W2KM_DLOADR.YYSVZ
W97M/Downloader.brq (McAfee); TrojanDownloader:O97M/Donoff.DD (Microsoft); W97M.Downloader (Symantec); W97m.Downloader.EVX (F-Secure)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Spammed via email, Dropped by other malware
This Trojan 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.
It does not have any propagation routine.
It does not have any backdoor routine.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
193,024 bytes
DOC
No
08 Dec 2016
Downloads files, Connects to URLs/IPs
Arrival Details
This Trojan 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.
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Download Routine
This Trojan accesses the following websites to download files:
- http://{BLOCKED}ocsincz.top/eofficesxls.exe
It saves the files it downloads using the following names:
- %User Temp%\35735.exe
- %User Temp%\41772.exe
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
As of this writing, the said sites are inaccessible.
Other Details
This is the Trend Micro detection for Microsoft Word documents that are compromised through the insertion of a malicious macro.
NOTES:
The document contains the following fake details luring users to enable Macro Content:
It does not have rootkit capabilities.
It does not exploit any vulnerability.
SOLUTION
9.800
12.940.03
08 Dec 2016
12.941.00
09 Dec 2016
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
Identify and terminate files detected as W2KM_DLOADR.YYSVZ
- 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.
- 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.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Search and delete these files
- %User Temp%\35735.exe
- %User Temp%\41772.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as W2KM_DLOADR.YYSVZ. 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 this Knowledge Base page for more information.
Step 6
Enable the macro virus protection in Microsoft Office Applications
Did this description help? Tell us how we did.