Browse Rules

Netskope - Unsanctioned/Risky Cloud App Access (Shadow IT)

Alerts when users access unsanctioned or risky cloud applications based on Cloud Confidence Level (CCL) and app tags. Detects Shadow IT usage.

Netskope - Heavy Personal Cloud Storage Usage (Shadow IT)

Detects heavy usage of personal cloud storage applications like personal Dropbox, Google Drive, OneDrive personal, etc. Indicates potential Shadow IT or data leakage risk.

Suspicious Volume Shadow Copy VSS_PS.dll Load

Detects the image load of vss_ps.dll by uncommon executables. This DLL is used by the Volume Shadow Copy Service (VSS) to manage shadow copies of files and volumes. It is often abused by attackers to delete or manipulate shadow copies, which can hinder forensic investigations and data recovery efforts. The fact that it is loaded by processes that are not typically associated with VSS operations can indicate suspicious activity.

Suspicious Volume Shadow Copy VSS_PS.dll Load

Detects the image load of vss_ps.dll by uncommon executables. This DLL is used by the Volume Shadow Copy Service (VSS) to manage shadow copies of files and volumes. It is often abused by attackers to delete or manipulate shadow copies, which can hinder forensic investigations and data recovery efforts. The fact that it is loaded by processes that are not typically associated with VSS operations can indicate suspicious activity.

VSSAudit Security Event Source Registration

Detects the registration of the security event source VSSAudit. It would usually trigger when volume shadow copy operations happen.

VSSAudit Security Event Source Registration

Detects the registration of the security event source VSSAudit. It would usually trigger when volume shadow copy operations happen.

Resize ShadowStorage volume

The following analytic identifies the resizing of shadow storage volumes, a technique used by ransomware like CLOP to prevent the recreation of shadow volumes. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line executions involving "vssadmin.exe" with parameters related to resizing shadow storage. This activity is significant as it indicates an attempt to hinder recovery efforts by manipulating shadow copies. If confirmed malicious, this cou

Known Shadow Copy Delete command executed

This rule triggers when a known ransomware command is used to delete shadowcopies. A shadow copy is a backup or snapshot of a system. When this is deleted and a ransomware actor deploys ransomware it will not be possible to return to a previous stage.

Credential Dumping via Symlink to Shadow Copy

The following analytic detects the creation of a symlink to a shadow copy, which may indicate credential dumping attempts. It leverages the Endpoint.Processes data model in Splunk to identify processes executing commands containing "mklink" and "HarddiskVolumeShadowCopy". This activity is significant because attackers often use this technique to manipulate or delete shadow copies, hindering system backup and recovery efforts. If confirmed malicious, this could prevent data restoration, complicat

Creation of Shadow Copy

The following analytic detects the creation of shadow copies using Vssadmin or Wmic. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process execution logs that include command-line details. This activity is significant because creating shadow copies can be a precursor to ransomware attacks or data exfiltration, allowing attackers to bypass file locks and access sensitive data. If confirmed malicious, this behavior could enable attackers to maintain persistence,

Theom - Shadow DB with atypical accesses

"Creates Sentinel incidents for critical/high Theom risks, associated with ruleId TRIS0036 (Theom has observed shadow or clone databases/tables. Additionally, it has observed atypical accesses to these data stores. As per this requirement, use this information to apply data access control lists or access permissions and enforce data retention policies)"

Deleting Shadow Copies

The following analytic detects the deletion of shadow copies using the vssadmin.exe or wmic.exe utilities. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line arguments. This activity is significant because deleting shadow copies is a common tactic used by attackers to prevent recovery and hide their tracks. If confirmed malicious, this action could hinder incident response efforts and allow attackers to maintain persistence and cover t

Theom - Overprovisioned Roles Shadow DB

"Creates Sentinel incidents for critical/high Theom risks, associated with ruleId TRIS0034 (Theom has observed shadow (or clone) databases/tables. Additionally, it has observed roles that are overprovisioned for these data stores. As per this requirement, use this information to apply data access control lists or access permissions and enforce data retention policies)"

