PH_RULE_OracleOci_PolicyDeleted
Enabled
Oracle OCI Policy Deleted. Policies define access to resources in OCI.
7
Security
Defense Evasion
Defense Evasion consists of techniques that adversaries use to avoid detection throughout their compromise. Techniques used for defense evasion include uninstalling/disabling security software or obfuscating/encrypting data and scripts. Adversaries also leverage and abuse trusted processes to hide and masquerade their malware. Other tactics’ techniques are cross-listed here when those techniques include the added benefit of subverting defenses.
https://attack.mitre.org/tactics/TA0005T1562.007
Impair Defenses: Disable or Modify Cloud Firewall
Adversaries may disable or modify a firewall within a cloud environment to bypass controls that limit access to cloud resources. Cloud firewalls are separate from system firewalls. Modifying or disabling a cloud firewall may enable adversary C2 communications, lateral movement, and/or data exfiltration that would otherwise not be allowed.
https://attack.mitre.org/techniques/T1562/007Network
Oracle OCI via OCI_Streaming_SDK
Correlation
Investigate if the policy was purposefully deleted, following change management procedures.
If the following pattern or patterns match an ingested event within the given time window in seconds, trigger an incident.
120 seconds
If the following defined pattern/s occur within a 120 second time window.
policy_deleted
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 = "Oracle-OCI-identitycontrolplane-deletepolicy"
This defines how matching events are aggregated, only events with the same matching attribute values are grouped into one unique incident ID
user,srcIpAddr,policyName,compartmentName
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
user=policy_deleted.user,
srcIpAddr=policy_deleted.srcIpAddr,
policyName=policy_deleted.policyName,
compartmentName=policy_deleted.compartmentName