Merge branch 'develop' into analytics_enhancement

Author: patel-bhavin

detections/cloud/o365_sharepoint_suspicious_search_behavior.yml

@@ -0,0 +1,67 @@
+name: O365 SharePoint Suspicious Search Behavior
+id: 6ca919db-52f3-4c95-a4e9-7b189e8a043d
+version: 1
+date: '2025-01-08'
+author: Steven Dick
+status: production
+type: Anomaly
+description: The following analytic identifies when the O365 SharePoint users search for suspicious keywords or have an excessive number of queries within a limited timeframe. This behavior may indicate malicious actor enumeration of SharePoint based data within O365.
+data_source: 
+- Office 365 Universal Audit Log
+search: |-
+  `o365_management_activity` Workload=SharePoint Operation="SearchQueryPerformed" SearchQueryText=* EventData=*search*
+  | where NOT (match(SearchQueryText, "\*") OR match(SearchQueryText,"(\*)"))
+  | eval signature_id = CorrelationId, signature=Operation, src = ClientIP, user = UserId, object_name=EventData, command = SearchQueryText, -time = _time 
+  | bin _time span=1hr
+  | stats values(object_name) as object_name values(command) as command, values(src) as src, dc(command) as count, min(-time) as firstTime, max(-time) as lastTime by user,signature,_time
+  | where count > 20 OR match(command, "(?i)password|credential|passwd|shadow|active directory|account|username|network|computer|access|MFA|bank|deposit|payroll|EFT|Electonic Funds|routing")
+  | `security_content_ctime(firstTime)` 
+  | `security_content_ctime(lastTime)`
+  | `o365_sharepoint_suspicious_search_behavior_filter`
+how_to_implement: You must install the Splunk Microsoft Office 365 Add-on and ingest Office 365 management activity events. The thresholds and match terms set within the analytic are initial guidelines and should be customized based on the organization's user behavior and risk profile. Security teams are encouraged to adjust these thresholds to optimize the balance between detecting genuine threats and minimizing false positives, ensuring the detection is tailored to their specific environment.
+known_false_positives: Users searching excessively or possible false positives related to matching conditions.
+references:
+- https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-320a
+- https://attack.mitre.org/techniques/T1213/002/
+drilldown_searches:
+- name: View the detection results for - "$user$"
+  search: '%original_detection_search% | search user = "$user$"'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
+- name: View risk events for the last 7 days for - "$user$"
+  search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$") starthoursago=168  | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
+- name: Investigate search behavior by $user$ 
+  search: '`o365_management_activity` Workload=SharePoint Operation="SearchQueryPerformed" SearchQueryText=* EventData=*search* AND UserId = "$user$"'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
+rba:
+  message: The SharePoint Online was searched suspiciously by $user$
+  risk_objects:
+  - field: user
+    type: user
+    score: 25
+  threat_objects:
+  - field: src
+    type: ip_address
+tags:
+  analytic_story: 
+  - Azure Active Directory Persistence
+  - Office 365 Account Takeover
+  - CISA AA22-320A
+  asset_type: O365 Tenant
+  mitre_attack_id: 
+  - T1213.002 
+  - T1552
+  product: 
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  security_domain: threat
+tests:
+- name: True Positive Test
+  attack_data:
+  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1213.002/o365_sus_sharepoint_search/o365_sus_sharepoint_search.log
+    source: o365
+    sourcetype: o365:management:activity

detections/endpoint/detect_remote_access_software_usage_file.yml

@@ -1,6 +1,6 @@
 name: Detect Remote Access Software Usage File
 id: 3bf5541a-6a45-4fdc-b01d-59b899fff961
-version: 5
+version: 6
 date: '2024-11-13'
 author: Steven Dick
 status: production
@@ -54,6 +54,10 @@ drilldown_searches:
     by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
   earliest_offset: $info_min_time$
   latest_offset: $info_max_time$
+- name: Investigate files on $dest$ 
+  search: '| from datamodel:Endpoint.Filesystem | search dest=$dest$ file_name=$file_name$'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
 rba:
   message: A file for known a remote access software [$file_name$] was created on
     $dest$ by $user$.
@@ -67,13 +71,16 @@ rba:
   threat_objects:
   - field: file_name
     type: file_name
+  - field: signature
+    type: signature
 tags:
   analytic_story:
   - Insider Threat
   - Command And Control
   - Ransomware
   - Gozi Malware
   - CISA AA24-241A
+  - Remote Monitoring and Management Software
   asset_type: Endpoint
   mitre_attack_id:
   - T1219

