PH_Rule_Access_59
Enabled
Detects successful account activity to a recently disabled account
8
Security
Credential Access
Credential Access consists of techniques for stealing credentials like account names and passwords. Techniques used to get credentials include keylogging or credential dumping. Using legitimate credentials can give adversaries access to systems, make them harder to detect, and provide the opportunity to create more accounts to help achieve their goals.
https://attack.mitre.org/tactics/TA0006T1110.001
Brute Force: Password Guessing
Adversaries with no prior knowledge of legitimate credentials within the system or environment may guess passwords to attempt access to accounts.
https://attack.mitre.org/techniques/T1110/001Server
Windows Security Log via OMI or FortiSIEM Agent
Correlation
No remediation guidance specified
If the following pattern or patterns match an ingested event within the given time window in seconds, trigger an incident.
86400 seconds
If the following defined pattern/s occur within a 86400 second time window.
AcctDisabled FOLLOWED_BY SuccessLogin
This defines how two or more distinct events are related in a time-series based action. e.g. An event occurs followed by another event if the source IP, user, and messageId are the same
AcctDisabled.reptDevIpAddr = SuccessLogin.reptDevIpAddr AND AcctDisabled.targetUser = SuccessLogin.user
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 IN ("Win-Security-629","Win-Security-4725")
This defines how matching events are aggregated, only events with the same matching attribute values are grouped into one unique incident ID
reptDevName,reptDevIpAddr,targetUser
This is most typically a numerical constraint that defines when the rule should trigger an incident
COUNT (*) >= 1
Operator Rank: 0 Operator Type: FOLLOWED_BY
This operator defines the logic condition relating to the prior event subpattern clause and the following event subpattern clause
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 IN (Group@PH_SYS_EVENT_HostLogonSuccess, Group@PH_SYS_EVENT_DomainLogonSuccess)
This defines how matching events are aggregated, only events with the same matching attribute values are grouped into one unique incident ID
srcIpAddr,computer,reptDevIpAddr,user
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
destName = AcctDisabled.reptDevName,
destIpAddr = AcctDisabled.reptDevIpAddr,
user = AcctDisabled.targetUser,
srcIpAddr = SuccessLogin.srcIpAddr,
computer=SuccessLogin.computer