TROJ_UPATRE.SMNF
TrojanDownloader:Win32/Upatre.AT(Microsoft), Downloader.Upatre(Norton), Troj/Dyreza-BL(Sophos), Win32/TrojanDownloader.Waski.A trojan(Eset)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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.
As of this writing, the said sites are inaccessible.
It connects to certain websites to send and receive information. It deletes the initially executed copy of itself.
TECHNICAL DETAILS
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.
Installation
This Trojan drops the following copies of itself into the affected system and executes them:
- %User Temp%\tubeini.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.)
It drops the following files:
- %User Temp%\tubei560T.txt - contains malware path and file name
(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.)
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- http://{BLOCKED}uellet.com/TOXICOUSTIQUE/arrowu.jpg
- http://{BLOCKED}ouver.com/cp/images/digits/arrowu.jpg
It saves the files it downloads using the following names:
- %User Temp%\xvuRzhuW9.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.
Information Theft
This Trojan gathers the following data:
- Computer name
- Operating system version
- Service pack installed
Other Details
This Trojan connects to the following URL(s) to get the affected system's IP address:
- http://checkip.dyndns.org/
It connects to the following website to send and receive information:
- {BLOCKED}.{BLOCKED}.141.100/0502uk12/{computername}/0/{OS Version}-{Service Pack}/0/
It deletes the initially executed copy of itself
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
Scan your computer with your Trend Micro product and note files detected as TROJ_UPATRE.SMNF
Step 4
Search and delete the file detected as TROJ_UPATRE.SMNF
Step 5
Search and delete these files
- %User Temp%\xvuRzhuW9.exe
- %User Temp%\tubei560T.txt
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_UPATRE.SMNF. 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.
Did this description help? Tell us how we did.