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Description

This search provides detection of GCPloit exploitation framework. This framework can be used to escalate privileges and move laterally from compromised high privilege accounts.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel:
  • Last Updated: 2020-10-08
  • Author: Rod Soto, Splunk
  • ID: a1c5a85e-a162-410c-a5d9-99ff639e5a52

ATT&CK

ID Technique Tactic
T1078 Valid Accounts Defense Evasion, Persistence, Privilege Escalation, Initial Access 
`google_gcp_pubsub_message` data.protoPayload.request.function.timeout=539s 
| table src src_user data.resource.labels.project_id data.protoPayload.request.function.serviceAccountEmail data.protoPayload.authorizationInfo{}.permission data.protoPayload.request.location http_user_agent 
| `gcp_detect_gcploit_framework_filter`

Associated Analytic Story

How To Implement

You must install splunk GCP add-on. This search works with gcp:pubsub:message logs

Required field

  • _time
  • data.protoPayload.request.function.timeout
  • src
  • src_user
  • data.resource.labels.project_id
  • data.protoPayload.request.function.serviceAccountEmail
  • data.protoPayload.authorizationInfo{}.permission
  • data.protoPayload.request.location
  • http_user_agent

Kill Chain Phase

  • Lateral Movement

Known False Positives

Payload.request.function.timeout value can possibly be match with other functions or requests however the source user and target request account may indicate an attempt to move laterally accross acounts or projects

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

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