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sigmahighHunting

HackTool - KrbRelay Execution

Detects the use of KrbRelay, a Kerberos relaying tool

MITRE ATT&CK

T1558.003
credential-access

Detection Query

selection_img:
  - Image|endswith: \KrbRelay.exe
  - OriginalFileName: KrbRelay.exe
selection_cli_1:
  CommandLine|contains|all:
    - " -spn "
    - " -clsid "
    - " -rbcd "
selection_cli_2:
  CommandLine|contains|all:
    - shadowcred
    - clsid
    - spn
selection_cli_3:
  CommandLine|contains|all:
    - "spn "
    - "session "
    - "clsid "
condition: 1 of selection_*

Author

Florian Roth (Nextron Systems)

Created

2022-04-27

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.credential-accessattack.t1558.003
Raw Content
title: HackTool - KrbRelay Execution
id: e96253b8-6b3b-4f90-9e59-3b24b99cf9b4
status: test
description: Detects the use of KrbRelay, a Kerberos relaying tool
references:
    - https://github.com/cube0x0/KrbRelay
author: Florian Roth (Nextron Systems)
date: 2022-04-27
modified: 2023-02-04
tags:
    - attack.credential-access
    - attack.t1558.003
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\KrbRelay.exe'
        - OriginalFileName: 'KrbRelay.exe' # In case the file has been renamed after compilation
    selection_cli_1:
        CommandLine|contains|all:
            - ' -spn '
            - ' -clsid '
            - ' -rbcd '
    selection_cli_2:
        CommandLine|contains|all:
            - 'shadowcred'
            - 'clsid'
            - 'spn'
    selection_cli_3:
        CommandLine|contains|all:
            - 'spn '
            - 'session '
            - 'clsid '
    condition: 1 of selection_*
falsepositives:
    - Unlikely
level: high