Bounty: 50
I found a series of Windows logon events 4624 like this:
An account was successfully logged on.
Subject:
Security ID: SYSTEM
Account Name: mycomputername$
Account Domain: WORKGROUP
Logon ID: 0x3E7
Logon Information:
Logon Type: 5
Restricted Admin Mode: -
Virtual Account: No
Elevated Token: Yes
Impersonation Level: Impersonation
New Logon:
Security ID: SYSTEM
Account Name: SYSTEM
Account Domain: NT AUTHORITY
Logon ID: 0x3E7
Linked Logon ID: 0x0
Network Account Name: -
Network Account Domain: -
Logon GUID: {00000000-0000-0000-0000-000000000000}
Process Information:
Process ID: 0x3cc
Process Name: C:WindowsSystem32services.exe
Network Information:
Workstation Name: -
Source Network Address: -
Source Port: -
Detailed Authentication Information:
Logon Process: Advapi
Authentication Package: Negotiate
Transited Services: -
Package Name (NTLM only): -
Key Length: 0
Each of them is followed by another 4672 event
Special privileges assigned to new logon.
Subject:
Security ID: SYSTEM
Account Name: SYSTEM
Account Domain: NT AUTHORITY
Logon ID: 0x3E7
Privileges: SeAssignPrimaryTokenPrivilege
SeTcbPrivilege
SeSecurityPrivilege
SeTakeOwnershipPrivilege
SeLoadDriverPrivilege
SeBackupPrivilege
SeRestorePrivilege
SeDebugPrivilege
SeAuditPrivilege
SeSystemEnvironmentPrivilege
SeImpersonatePrivilege
SeDelegateSessionUserImpersonatePrivilege
From the looks of this, it seems that certain service or scheduled task is causing these logons. I tried to look into Windows LogsApplication and Windows LogsSystem but found no event that happened at the same time of these logons. I am confused as to how to locate the service or task that is causing these logons. Any suggestions or hints are welcome. Thanks in advance!