detections/endpoint/detect_remote_access_software_usage_fileinfo.yml

@@ -1,6 +1,6 @@
 name: Detect Remote Access Software Usage FileInfo
 id: ccad96d7-a48c-4f13-8b9c-9f6a31cba454
-version: 5
+version: 6
 date: '2024-11-13'
 author: Steven Dick
 status: production
@@ -47,22 +47,32 @@ drilldown_searches:
     | `security_content_ctime(lastTime)`'
   earliest_offset: $info_min_time$
   latest_offset: $info_max_time$
+- name: Investigate processes on $dest$ 
+  search: '| from datamodel:Endpoint.Processes| search dest=$dest$ process_name=$process_name$'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
 rba:
   message: A file attributes for known a remote access software [$process_name$] was
     detected on $dest$
   risk_objects:
   - field: dest
     type: system
     score: 25
+  - field: user
+    type: user
+    score: 25    
   threat_objects:
   - field: process_name
     type: process_name
+  - field: signature
+    type: signature
 tags:
   analytic_story:
   - Insider Threat
   - Command And Control
   - Ransomware
   - Gozi Malware
+  - Remote Monitoring and Management Software
   asset_type: Endpoint
   mitre_attack_id:
   - T1219

detections/endpoint/detect_remote_access_software_usage_process.yml

@@ -1,6 +1,6 @@
 name: Detect Remote Access Software Usage Process
 id: ffd5e001-2e34-48f4-97a2-26dc4bb08178
-version: 5
+version: 6
 date: '2024-11-13'
 author: Steven Dick
 status: production
@@ -59,6 +59,10 @@ drilldown_searches:
     by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
   earliest_offset: $info_min_time$
   latest_offset: $info_max_time$
+- name: Investigate processes on $dest$ 
+  search: '| from datamodel:Endpoint.Processes| search dest=$dest$ process_name=$process_name$'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
 rba:
   message: A process for a known remote access software $process_name$ was identified
     on $dest$.
@@ -72,13 +76,16 @@ rba:
   threat_objects:
   - field: process_name
     type: process_name
+  - field: signature
+    type: signature
 tags:
   analytic_story:
   - Insider Threat
   - Command And Control
   - Ransomware
   - Gozi Malware
   - CISA AA24-241A
+  - Remote Monitoring and Management Software
   asset_type: Endpoint
   mitre_attack_id:
   - T1219

detections/endpoint/detect_remote_access_software_usage_registry.yml

@@ -1,6 +1,6 @@
 name: Detect Remote Access Software Usage Registry
 id: 33804986-25dd-43cf-bb6b-dc14956c7cbc
-version: 2
+version: 3
 date: '2025-01-10'
 author: Steven Dick
 status: production
@@ -60,6 +60,7 @@ tags:
   - Ransomware
   - Gozi Malware
   - CISA AA24-241A
+  - Remote Monitoring and Management Software
   asset_type: Endpoint
   mitre_attack_id: 
   - T1219

detections/network/detect_remote_access_software_usage_dns.yml

@@ -1,6 +1,6 @@
 name: Detect Remote Access Software Usage DNS
 id: a16b797d-e309-41bd-8ba0-5067dae2e4be
-version: 5
+version: 6
 date: '2024-11-15'
 author: Steven Dick
 status: production
@@ -52,21 +52,28 @@ drilldown_searches:
     | `security_content_ctime(lastTime)`'
   earliest_offset: $info_min_time$
   latest_offset: $info_max_time$
+- name: Investigate traffic to $query$ 
+  search: '| from datamodel:Network_Resolution.DNS | search src=$src$ query=$query$'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
 rba:
   message: A domain for a known remote access software $query$ was contacted by $src$.
   risk_objects:
   - field: src
     type: system
-    score: 4
+    score: 25
   threat_objects:
   - field: query
     type: domain
+  - field: signature
+    type: signature
 tags:
   analytic_story:
   - Insider Threat
   - Command And Control
   - Ransomware
   - CISA AA24-241A
+  - Remote Monitoring and Management Software
   asset_type: Endpoint
   mitre_attack_id:
   - T1219

