Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This query can be used to explore any instances where a terminated individual (i.e. one who has an impending termination date but has not left the company) downloads a large number of files from a non-Domain network address.
'CreepyDrive uses OneDrive for command and control, however, it makes regular requests to predicatable paths.
This detecton will alert when over 20 sequences are observed in a single day.'
This detecton will alert when over 20 sequences are observed in a single day.'
Intent:
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
Detects DNS queries to "ufile.io", which was seen abused by malware and threat actors as a method for data exfiltration
Intent:
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
Detects Rclone config files being created
This query can be used to detect instances of a malicious insider creating a file archive and then emailing that archive to an external "competitor" organization.
'This hunting query looks for increases in the number of workspaces queried by a user.'
'CreepyDrive uses OneDrive for command and control. This detection identifies URLs specific to CreepyDrive.'
RClone Execution
Sigma
Detects execution of RClone utility for exfiltration as used by various ransomwares strains like REvil, Conti, FiveHands, etc
Detects execution of RClone utility for exfiltration as used by various ransomwares strains like REvil, Conti, FiveHands, etc
Detects DNS queries for subdomains related to MEGA sharing website
Detects DNS queries for anonfiles.com, which is an anonymous file upload platform often used for malicious purposes
Detects DNS queries to "ufile.io", which was seen abused by malware and threat actors as a method for data exfiltration
Detects execution of RClone utility for exfiltration as used by various ransomwares strains like REvil, Conti, FiveHands, etc
This query looks for file download events identified by Microsoft Defender for Cloud Apps. It will require an corresponding app connector in Microsoft Defender for Cloud Apps.
Reference - https://learn.microsoft.com/defender-cloud-apps/enable-instant-visibility-protection-and-governance-actions-for-your-apps
Reference - https://learn.microsoft.com/defender-cloud-apps/enable-instant-visibility-protection-and-governance-actions-for-your-apps
Detects a specific user agent string and host ('api.dropbox.com') associated with an APT40 Dropbox tool, indicating potential data exfiltration or command and control activity via Dropbox.
This analytic detects potentially suspicious large outbound data transfers from internal to external networks using Cisco Secure Firewall Threat Defense logs. It calculates the total volume of data exchanged per connection by summing InitiatorBytes and ResponderBytes. Connections exceeding 100 MB are flagged, as these may indicate unauthorized data exfiltration, especially if initiated by unusual users, hosts, or processes. The detection is scoped to inside-to-outside network flows. If confirmed malicious, this behavior may reflect data staging and exfiltration over an encrypted or stealthy transport.
Anonymous links can be used to export files from OneDrive. While this isn't always a sign of malicious activity, some organizations do not support the creation of anonymous links because of the risk of data leakage. This rule detects the creation or modification of anonymous links in OneDrive.
This rule detects when a user attempts to download multiple unique files from OneDrive via the Microsoft Graph API, and these download attempts result in a 401 Unauthorized status code. This behavior may indicate a permissions issue for the user, potentially due to misconfiguration, revoked access, or an attempt to access unauthorized resources.
Detects the execution of the Rclone utility, which is often used by ransomware strains like REvil, Conti, and FiveHands for data exfiltration to cloud storage services. The rule looks for specific command-line arguments and image names associated with Rclone.
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