Suspicious activity on logging bucket

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	AWS Audit Log
Detection Modules	Cloud
Detector Tags	Cloud Log Tampering Analytics
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Disable or Modify Tools (T1685), Disable or Modify Tools: Disable or Modify Cloud Log (T1685.002)
Severity	Informational

Description

An identity performed a suspicious activity on bucket used to store logs.

Attacker's Goals

Evade detection by tampering the logs.

Investigative actions

• Verify whether the identity attempted to access the bucket.
• Verify no logs were modified in the bucket.

Variations

Suspicious deletion on CloudTrail logging bucket

Synopsis

Field	Value
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Disable or Modify Tools (T1685), Disable or Modify Tools: Disable or Modify Cloud Log (T1685.002)
Severity	Medium

Description

An identity performed a suspicious activity on bucket used to store CloudTrail logs.

Attacker's Goals

Evade detection by tampering the logs.

Investigative actions

• Verify whether the identity attempted to access the bucket.
• Verify no logs were modified in the bucket.

Suspicious deletion on S3 access logs bucket

Synopsis

Field	Value
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Disable or Modify Tools (T1685), Disable or Modify Tools: Disable or Modify Cloud Log (T1685.002)
Severity	Medium

Description

An identity performed a suspicious activity on an S3 bucket used to store access logs.

Attacker's Goals

Evade detection by tampering the logs.

Investigative actions

• Verify whether the identity attempted to access the bucket.
• Verify no logs were modified in the bucket.