Spiceworks alerted me earlier that my computer (that has domain admin credentials) was communicating with a suspicious IP address. I checked the address out and it looked like it was bad, so I unplugged my computer from the network. While my computer was unplugged, I saw in the event log that there were multiple attempts to log into the local admin account with the wrong credentials. Our Symantec Endpoint protection has not uttered a single warning this whole time (not surprising..).
So I nuked it and re-imaged it from scratch. I no longer see the attempts to use the credentials on my local machine, but now I see it on our domain controller. The event log is showing that one of our virtual servers is trying to authenticate with the domain controller and I have this event showing:
An account failed to log on.
Subject:
Security ID: NULL SID
Account Name: -
Account Domain: -
Logon ID: 0x0
Logon Type: 3
Account For Which Logon Failed:
Security ID: NULL SID
Account Name: XXXX (our domain admin login)
Account Domain: XXXX (our virtual server)
Failure Information:
Failure Reason: Unknown user name or bad password.
Status: 0xc000006d
Sub Status: 0xc000006a
Process Information:
Caller Process ID: 0x0
Caller Process Name: -
Network Information:
Workstation Name: XXXXX (our virtual server)
Source Network Address: fe80::a1d4:acb5:87a3:dc62
Source Port: 53743
Detailed Authentication Information:
Logon Process: NtLmSsp
Authentication Package: NTLM
Transited Services: -
Package Name (NTLM only): -
Key Length: 0
This event is generated when a logon request fails. It is generated on the computer where access was attempted.
The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.
The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network).
The Process Information fields indicate which account and process on the system requested the logon.
The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.
The authentication information fields provide detailed information about this specific logon request.
- Transited services indicate which intermediate services have participated in this logon request.
- Package name indicates which sub-protocol was used among the NTLM protocols.
- Key length indicates the length of the generated session key. This will be 0 if no session key was requested.
This is my first IT job and I've only been here a few months. I am working by myself and I'm completely in over my head. Most of my college and internship training never really touched on security so I have no idea what to do. We have backup software, but I really want that to be my last case scenario...