diff --git a/detections/cloud/gdrive_suspicious_file_sharing.yml b/detections/cloud/gdrive_suspicious_file_sharing.yml deleted file mode 100644 index f769460bd8..0000000000 --- a/detections/cloud/gdrive_suspicious_file_sharing.yml +++ /dev/null @@ -1,53 +0,0 @@ -name: Gdrive suspictious file sharing -id: b842f557-c7b3-4b92-aa34-8243217a6685 -version: 1 -date: '2021-08-19' -author: Rod Soto, Splunk -type: Anomaly -datamodel: -- Endpoint -- Email -- Updates -description: This search can help the detection of compromised accounts or internal users sending malicious documents via GSuite file sharing. -search: 'sourcetype="gsuite:drive:json" parameters.target_user=* name=change_user_access | spath "parameters.owner" | search "parameters.owner"="*" | stats count by src_ip parameters.owner parameters.target_user parameters.doc_type parameters.doc_title | `security_content_ctime(firstTime)`| `security_content_ctime(lastTime)` - | `gdrive_suspicious_file_sharing_filter`' -how_to_implement: To successfully implement this search, you need to be ingesting - logs related to gsuite (gsuite:drive:json) having the file sharing metadata like file type, source owner, destination target user, description, etc. -known_false_positives: This search will also produce normal activity statistics. Fields such as parameters.doc_type and parameters.doc_title may give away -phishing intent. -references: -- https://www.csoonline.com/article/3274546/cybercriminals-impersonate-popular-file-sharing-services-to-take-over-email-accounts.html -tags: - analytic_story: - - DevSecOps - dataset: - - UPDATE_DATASET_URL - kill_chain_phases: - - Exploitation - mitre_attack_id: - - T1566 - product: - - Splunk Enterprise - - Splunk Enterprise Security - - Splunk Cloud - required_fields: - - parameters.target_user - - parameters.owner - security_domain: Cloud - impact: 50 - confidence: 50 - # (impact * confidence)/100 - risk_score: 25 - context: - - Source:Cloud - - Stage:Initial Access - message: N/A - observable: - - name: parameters.owner - type: User - role: - - attacker - - name: parameters.target_user - type: User - role: - - Victim diff --git a/detections/cloud/gsuite_suspicious_calendar_invite.yml b/detections/cloud/gsuite_suspicious_calendar_invite.yml deleted file mode 100644 index e4c06866a4..0000000000 --- a/detections/cloud/gsuite_suspicious_calendar_invite.yml +++ /dev/null @@ -1,56 +0,0 @@ -name: GSuite suspicious calendar invite -id: b842f557-c7b3-4b92-aa34-8243217a6685 -version: 1 -date: '2021-08-19' -author: Rod Soto, Splunk -type: Anomaly -datamodel: -- Endpoint -- Email -- Updates -description: This search can help the detection of compromised accounts or internal users sending suspcious calendar invites via GSuite calendar. These -invites may contain malicious links or attachments. -search: 'sourcetype="gsuite:calendar:json" email=* parameters.event_title!=null | stats count by email ip_address source name parameters.api_kind parameters.event_title parameters.organizer_calendar_id parameters.target_calendar_id parameters.user_agent parameters.event_response_status | convert timeformat="%Y-%m-%dT%H:%M:%S" ctime(firstTime) -| convert timeformat="%Y-%m-%dT%H:%M:%S" ctime(lastTime)| `gsuite_suspicious_calendar_invite_filter`' -how_to_implement: To successfully implement this search, you need to be ingesting - logs related to gsuite (gsuite:drive:json) having the file sharing metadata like file type, source owner, destination target user, description, etc. -known_false_positives: This search will also produce normal activity statistics. Fields such as email, ip address, name, parameters.organizer_calendar_id, parameters.target_calendar_id and parameters.event_title may give away -phishing intent. -references: -- https://www.techrepublic.com/article/how-to-avoid-the-dreaded-google-calendar-malicious-invite-issue/ -tags: - analytic_story: - - DevSecOps - dataset: - - UPDATE_DATASET_URL - kill_chain_phases: - - Exploitation - mitre_attack_id: - - T1566 - product: - - Splunk Enterprise - - Splunk Enterprise Security - - Splunk Cloud - required_fields: - - email - - parameters.organizer_calendar_id - - parameters.target_calendar_id - - parameters.event_title - security_domain: Cloud - impact: 50 - confidence: 50 - # (impact * confidence)/100 - risk_score: 25 - context: - - Source:Cloud - - Stage:Initial Access - message: N/A - observable: - - name: parameters.organizer_calendar_id - type: User - role: - - attacker - - name: parameters.target_calendar_id - type: User - role: - - Victim