PH_Rule_UserAcct_5
Enabled
Detects Windows user account enabled on a server
7
Change
Persistence
Persistence consists of techniques that adversaries use to keep access to systems across restarts, changed credentials, and other interruptions that could cut off their access. Techniques used for persistence include any access, action, or configuration changes that let them maintain their foothold on systems, such as replacing or hijacking legitimate code or adding startup code.
https://attack.mitre.org/tactics/TA0003T1098.001
Account Manipulation: Additional Cloud Credentials
Adversaries may add adversary-controlled credentials for Azure Service Principals in addition to existing legitimate credentials to maintain persistent access to victim Azure accounts. Azure Service Principals support both password and certificate credentials. With sufficient permissions, there are a variety of ways to add credentials including the Azure Portal, Azure command line interface, and Azure powershell.
https://attack.mitre.org/techniques/T1098/001Server
Windows Security Log via OMI or FortiSIEM Agent
Correlation
Make sure it is an authorized change
If the following pattern or patterns match an ingested event within the given time window in seconds, trigger an incident.
300 seconds
If the following defined pattern/s occur within a 300 second time window.
UserFilter
This is the named definition of the event query, this is important if multiple subpatterns are defined to distinguish them.
This is the query logic that matches incoming events
eventType = "Win-Security-4722"
This defines how matching events are aggregated, only events with the same matching attribute values are grouped into one unique incident ID
reptDevName,user,targetUser,domain
This is most typically a numerical constraint that defines when the rule should trigger an incident
COUNT(*) >= 1
This section defines which fields in matching raw events should be mapped to the incident attributes in the resulting incident.
The available raw event attributes to map are limited to the group by attributes and the aggregate event constraint fields for each subpattern
hostName = UserFilter.reptDevName,
user = UserFilter.user,
targetUser = UserFilter.targetUser,
domain = UserFilter.domain