Creation of Shadow Copy with wmic and powershell

The following analytic detects the creation of shadow copies using "wmic" or "Powershell" commands. It leverages the Endpoint.Processes data model in Splunk to identify processes where the command includes "shadowcopy" and "create". This activity is significant because it may indicate an attacker attempting to manipulate or access data in an unauthorized manner, potentially leading to data theft or manipulation. If confirmed malicious, this behavior could allow attackers to backup and exfiltrate

Credential Dumping via Copy Command from Shadow Copy

The following analytic detects the use of the copy command to dump credentials from a shadow copy. It leverages Endpoint Detection and Response (EDR) data to identify processes with command lines referencing critical files like "sam", "security", "system", and "ntds.dit" in system directories. This activity is significant as it indicates an attempt to extract credentials, a common technique for unauthorized access and privilege escalation. If confirmed malicious, this could lead to attackers gai

Salesforce Third-Party Integration Monitoring

Monitors third-party integrations and OAuth connected apps accessing Salesforce. Connected apps use OAuth for authorization and can access data on behalf of users, making them a potential vector for: - Unauthorized data access - Shadow IT applications - Compromised OAuth tokens - Over-privileged integrations This detection triggers on connected app usage events and adjusts severity based on: - Connection type (refresh tokens are higher risk) - App authorization events - Suspicious app naming pa

Theom - Least priv large value shadow DB

"Creates Sentinel incidents for critical/high Theom risks, associated with ruleId TRIS0032 (Theom has observed shadow (or clone) databases/tables that have a large financial value. Additionally, it has observed roles that are overprovisioned for these data stores. As per this requirement, use this information to apply data access control lists or access permissions and enforce data retention policies)"

Windows WMIC Shadowcopy Delete

This analytic detects the use of WMIC to delete volume shadow copies, which is a common technique used by ransomware actors to prevent system recovery. Ransomware like Cactus often delete shadow copies before encrypting files to ensure victims cannot recover their data without paying the ransom. This behavior is particularly concerning as it indicates potential ransomware activity or malicious actors attempting to prevent system recovery.

Diskshadow Script Mode Execution

Detects execution of "Diskshadow.exe" in script mode using the "/s" flag. Attackers often abuse "diskshadow" to execute scripts that deleted the shadow copies on the systems. Investigate the content of the scripts and its location.

Netskope - Suspicious Application Activity (Low Confidence / Risky App)

Detects activity involving risky or low Cloud Confidence Level (CCL) applications, blocked application actions, or sensitive activities (upload, share, download) on unsanctioned apps. Helps surface Shadow IT and potential data leakage via risky cloud applications.

Diskshadow Script Mode Execution

Detects execution of "Diskshadow.exe" in script mode using the "/s" flag. Attackers often abuse "diskshadow" to execute scripts that deleted the shadow copies on the systems. Investigate the content of the scripts and its location.

Diskshadow Script Mode Execution

Detects execution of "Diskshadow.exe" in script mode using the "/s" flag. Attackers often abuse "diskshadow" to execute scripts that deleted the shadow copies on the systems. Investigate the content of the scripts and its location.

Delete ShadowCopy With PowerShell

The following analytic detects the use of PowerShell to delete shadow copies via the WMIC PowerShell module. It leverages EventCode 4104 and searches for specific keywords like "ShadowCopy," "Delete," or "Remove" within the ScriptBlockText. This activity is significant because deleting shadow copies is a common tactic used by ransomware, such as DarkSide, to prevent data recovery. If confirmed malicious, this action could lead to irreversible data loss and hinder recovery efforts, significantly

Windows Local LLM Framework Execution

The following analytic detects execution of unauthorized local LLM frameworks (Ollama, LM Studio, GPT4All, Jan, llama.cpp, KoboldCPP, Oobabooga, NutStudio) and Python-based AI/ML libraries (HuggingFace Transformers, LangChain) on Windows endpoints by leveraging process creation events. It identifies cases where known LLM framework executables are launched or command-line arguments reference AI/ML libraries. This activity is significant as it may indicate shadow AI deployments, unauthorized model

XbowNewAssetDiscovered

Alerts when a new asset is registered in XBOW for the first time. This is detected by matching assets whose CreatedAt timestamp falls within the current query window, indicating the asset was newly added rather than updated. This helps track shadow IT, new deployments, and any unexpected expansion of the external attack surface.