Oracle OCI: User SMTP Credentials Created

Rule ID

PH_RULE_OracleOci_UserSMTPCredCreated

Default Status

Enabled

Description

Oracle OCI User SMTP Credential was created. Admin users can create keys, tokens, and credentials for other users, and some users are allowed to create these themselves. So the user and target user id may not always refer to the same account.

Severity

MITRE ATT&CK® Tactics

Resource Development

Resource Development consists of techniques that involve adversaries creating, purchasing, or compromising/stealing resources that can be used to support targeting. Such resources include infrastructure, accounts, or capabilities. These resources can be leveraged by the adversary to aid in other phases of the adversary lifecycle, such as using purchased domains to support Command and Control, email accounts for phishing as a part of Initial Access, or stealing code signing certificates to help with Defense Evasion.

https://attack.mitre.org/tactics/TA0042

MITRE ATT&CK® Techniques

T1585.002

Establish Accounts: Email Accounts

Before compromising a victim, adversaries may create email accounts that can be used during targeting. Adversaries can use accounts created with email providers to further their operations, such as leveraging them to conduct Phishing for Information or Phishing. Adversaries may also take steps to cultivate a persona around the email account, such as through use of Social Media Accounts, to increase the chance of success of follow-on behaviors. Created email accounts can also be used in the acquisition of infrastructure. To decrease the chance of physically tying back operations to themselves, adversaries may make use of disposable email services.

https://attack.mitre.org/techniques/T1585/002

Impacts

Network

Data Source

Oracle OCI via OCI_Streaming_SDK

Detection

Correlation

Remediation Guidance

Confirm that the user intentionally created an SMTP credential for the given user account

Time Window

If the following pattern or patterns match an ingested event within the given time window in seconds, trigger an incident.

120 seconds

Trigger Conditions

If the following defined pattern/s occur within a 120 second time window.

smtp_cred_create

SubPattern Definitions

SubPattern Name: smtp_cred_create

This is the named definition of the event query, this is important if multiple subpatterns are defined to distinguish them.

SubPattern Query

This is the query logic that matches incoming events

eventType = "Oracle-OCI-identitycontrolplane-createsmtpcredential"

Group by Attributes

This defines how matching events are aggregated, only events with the same matching attribute values are grouped into one unique incident ID

srcIpAddr,user,targetUserId

Aggregate Constraint

This is most typically a numerical constraint that defines when the rule should trigger an incident

COUNT(*) >= 1

Incident Attribute Mapping

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

 user=smtp_cred_create.user,
targetUserId=smtp_cred_create.targetUserId,
srcIpAddr=smtp_cred_create.srcIpAddr

FortiSIEM Rules