorter, more meaningful list.
(d) Post the log here if anything interesting.

(5) Run "netstat -ab" from a command prompt, save the output to a text file (e.g. "netstat -ab > list.txt") then examine for anything that doesn't belong. If you like you can post the suspect entries here. Replace your ip with xx.xx if needed.

(6) If you identify any files installed by the hacker, search the rest of your C: drive for any other files created/modified around that date and time. Also, rather than deleting files left behind by the hackers, move them to another disk or CD for possible later study.

(7) After things have been cleaned up, download and run MBSA from: and do a scan and follow as many steps as reasonable.

(8) Turn off unnecessary network services.

(9) If you have a firewall, check which ports are open, and why.
Scott AndersonPrincipal Support EngineerCommented:
That tab shows you who is connected to the server via RDP/Terminal Services.  Or in your case: who _was_ connected and has a Terminal Services session in a "Disconnected" state.  Try and right-click on it to see if you can Remote Control the session and see what was going on.
lunamoonfazeAuthor Commented:
Dropped in and found nothing good. Files found on desktop: dm.exe, ku.mmp, firefox setup, smtp.csv and last but certainly not least: gammadyne mailer.
NEW Internet Security Report Now Available!

WatchGuard’s Threat Lab is a group of dedicated threat researchers committed to helping you stay ahead of the bad guys by providing in-depth analysis of the top security threats to your network.  Check out this quarters report on the threats that shook the industry in Q4 2017.

Scott AndersonPrincipal Support EngineerCommented:
Hmmm... Just guessing - you don't have a user in your domain or on the server that's named "Microsoft", do you?  You may want to review user accounts and security on your server - it may have been hacked.  Don't know if you have a structured server security compromise gameplan, but I would consider the server compromised and get it off the network as quickly as possible and start assessing the rest of your network to make sure they haven't done anything to the rest of your servers/clients.  It's most likely they were just interested in getting/building a spambox for their purposes, but you never know...  Good Luck with this...

dm.exe    - Take a google on this, it's a known backdoor trojan
gammadyne mailer - possible whomever it was was trying to drop a mailer program on your server to make it a spam box.
lunamoonfazeAuthor Commented:
This a file server that is in use during regular business hours. My local LAN specialist is scheduled to come out next weekend. I will follow your checklist then. Thanks for the details.
lunamoonfazeAuthor Commented:
RootkitRevealer log:

HKLM\SECURITY\Policy\Secrets\gthrsvc:{505DD11A-F6DE-4559-8EA2-7B27A5457A08}*      11/2/2006 2:07 PM      0 bytes      Key name contains embedded nulls (*)
HKLM\SECURITY\Policy\Secrets\SAC*      10/31/2006 4:00 PM      0 bytes      Key name contains embedded nulls (*)
HKLM\SECURITY\Policy\Secrets\SAI*      10/31/2006 4:00 PM      0 bytes      Key name contains embedded nulls (*)
HKLM\SECURITY\Policy\Secrets\SCM:{148f1a14-53f3-4074-a573-e1ccd344e1d0}*      10/31/2006 3:21 PM      0 bytes      Key name contains embedded nulls (*)
HKLM\SECURITY\Policy\Secrets\SCM:{3D14228D-FBE1-11D0-995D-00C04FD919C1}*      11/2/2006 1:55 PM      0 bytes      Key name contains embedded nulls (*)
HKLM\SOFTWARE\Classes\ActEmailFile\      6/5/2007 5:13 PM      19 bytes      Data mismatch between Windows API and raw hive data.
HKLM\SOFTWARE\Classes\ActEmailFile\DefaultIcon\      6/5/2007 5:13 PM      39 bytes      Data mismatch between Windows API and raw hive data.
HKLM\SOFTWARE\Classes\ActEmailFile\shell\open\      6/5/2007 5:13 PM      21 bytes      Data mismatch between Windows API and raw hive data.
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Reliability\LastAliveUptime      6/28/2008 1:07 PM      4 bytes      Data mismatch between Windows API and raw hive data.
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Reliability\LastAliveStamp      6/28/2008 1:07 PM      16 bytes      Data mismatch between Windows API and raw hive data.
C:\Program Files\Exchsrvr\Mailroot\vsi 1\Queue\NTFS_9ef0d2ac01c8d9520000000d.EML      6/28/2008 1:10 PM      4.39 KB      Hidden from Windows API.
C:\Program Files\Exchsrvr\Mailroot\vsi 1\Queue\NTFS_9ef0d2ac01c8d9520000000d.EML:PROPERTIES      6/28/2008 1:10 PM      2.02 KB      Hidden from Windows API.
C:\Program Files\Exchsrvr\Mailroot\vsi 1\Queue\NTFS_9ef0d2ac01c8d9520000000d.EML:PROPERTIES-LIVE      6/28/2008 1:10 PM      6.02 KB      Hidden from Windows API.

You definitely don't have a rootkit. Anything interesting shown by Autoruns?
lunamoonfazeAuthor Commented:
Thanks again. Your suggestions were exactly what I was looking for to know.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.