klist purge

- Table of Contents

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- Tool Overview

Category
Deleting Evidence
Description
Deletes saved Kerberos tickets.
Example of Presumed Tool Use During an Attack
This tool is used to delete Kerberos tickets used during an attack from the host.

- Tool Operation Overview

Item Description
OS Windows
Belonging to Domain Required
Rights Standard user

- Information Acquired from Log

Standard Settings
  • Host
    • Execution history (Prefetch)
Additional Settings
  • Host
    • Execution history (audit policy)

- Evidence That Can Be Confirmed When Execution is Successful

- Main Information Recorded at Execution

- Host

Event log

# Log Event ID Task Category Event Details
1 Microsoft-Windows-Sysmon/Operational 1 Process Create (rule: ProcessCreate) Process Create.
  • CommandLine: Command line of the execution command (klist purge)
  • UtcTime: Process execution date and time (UTC)
  • ProcessGuid/ProcessId: Process ID
  • Image: Path to the executable file (C:\Windows\System32\klist.exe)
  • User: Execute as user
2 Security 4689 Process Termination A process has exited.
  • Log Date and Time: Process terminated date and time (local time)
  • Process Information > Exit Status: Process return value (0x0)
  • Subject > Security ID/Account Name/Account Domain: SID/Account name/Domain of the user who executed the tool
  • Process Information > Process Name: Path to the executable file (C:\Windows\System32\klist.exe)

- Details: Host

- Event Log

# Event Log Event ID Task Category Event Details
1 Microsoft-Windows-Sysmon/Operational 1 Process Create (rule: ProcessCreate) Process Create.
  • LogonGuid/LogonId: ID of the logon session
  • ParentProcessGuid/ParentProcessId: Process ID of the parent process
  • ParentImage: Executable file of the parent process
  • CurrentDirectory: Work directory
  • CommandLine: Command line of the execution command (klist purge)
  • IntegrityLevel: Privilege level (Medium)
  • ParentCommandLine: Command line of the parent process
  • UtcTime: Process execution date and time (UTC)
  • ProcessGuid/ProcessId: Process ID
  • User: Execute as user
  • Hashes: Hash value of the executable file
  • Image: Path to the executable file (C:\Windows\System32\klist.exe)
Security 4688 Process Create A new process has been created.
  • Process Information > Required Label: Necessity of privilege escalation
  • Subject > Security ID/Account Name/Account Domain: SID/Account name/Domain of the user who executed the tool
  • Process Information > Source Process Name: Path to parent process that created the new process
  • Log Date and Time: Process execution date and time (local time)
  • Process Information > New Process Name: Path to the executable file (C:\Windows\System32\klist.exe)
  • Process Information > Token Escalation Type: Presence of privilege escalation (1)
  • Process Information > New Process ID: Process ID (hexadecimal)
  • Process Information > Source Process ID: Process ID of the parent process that created the new process. "Creator Process ID" in Windows 7
  • Subject > Logon ID: Session ID of the user who executed the process
2 Microsoft-Windows-Sysmon/Operational 5 Process terminated (rule: ProcessTerminate) Process terminated.
  • UtcTime: Process terminated date and time (UTC)
  • ProcessGuid/ProcessId: Process ID
  • Image: Path to the executable file (C:\Windows\System32\klist.exe)
Security 4689 Process Termination A process has exited.
  • Process Information > Process ID: Process ID (hexadecimal)
  • Subject > Security ID/Account Name/Account Domain: SID/Account name/Domain of the user who executed the tool
  • Process Information > Exit Status: Process return value (0x0)
  • Log Date and Time: Process terminated date and time (local time)
  • Process Information > Process Name: Path to the executable file (C:\Windows\System32\klist.exe)
  • Subject > Logon ID: Session ID of the user who executed the process
3 Security 4656 File System/Other Object Access Events A handle to an object was requested.
  • Process Information > Process ID: Process ID (hexadecimal)
  • Access Request Information > Access/Reason for Access/Access Mask: Requested privilege
  • Subject > Security ID/Account Name/Account Domain: SID/Account name/Domain of the user who executed the tool
  • Object > Object Name: Target file name (C:\Windows\Prefetch\KLIST.EXE-[RANDOM].pf)
  • Process Information > Process Name: Name of the process that closed the handle (C:\Windows\System32\svchost.exe)
  • Object > Object Type: Type of the file (File)
  • Subject > Logon ID: Session ID of the user who executed the process
  • Object > Handle ID: ID of the relevant handle
Security 4663 File System An attempt was made to access an object.
  • Process Information > Process ID: Process ID (hexadecimal)
  • Access Request Information > Access/Reason for Access/Access Mask: Requested privilege
  • Subject > Security ID/Account Name/Account Domain: SID/Account name/Domain of the user who executed the tool
  • Object > Object Name: Target file name (C:\Windows\Prefetch\KLIST.EXE-[RANDOM].pf)
  • Access Request Information > Access: Requested privilege
  • Audit Success: Success or failure (access successful)
  • Process Information > Process Name: Name of the process that closed the handle (C:\Windows\System32\svchost.exe)
  • Object > Object Type: Category of the target (File)
  • Subject > Logon ID: Session ID of the user who executed the process
  • Object > Handle ID: ID of the relevant handle (handle obtained with Event ID 4656)
Security 4658 File System The handle to an object was closed.
  • Process Information > Process ID: Process ID (hexadecimal)
  • Process Information > Process Name: Name of the process that requested the object (C:\Windows\System32\svchost.exe)
  • Subject > Security ID/Account Name/Account Domain: SID/Account name/Domain of the user who executed the tool
  • Subject > Logon ID: Session ID of the user who executed the process
  • Object > Handle ID: ID of the relevant handle (handle obtained with Event ID 4656)

- USN Journal

# File Name Process Attribute
1 KLIST.EXE-[RANDOM].pf FILE_CREATE archive+not_indexed
KLIST.EXE-[RANDOM].pf DATA_EXTEND+FILE_CREATE archive+not_indexed
KLIST.EXE-[RANDOM].pf CLOSE+DATA_EXTEND+FILE_CREATE archive+not_indexed

- MFT

# Path Header Flag Validity
1 [Drive Name]:\Windows\Prefetch\KLIST.EXE-[RANDOM].pf FILE ALLOCATED

- Prefetch

# Prefetch File Process Name Process Path Information That Can Be Confirmed
1 C:\Windows\Prefetch\KLIST.EXE-[RANDOM].pf KLIST.EXE C:\WINDOWS\SYSTEM32\KLIST.EXE Last Run Time (last execution date and time)