sigmamediumTTP

User Added to Local Administrator Group

Detects the addition of a new member to the local administrator group, which could be legitimate activity or a sign of privilege escalation activity

MITRE ATT&CK

T1078 T1098

initial-accessdefense-evasionprivilege-escalationpersistence

Detection Query

selection_eid:
  EventID: 4732
selection_group:
  - TargetUserName|startswith: Administr
  - TargetSid: S-1-5-32-544
filter_main_computer_accounts:
  SubjectUserName|endswith: $
condition: all of selection_* and not 1 of filter_*

Author

Florian Roth (Nextron Systems)

Created

2017-03-14

Data Sources

windowssecurity

Platforms

windows

References

Tags

attack.initial-accessattack.defense-evasionattack.privilege-escalationattack.t1078attack.persistenceattack.t1098

Raw Content

title: User Added to Local Administrator Group
id: c265cf08-3f99-46c1-8d59-328247057d57
status: stable
description: Detects the addition of a new member to the local administrator group, which could be legitimate activity or a sign of privilege escalation activity
references:
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-4732
    - https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/understand-security-identifiers
author: Florian Roth (Nextron Systems)
date: 2017-03-14
modified: 2021-01-17
tags:
    - attack.initial-access
    - attack.defense-evasion
    - attack.privilege-escalation
    - attack.t1078
    - attack.persistence
    - attack.t1098
logsource:
    product: windows
    service: security
detection:
    selection_eid:
        EventID: 4732
    selection_group:
        - TargetUserName|startswith: 'Administr'
        - TargetSid: 'S-1-5-32-544'
    filter_main_computer_accounts:
        SubjectUserName|endswith: '$'
    condition: all of selection_* and not 1 of filter_*
falsepositives:
    - Legitimate administrative activity
level: medium