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Submission: On June 21 via api from US — Scanned from DE
Submission: On June 21 via api from US — Scanned from DE
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* Threat Encyclopedia
* Malware
* Trojan.W97M.CVE20170199.PFKKB
TROJAN.W97M.CVE20170199.PFKKB
July 21, 2021
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Analysis by: Arianne Grace Dela Cruz
--------------------------------------------------------------------------------
ALIASES:
TrojanDownloader:O97M/Donoff!rfn (MICROSOFT);
HEUR:Trojan-Downloader.MSOffice.Agent.gen (KASPERSKY)
PLATFORM:
Windows
OVERALL RISK RATING:
DAMAGE POTENTIAL:
DISTRIBUTION POTENTIAL:
REPORTED INFECTION:
INFORMATION EXPOSURE:
*
Threat Type: Trojan
*
Destructiveness: No
*
Encrypted: No
*
In the wild: Yes
OVERVIEW
Infection Channel: Downloaded from the Internet
This Trojan arrives on a system as a file dropped by other malware or as a file
downloaded unknowingly by users when visiting malicious sites.
It takes advantage of certain vulnerabilities. However, as of this writing, the
said sites are inaccessible.
TECHNICAL DETAILS
File Size: 132,343 bytes
File Type: DOCX
Memory Resident: No
Initial Samples Received Date: 13 Mar 2021
Payload: Connects to URLs/IPs
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file
downloaded unknowingly by users when visiting malicious sites.
Other Details
This Trojan does the following:
* It connects to the following URLs to load a malicious template file:
* https://www.{BLOCKED}c.it/shop_testbr/localization/dir_photoes/logo.php?image=plogo_vp.png
It takes advantage of the following vulnerabilities:
* CVE-2017-0199 | Microsoft Office/WordPad Remote Code Execution Vulnerability
w/ Windows
However, as of this writing, the said sites are inaccessible.
SOLUTION
Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.856.04
FIRST VSAPI PATTERN DATE: 21 Jul 2021
VSAPI OPR PATTERN File: 16.857.00
VSAPI OPR PATTERN Date: 22 Jul 2021
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users
must disable System Restore to allow full scanning of their computers.
Step 2
Identify and terminate files detected as Trojan.W97M.CVE20170199.PFKKB
[ Learn More ]
[ back ]
a. Windows Task Manager may not display all running processes. In this case,
please use a third-party process viewer, preferably Process Explorer, to
terminate the malware/grayware/spyware file. You may download the said tool
here.
b. If the detected file is displayed in either Windows Task Manager or Process
Explorer but you cannot delete it, restart your computer in safe mode. To do
this, refer to this link for the complete steps.
c. If the detected file is not displayed in either Windows Task Manager or
Process Explorer, continue doing the next steps.
To terminate the malware/grayware/spyware process:
1. Scan your computer with your Trend Micro product and take note of the name
of the malware/grayware/spyware detected.
2. Open Windows Task Manager. To do this, press CTRL+SHIFT+ESC.
3. View the list of all running programs. To do this:
• For Windows 7 and Server 2008 (R2) users, click the Processes tab.
• For Windows 8, 8.1, 10, and Server 2012 (R2) users, click the Details tab.
4. In the list of running programs, locate a malware/grayware/spyware file
detected earlier.
5. Select the detected files, then press either the End Task or the End Process
button, depending on the version of Windows you are using.
6. Do the same for the remaining detected malware/grayware/spyware files in the
list of running programs.
7. To check if the malware/grayware/spyware process has been terminated, close
Task Manager, and then open it again.
8. Close Task Manager.
Step 3
Scan your computer with your Trend Micro product to delete files detected as
Trojan.W97M.CVE20170199.PFKKB. If the detected files have already been cleaned,
deleted, or quarantined by your Trend Micro product, no further step is
required. You may opt to simply delete the quarantined files. Please check the
following Trend Micro Support pages for more information:
* Home and Home Office Support
* Business Support
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