sigmahighHunting

CobaltStrike Service Installations - Security

Detects known malicious service installs that appear in cases in which a Cobalt Strike beacon elevates privileges or lateral movement

MITRE ATT&CK

T1021.002 T1543.003 T1569.002

persistenceexecutionprivilege-escalationlateral-movement

Detection Query

event_id:
  EventID: 4697
selection1:
  ServiceFileName|contains|all:
    - ADMIN$
    - .exe
selection2:
  ServiceFileName|contains|all:
    - "%COMSPEC%"
    - start
    - powershell
selection3:
  ServiceFileName|contains: powershell -nop -w hidden -encodedcommand
selection4:
  ServiceFileName|base64offset|contains: "IEX (New-Object Net.Webclient).DownloadString('http://127.0.0.1:"
condition: event_id and 1 of selection*

Author

Florian Roth (Nextron Systems), Wojciech Lesicki

Created

2021-05-26

Data Sources

windowssecurity

Platforms

windows

References

Tags

attack.persistenceattack.executionattack.privilege-escalationattack.lateral-movementattack.t1021.002attack.t1543.003attack.t1569.002

Raw Content

title: CobaltStrike Service Installations - Security
id: d7a95147-145f-4678-b85d-d1ff4a3bb3f6
related:
    - id: 5a105d34-05fc-401e-8553-272b45c1522d
      type: derived
status: test
description: Detects known malicious service installs that appear in cases in which a Cobalt Strike beacon elevates privileges or lateral movement
references:
    - https://www.sans.org/webcasts/119395
    - https://www.crowdstrike.com/blog/getting-the-bacon-from-cobalt-strike-beacon/
    - https://thedfirreport.com/2021/08/29/cobalt-strike-a-defenders-guide/
author: Florian Roth (Nextron Systems), Wojciech Lesicki
date: 2021-05-26
modified: 2022-11-27
tags:
    - attack.persistence
    - attack.execution
    - attack.privilege-escalation
    - attack.lateral-movement
    - attack.t1021.002
    - attack.t1543.003
    - attack.t1569.002
logsource:
    product: windows
    service: security
    definition: The 'System Security Extension' audit subcategory need to be enabled to log the EID 4697
detection:
    event_id:
        EventID: 4697
    selection1:
        ServiceFileName|contains|all:
            - 'ADMIN$'
            - '.exe'
    selection2:
        ServiceFileName|contains|all:
            - '%COMSPEC%'
            - 'start'
            - 'powershell'
    selection3:
        ServiceFileName|contains: 'powershell -nop -w hidden -encodedcommand'
    selection4:
        ServiceFileName|base64offset|contains: "IEX (New-Object Net.Webclient).DownloadString('http://127.0.0.1:"
    condition: event_id and 1 of selection*
falsepositives:
    - Unknown
level: high