Trellix Insights: Qbot Using Office Downloader to Spread
Technical Articles ID:
KB95164
Last Modified: 2022-09-06 06:22:26 Etc/GMT
Last Modified: 2022-09-06 06:22:26 Etc/GMT
Environment
IMPORTANT: This Knowledge Base article discusses a specific threat that is being automatically tracked by Trellix Insights technology. The content is intended for use by Trellix Insights users, but is provided for general knowledge to all customers. Contact us for more information about Trellix Insights.
Summary
A phishing campaign using malicious macros inside Microsoft Office documents has been uncovered. The user is coerced with various themes to enable editing and modification of the document, to allow the malicious code to execute and download the final payload. In this campaign, the final payload observed is QakBot, an information stealer and banking trojan.
Our Threat Research team gathers and analyzes information from multiple open and closed sources before disseminating intelligence reports. This campaign was researched by InQuest 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 . - Review KB87843 - Dynamic Application Containment rules and best practices.
- Review KB82925 - Identify what rule corresponds to an Adaptive Threat Protection and Threat Intelligence Exchange event.
id: 438025f9-5856-4663-83f7-52f878a70a50 status: experimental description: Detects a Windows command and scripting interpreter executable started from Microsoft Word, Excel, Powerpoint, Publisher and Visio references: - https://www.hybrid-analysis.com/sample/465aabe132ccb949e75b8ab9c5bda36d80cf2fd503d52b8bad54e295f28bbc21?environmentId=100 - https://mgreen27.github.io/posts/2018/04/02/DownloadCradle.html tags: - attack.execution - attack.t1204 # an old one - attack.t1204.002 author: Michael Haag, Florian Roth, Markus Neis, Elastic, FPT.EagleEye Team date: 2018/04/06 modified: 2020/09/01 logsource: category: process_creation produc%WINDIR%\ detection: selection: ParentImage|endswith: - '\WINWORD.EXE' - '\EXCEL.EXE' - '\POWERPNT.exe' - '\MSPUB.exe' - '\VISIO.exe' - '\OUTLOOK.EXE' - '\MSACCESS.EXE' - '\EQNEDT32.EXE' Image|endswith: - '\cmd.exe' - '\powershell.exe' - '\wscript.exe' - '\cscript.exe' - '\sh.exe' - '\bash.exe' - '\scrcons.exe' - '\schtasks.exe' - '\regsvr32.exe' - '\hh.exe' - '\wmic.exe' # https://app.any.run/tasks/c903e9c8-0350-440c-8688-3881b556b8e0/ - '\mshta.exe' - '\rundll32.exe' - '\msiexec.exe' - '\forfiles.exe' - '\scriptrunner.exe' - '\mftrace.exe' - '\AppVLP.exe' - '\svchost.exe' # https://www.vmray.com/analyses/2d2fa29185ad/report/overview.html - '\msbuild.exe' # https://github.com/elastic/detection-rules/blob/main/rules/windows/defense_evasion_execution_msbuild_started_by_office_app.toml condition: selection fields: - CommandLine - ParentCommandLine falsepositives: - unknown level: high |
This Knowledge Base article discusses a specific threat that's being tracked. The list of IOCs will change over time; check Trellix Insights for the latest IOCs.
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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:
Endpoint Security - Exploit Prevention:
Rule ID: 6086 PowerShell Command Restriction - Command
Host Intrusion Prevention:
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:
Host Intrusion Prevention:
Rule ID: 6010 Generic Application Hooking Protection
Rule ID: 6011 Generic Application Invocation Protection
Rule ID: 1148 CMD Tool Access by a Network Aware Application