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CVE-2017-8570 Vulnerability downloads high-profile malware

    • Updated:
    • 13 Apr 2020
    • Product/Version:
    • Apex One 2019
    • Deep Discovery Email Inspector 3.5
    • Deep Discovery Inspector 5.5
    • Deep Security 12.0
    • InterScan Messaging Security Suite 9.1
    • Interscan Messaging Security Virtual Appliance 9.1
    • Interscan Web Security Virtual Appliance 6.5
    • OfficeScan XG
    • ScanMail for Exchange 14.0
    • Worry-Free Business Security Advanced 10.0
    • Worry-Free Business Security Standard 10
    • Platform:
    • N/A N/A

The CVE-2017-8570 vulnerability of Microsoft Office allows a remote code execution vulnerability because it handles objects in memory. An attacker can execute arbitrary code on the system because of improper handling of objects in memory. By tricking a victim to open a weaponized document, the attacker could exploit this vulnerability to execute arbitrary code on the system with the privileges of the victim.

Some malicious Rich Text Format (RTF) documents used as malspam attachments leverage the vulnerability to install malicious payload on the machine of victims. These malspam and phishing emails use social engineering techniques such as fake product order requests and invoice documents to trick the victims to open the attachments. This vulnerability now serves as downloader to other high-profile malware such as Loki and Nanocore.


  • Downloads high-profile malware namely Loki and Nanocore
  • Uses composite moniker in the RTF file to execute a Windows Script Component (WSC) file or scriptlet (.sct) on the victim’s machine
  • Bypasses the Microsoft patch for CVE-2017-0199


  • Download Routine


  • Compromise system security - downloads and installs additional malware

Infection Routine

Fareit Infection Details

Sample Spam (Product Order Request)

Sample Spam message


File Reputation

Detection/Policy/RulesPattern Branch/VersionRelease Date
  • Trojan.W97M.CVE20178570.SM
  • Trojan.W97M.CVE20178570.AUA
ENT OPR 15.311.00
August 20, 2019

Behavior Monitoring

Pattern Branch/VersionRelease Date
May 10, 2019

Web Reputation

DetectionPattern Branch
URL Protection
In the Cloud


Pattern VersionRelease Date
AS Pattern 4860August 20, 2019

Solution Map: What should customers do?

Trend Micro SolutionProductLatest VersionVirus PatternAnti-spam PatternNetwork PatternBehavior MonitoringPredictive Learning MachineWeb Reputation
Endpoint SecurityApex One2019Update Pattern via
web console
Not Applicable
Not Applicable
Enable Behavior Monitoring and
update pattern via
web console
Not Applicable
Enable Web Reputation Service and
update pattern via
web console
Worry-Free Business SecurityStandard (10.0)
Advanced (10.0)Update pattern via
web console
Hybrid Cloud SecurityDeep Security12.0Update pattern via
web console
Not Applicable
Email and Gateway SecurityDeep Discovery Email Inspector3.5Update pattern via
web console
Update pattern via
web console
Not Applicable
InterScan Messaging Security9.1
InterScan Web Security6.5
ScanMail for Microsoft Exchange14.0
Network SecurityDeep Discovery Inspector5.5
Not Applicable
Not Applicable


Threat Report


Remove a Malware / Virus
Solution Id:
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