Description of Campaign
Threat actors are delivering the Vidar information stealer in an email phishing campaign that has an .iso file that's disguised as a document file. The document is a compressed iso file that contains a Windows help file and an executable that's the Vidar information stealer. The malware attempts to detect sandbox and VM dlls to evade analysis. If successfully executed, the malware retrieves dependencies from the threat actors C2. The malware also has the capabilities to download additional malware as well as delete artifacts of the malware infection.

Our ATR Team gathers and analyzes information from multiple open and closed sources before disseminating intelligence reports. This campaign was researched by Trustwave and shared publicly.

How to use this article:

1. If a Threat Hunting table has been created, use the rules contained to search for malware related to this campaign. 
2. Review the product detection table and confirm that your environment is at least on the specified content version.
   To download the latest content versions, go to the Security Updates page.
3. Scroll down and review the "Product Countermeasures" section of this article. Consider implementing them if they are not already in place.
4. Review KB91836 - Countermeasures for entry vector threats.
5. Review KB87843 - Dynamic Application Containment rules and best practices.
6. Review KB82925 - Identify what rule corresponds to an Adaptive Threat Protection and Threat Intelligence Exchange event.

This Knowledge Base article discusses a specific threat that's being tracked. The list of IOCs will change over time; check MVISION Insights for the latest IOCs.
 
Campaign IOC

Type	Value
SHA256	B6B6DF6ABB52D7D2E2EB8496C04D76E2A01E51703B7CE44AA127D60CE53A0BE7

Minimum Content Versions

Content Type	Version
V2 DAT (VirusScan Enterprise)	10271
V3 DAT (Endpoint Security)	4730

 
Detection Summary                               

IOC	Scanner	Detection
B6B6DF6ABB52D7D2E2EB8496C04D76E2A01E51703B7CE44AA127D60CE53A0BE7	AVEngine V2	Packed-GEE!785498D72002
	AVEngine V3	Packed-GEE!785498D72002
	JTI (ATP Rules)	JTI/Suspect.196612!785498d72002
	RP Static	-
	RP Dynamic	-

Minimum set of Manual Rules to improve protection to block this campaign:

IMPORTANT: Always follow best practices when you enable new rules and signatures.

When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.

For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.

Endpoint Security - Advanced Threat Protection:
Aggressive set of Manual Rules to improve protection to block this campaign:

IMPORTANT: Always follow best practices when you enable new rules and signatures.

When you implement new rules or signatures, always set them to Report mode first and check the alerts generated. Resolve any issues that arise and then set the rules to Block. This step mitigates against triggering false positives and allows you to refine your configuration.

For more information, see KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.

Host Intrusion Prevention: