Description of Campaign
FormBook is commodity malware sold on hacker forums since 2016 that is designed to steal information from infected machines. The malware collects data through a keylogger or form grabber functionality and by collecting available data in browsers and email clients. A new variant of FormBook has been discovered circulating and spreading through malicious Microsoft PowerPoint files in phishing emails. The campaign used a fake purchase order theme with a malicious attachment to convince users to open the file. Malicious VBA code ran in the background after the file was opened resulting in a PowerShell command downloading the payload.
The McAfee Enterprise ATR Team gathers and analyzes information from multiple open and closed sources before disseminating intelligence reports.
This campaign was reported by researchers at Fortinet and shared publicly.
How to use this article:
- If a Threat Hunting table has been created, use the rules contained to search for malware related to this campaign.
- 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.
- Scroll down and review the "Product Countermeasures" section of this article. Consider implementing them if they are not already in place.
- Review KB91836 - Countermeasures for entry vector threats, which contains countermeasures.
- Review KB87843 - List of and best practices for Endpoint Security Dynamic Application Containment rules.
- 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 is being tracked. The list of IOCs will change over time; check MVISION Insights for the latest IOCs.
Campaign IOC
| Type |
Value |
| SHA256 |
F45A363A86D38E5814D41908C0EA5A13F8A89AF2AFEA931472F9905B87FB2ADC |
| SHA256 |
82BE061B2BFE48EE3A9F76EE99CF6F3ED712C0C1393AD4A9F064CFC4D11CB53D |
| URL |
http://kiibra.com/images/oe.exe |
| URL |
http://kiibra.com/images/index.jpg |
| DOMAIN |
kiibra.com |
Minimum Content Versions:
| Content Type |
Version |
| V2 DAT (VirusScan Enterprise) |
9956 |
| V3 DAT (Endpoint Security) |
4410 |
Detection Summary
| IOC |
Scanner |
Detection |
| F45A363A86D38E5814D41908C0EA5A13F8A89AF2AFEA931472F9905B87FB2ADC |
AVEngine V2 |
PWS-FCUF!68F61BB42F46 |
| AVEngine V3 |
PWS-FCUF!68F61BB42F46 |
| JTI (ATP Rules) |
JTI/Suspect.196612!68f61bb42f46 |
| RP Static |
Real Protect-XGPE!68F61BB42F46 |
| RP Dynamic |
- |
| IOC |
Scanner |
Detection |
| 82BE061B2BFE48EE3A9F76EE99CF6F3ED712C0C1393AD4A9F064CFC4D11CB53D |
AVEngine V2 |
W97M/Downloader.dec |
| AVEngine V3 |
W97M/Downloader.dec |
| JTI (ATP Rules) |
- |
| 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:
Rule ID: 4 Use GTI file reputation to identify trusted or malicious files
Endpoint Security - Exploit Prevention:
Rule ID: 6135 Unmanaged Powershell Detected
Rule ID: 6086 Powershell Command Restriction - Command
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.
Virusscan Enterprise - Access Protection Rules:
Prevent creation of new executable files in the Windows folder
Host Intrusion Prevention:
Rule ID: 6010 Generic Application Hooking Protection
Rule ID: 1148 CMD Tool Access by a Network Aware Application
Rule ID: 6011 Generic Application Invocation Protection
