Member added to a Windows local security group

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: Windows Event Collector OR XDR Agent with eXtended Threat Hunting (XTH)
Detection Modules	Identity Analytics
ATT&CK Tactic	Persistence (TA0003), Privilege Escalation (TA0004)
ATT&CK Technique	Account Manipulation (T1098), Valid Accounts (T1078)
Severity	Informational

Description

A member was added to a Windows local security group.

Attacker's Goals

Privilege escalation using a valid account.

Investigative actions

• Check the user who added the account to the group and verify its activity.

Variations

User added to the Windows local Administrator group

Synopsis

Field	Value
ATT&CK Tactic	Persistence (TA0003), Privilege Escalation (TA0004)
ATT&CK Technique	Account Manipulation (T1098), Valid Accounts (T1078)
Severity	Low

Description

A member was added to a Windows local security group.

Attacker's Goals

Privilege escalation using a valid account.

Investigative actions

• Check the user who added the account to the group and verify its activity.

Member added to the Windows local Administrator group

Synopsis

Field	Value
ATT&CK Tactic	Persistence (TA0003), Privilege Escalation (TA0004)
ATT&CK Technique	Account Manipulation (T1098), Valid Accounts (T1078)
Severity	Informational

Description

A member was added to a Windows local security group.

Attacker's Goals

Privilege escalation using a valid account.

Investigative actions

• Check the user who added the account to the group and verify its activity.