Phishing Investigation - Generic v2

This Playbook is part of the Phishing Pack.#

Usage#

Use this playbook to investigate and remediate a potential phishing incident and detect phishing campaigns. The playbook simultaneously engages with the user that triggered the incident, while investigating the incident itself.

The final remediation tasks are always decided by a human analyst.

To see how to set up a phishing incident generally in Cortex XSOAR, go to the Phishing Use Case Tutorial.

Triggers#

The investigation is triggered by an email sent or forwarded to a designated "phishing inbox". A mail listener integration that listens to that mailbox, will use every received email to create a phishing incident in Cortex XSOAR. A mail listener can be one of the following integrations:

EWS v2
Gmail
Mail Listener (does not support retrieval of original emails when the suspected emails are not attached)

Configuration#

Create an email inbox that should be used for phishing reports. Make sure the user in control of that inbox has the permissions required by your integration (EWS v2 or Gmail).
Configure the Phishing incident type to run the Phishing Investigation - Generic v2 playbook.
Configure the inputs of the main Phishing Investigation - Generic v2 playbook.
Optional - configure the Active Directory critical asset names under the inputs of the Calculate Severity - Generic v2 inputs or leave them empty.
Optional - Should you want to perform domain-squatting checks - configure the InternalDomains input of the Email Address Enrichment - Generic v2.1 playbook. We recommend to configure this so we can provide better insight into phishing emails.
Optional - Configure the InternalRange and ResolveIP inputs of the IP Enrichment - External - Generic v2 playbook.
Optional - Configure the Rasterize and VerifyURL inputs of the URL Enrichment - Generic v2 playbook.
Optional - Personalize the user engagement messages sent throughout the investigation in the Phishing Investigation - Generic v2 playbook. These task have the following names:
- Acknowledge incident was received (task #13)
- Update the user that the reported email is safe (task #16)
- Update the user that the reported email is malicious (task #17)
- Update the user that the reported email is malicious (task #17
Optional - Configure the ExchangeLocation input of the Search And Delete Emails - Generic v2 playbook.
Optional - Personalize the inputs of the Detect & Manage Phishing Campaigns playbook.

Best Practices & Suggestions#

The email received in the designated phishing inbox should be an email containing the potential phishing email as a file attachment, so that the headers of the original suspected email are retained.
Using Gmail or EWS v2 work best with the use case.
If phishing emails are forwarded instead of attached as files, Auto extract should not be turned off so that all indicators are properly extracted and analyzed.
Configuring the optional configurations can greatly enhance the investigation.

Dependencies#

Builtin

Sub-playbooks#

Calculate Severity - Generic v2
Email Address Enrichment - Generic v2.1
Process Email - Generic
Extract Indicators From File - Generic v2
Detonate File - Generic
Entity Enrichment - Phishing v2
Search And Delete Emails - Generic v2
Block Indicators - Generic v2
Detect & Manage Phishing Campaigns
Process Microsoft's Anti-Spam Headers

Integrations#

This playbook does not use any integrations.

Scripts#

DBotPredictPhishingWords
CheckEmailAuthenticity
FindEmailCampaign
Set
AssignAnalystToIncident

Commands#

setIncident
closeInvestigation
send-mail

Playbook Inputs#

Name	Description	Default Value	Required
Role	The default role to assign the incident to.	Administrator	Required
SearchAndDelete	Enable the "Search and Delete" capability (can be either "True" or "False"). In case of a malicious email, the "Search and Delete" sub-playbook will look for other instances of the email and delete them pending analyst approval.	False	Optional
BlockIndicators	Enable the "Block Indicators" capability (can be either "True" or "False"). In case of a malicious email, the "Block Indicators" sub-playbook will block all malicious indicators in the relevant integrations.	False	Optional
AuthenticateEmail	Whether the authenticity of the email should be verified, using SPF, DKIM and DMARC.	False	Optional
OnCall	Set to true to assign only user that is currently on shift. Requires Cortex XSOAR v5.5 or later.	False	Optional
SearchAndDeleteIntegration	Determines which product and playbook will be used to search and delete the phishing email from users' inboxes. Set this to "O365" to use the O365 - Security And Compliance - Search And Delete playbook. Set this to "EWS" to use the Search And Delete Emails - EWS playbook.	EWS	Optional
O365DeleteType	The method by which to delete emails using the O365 - Security And Compliance - Search And Delete playbook. Could be "Soft" (recoverable), or "Hard" (unrecoverable). Leave empty to decide manually for each email incident. This is only applicable if the SearchAndDeleteIntegration input is set to O365.	Soft	Optional
O365ExchangeLocation	Used only when searching and deleting emails in O365. The exchange location. Determines from where to search and delete emails searched using O365 playbooks. Use the value "All" to search all mailboxes, use "SingleMailbox" to search and delete the email only from the recipient's inbox, or specify "Manual" to decide manually for every incident. Note - searching all mailboxes may take a significant amount of time. This input is only applicable if the SearchAndDeleteIntegration input is set to O365.	SingleMailbox	Optional
O365AllowNotFoundSearchLocations	Used only when searching and deleting emails in O365. Whether to include mailboxes other than regular user mailboxes in the compliance search. Default is "false".	true	Optional
O365ExchangeLocationExclusion	Used only when searching and deleting emails in O365. Comma-separated list of mailboxes/distribution groups to exclude when you use the value "All" for the O365ExchangeLocation input.		Optional
CheckMicrosoftHeaders	Check Microsoft's headers for BCL/PCL/SCL scores and set the "Severity" and "Email Classification" accordingly.	True	Optional

Playbook Outputs#

There are no outputs for this playbook.

Playbook Image#

Phishing_Investigation_Generic_v2