AWS ElastiCache Security Group Modified or Deleted

 1title: AWS ElastiCache Security Group Modified or Deleted
 2id: 7c797da2-9cf2-4523-ba64-33b06339f0cc
 3status: test
 4description: Identifies when an ElastiCache security group has been modified or deleted.
 5references:
 6    - https://github.com/elastic/detection-rules/blob/7d5efd68603f42be5e125b5a6a503b2ef3ac0f4e/rules/integrations/aws/impact_elasticache_security_group_modified_or_deleted.toml
 7author: Austin Songer @austinsonger
 8date: 2021-07-24
 9modified: 2022-10-09
10tags:
11    - attack.impact
12    - attack.t1531
13logsource:
14    product: aws
15    service: cloudtrail
16detection:
17    selection:
18        eventSource: elasticache.amazonaws.com
19        eventName:
20            - 'DeleteCacheSecurityGroup'
21            - 'AuthorizeCacheSecurityGroupIngress'
22            - 'RevokeCacheSecurityGroupIngress'
23            - 'AuthorizeCacheSecurityGroupEgress'
24            - 'RevokeCacheSecurityGroupEgress'
25    condition: selection
26falsepositives:
27    - A ElastiCache security group deletion may be done by a system or network administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Security Group deletions from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
28
29
30level: low