TROJ_CVE201711882.UHAOBGZV
Exploit:W97M/CVE-2017-0199.B (FSecure), EXP/W97M.Agent.monhx (Antivir)
Windows
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Threat Type: Exploit
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Exploit arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
Arrival Details
This Exploit arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Exploit drops the following files:
- %User Temp%\dask.bat - Batch file that downloads and executes a file from a specific URL. Deleted when the word processor application is closed by user.
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
Download Routine
This Exploit connects to the following website(s) to download and execute a malicious file:
- http://{BLOCKED}.{BLOCKED}.128.199/a.ex
It takes advantage of the following software vulnerabilities to download possibly malicious files:
It saves the files it downloads using the following names:
- %User Temp%\win.exe
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
As of this writing, the said sites are inaccessible.
SOLUTION
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Search and delete these files
- %User Temp%\win.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_CVE201711882.UHAOBGZV. 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:
Step 5
Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.
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