detections/network/detect_remote_access_software_usage_traffic.yml

@@ -1,6 +1,6 @@
 name: Detect Remote Access Software Usage Traffic
 id: 885ea672-07ee-475a-879e-60d28aa5dd42
-version: 5
+version: 6
 date: '2024-11-15'
 author: Steven Dick
 status: production
@@ -52,19 +52,29 @@ drilldown_searches:
     | `security_content_ctime(lastTime)`'
   earliest_offset: $info_min_time$
   latest_offset: $info_max_time$
+- name: Investigate application traffic for $app$ 
+  search: '| from datamodel:Network_Traffic.All_Traffic | search src=$src$ app=$app$'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
 rba:
   message: Application traffic for a known remote access software [$signature$] was
     detected from $src$.
   risk_objects:
   - field: src
     type: system
     score: 25
-  threat_objects: []
+  - field: user
+    type: user
+    score: 25    
+  threat_objects:
+  - field: signature
+    type: signature
 tags:
   analytic_story:
   - Insider Threat
   - Command And Control
   - Ransomware
+  - Remote Monitoring and Management Software
   asset_type: Network
   mitre_attack_id:
   - T1219

detections/web/detect_remote_access_software_usage_url.yml

@@ -1,6 +1,6 @@
 name: Detect Remote Access Software Usage URL
 id: 9296f515-073c-43a5-88ec-eda5a4626654
-version: 6
+version: 7
 date: '2024-11-15'
 author: Steven Dick
 status: production
@@ -52,6 +52,10 @@ drilldown_searches:
     by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
   earliest_offset: $info_min_time$
   latest_offset: $info_max_time$
+- name: Investigate traffic to $url_domain$ 
+  search: '| from datamodel:Web | search src=$src$ url_domain=$url_domain$'
+  earliest_offset: $info_min_time$
+  latest_offset: $info_max_time$
 rba:
   message: A domain for a known remote access software $url_domain$ was contacted
     by $src$.
@@ -65,12 +69,15 @@ rba:
   threat_objects:
   - field: url_domain
     type: domain
+  - field: signature
+    type: signature    
 tags:
   analytic_story:
   - Insider Threat
   - Command And Control
   - Ransomware
   - CISA AA24-241A
+  - Remote Monitoring and Management Software
   asset_type: Network
   mitre_attack_id:
   - T1219

stories/remote_monitoring_and_management_software.yml

@@ -0,0 +1,25 @@
+name: Remote Monitoring and Management Software
+id: e405907a-273c-41c9-928c-768c9355c1f7
+version: 1
+date: '2025-01-14'
+author: Steven Dick
+status: production
+description: |-
+  Fortify your remote access and unapproved software monitoring with searches that monitor for and help you investigate the use of unappoved or malicious remote monitoring and management softwares (RMM).
+narrative: |-
+  Attackers can leverage a variety of 3rd party software to establish unapproved remote access or c2 channels to an enterprise network. Common techniques include the installation of these remote access software via channels via phishing, scam, or driveby malware compromise situations. While this Analytic Story is not a comprehensive listing of all RMM software it provides a useful starting point for well known indicators.
+  
+  Be sure to leverage the "RMM Software Tracking" dashboard provided with this story for a convienent way to vizualize RMM usage in your enviroment.
+references:
+- https://attack.mitre.org/techniques/T1219/
+- https://thedfirreport.com/2022/08/08/bumblebee-roasts-its-way-to-domain-admin/
+- https://thedfirreport.com/2022/11/28/emotet-strikes-again-lnk-file-leads-to-domain-wide-ransomware/
+tags:
+  category:
+  - Malware
+  - Adversary Tactics
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  usecase: Security Monitoring